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  • Article libreArticleEn anglais

    Characteristics of chicken production systems in rural Burkina Faso: A focus on One Health related practices and food security

    In addition to having cultural importance, village chicken production remains an important source of cash income for most rural households in Burkina Faso. However, strict biosecurity and good management of chicken flocks are required to reduce the risk of exposure of communities to chicken waste at household level. We characterized village production systems in rural Burkina Faso in relation to importance to food security, biosecurity, husbandry and chicken health management. We surveyed 483 chicken-producing households and carried out 20 focus group discussions separately with men and women chicken producers in Boussouma commune, a typical rural setting. Crop farming was reported as the main income-generating activity carried out by chicken producers (79.5%). Seveny six per cent of households sold chicken to local markets. Chicken production and sales were aligned to social/cultural events (religious festivals, weddings, etc…) and school-fee payment period. While men spent more revenues from chicken production on agriculture and household equipment’s, women spent more on food, education and medical expenses. The chicken management system is mainly extensive scavenging, with most farmers (81.4%) keeping 5 to 50 birds with little or no supplementary feeding and rudimentary housing. Most producers indicated that Newcastle disease was the main cause of chicken mortality. While men consider high disease burden, lack of finance, and poor chicken housing as the major constraints, women prioritized the lack of adequate chicken housing, lack of feeds and limited access to veterinary services. With locally adapted interventions that build one a One Health approach, village chicken keeping has the potential to secure and greatly improve smallholder livelihoods and household food security, while preserving public health in Burkina Faso.

    Biostatistiques et épidémiologieSanté publiqueLicence : Creative Commons Attribution License This is an open access article distributed under the terms of the, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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  • Article libreArticleEn anglais

    Characteristics of HIV-2 and HIV-1/HIV-2 Dually Seropositive Adults in West Africa Presenting for Care and Antiretroviral Therapy: The IeDEA-West Africa HIV-2 Cohort Study

    BackgroundHIV-2 is endemic in West Africa. There is a lack of evidence-based guidelines on the diagnosis, management and antiretroviral therapy (ART) for HIV-2 or HIV-1/HIV-2 dual infections. Because of these issues, we designed a West African collaborative cohort for HIV-2 infection within the framework of the International epidemiological Databases to Evaluate AIDS (IeDEA).MethodsWe collected data on all HIV-2 and HIV-1/HIV-2 dually seropositive patients (both ARV-naive and starting ART) and followed-up in clinical centres in the IeDEA-WA network including a total of 13 clinics in five countries: Benin, Burkina-Faso Côte d’Ivoire, Mali, and Senegal, in the West Africa region.ResultsData was merged for 1,754 patients (56% female), including 1,021 HIV-2 infected patients (551 on ART) and 733 dually seropositive for both HIV-1 and HIV 2 (463 on ART). At ART initiation, the median age of HIV-2 patients was 45.3 years, IQR: (38.3–51.7) and 42.4 years, IQR (37.0–47.3) for dually seropositive patients (p = 0.048). Overall, 16.7% of HIV-2 patients on ART had an advanced clinical stage (WHO IV or CDC-C). The median CD4 count at the ART initiation is 166 cells/mm3, IQR (83–247) among HIV-2 infected patients and 146 cells/mm3, IQR (55–249) among dually seropositive patients. Overall, in ART-treated patients, the CD4 count increased 126 cells/mm3 after 24 months on ART for HIV-2 patients and 169 cells/mm3 for dually seropositive patients. Of 551 HIV-2 patients on ART, 5.8% died and 10.2% were lost to follow-up during the median time on ART of 2.4 years, IQR (0.7–4.3).ConclusionsThis large multi-country study of HIV-2 and HIV-1/HIV-2 dual infection in West Africa suggests that routine clinical care is less than optimal and that management and treatment of HIV-2 could be further informed by ongoing studies and randomized clinical trials in this population.

    Biostatistiques et épidémiologieImmunologieMaladies infectieuses et tropicalesLicence : This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.
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  • Article libreArticleEn anglais

    Characteristics of Nontyphoid Salmonella Isolated from Human, Environmental, Animal, and Food Samples in Burkina Faso: A Systematic Review and Meta-Analysis

    Salmonella is one of the world’s leading causes of zoonotic and foodborne illnesses. Recently, antimicrobial resistance (AMR) has become one of the most critical challenges to public health and food safety. Herein, we employed a meta-analysis to determine the pooled prevalence and spatiotemporal distribution of serovars and antimicrobial resistance in NTS in Burkina Faso. To find eligible articles, a comprehensive literature search of PubMed, African Journals Online, ScienceDirect, Google Scholar, and the gray literature (university libraries) in Burkina was conducted for the period from 2008 to 2020. Studies meeting the inclusion criteria were selected and assessed for risk of bias. To assess the temporal and spatial relationships between serotypes and resistant strains from humans, animals, food, and the environment, a random-effects statistical model meta-analysis was carried out using the Comprehensive Meta-Analysis Version 3.0 program. The NTS prevalence rates were 4.6% (95% CI: 3–7) and 20.1% (95% CI: 6.6–47.4) in humans and animals, respectively, and 16.8% (95% CI: 10.5–25.8) and 15.6% (95% CI: 8.2–27.5) in food and the environment, respectively. Most NTS serovars were S. Derby, reported both in food and animals, and S. Typhimurium, reported in humans, while S. Croft II, S. Jodpur II, and S. Kentucky were the most prevalent in the environment. NTS isolates were highly resistant to erythromycin, amoxicillin, cefixime, and cephalothin, with a pooled prevalence of multidrug resistance of 29% (95% CI: 14.5–49.5). The results of this review show a high diversity of Salmonella serotypes, as well as high antibiotic resistance in Salmonella isolates from animal, human, food, and environmental samples in Burkina, calling for a consolidated “One Health” approach to better understand the drivers of pathogen emergence, spread, and antimicrobial resistance, as well as the formulation of intervention measures needed to limit the risk associated with the disease.

    Biostatistiques et épidémiologieMicrobiologie (bactériologie, virologie)PharmacologieLicence : https://creativecommons.org/licenses/by/4.0/ Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ().
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  • Article libreArticleEn anglais

    Characteristics of Obstetric and Iatrogenic Urogenital Fistulas in Burkina Faso: A Cross-Sectional Study

    Fasnéwindé Aristide Kabore, Stéphanie Dominique Amida Nama, Boureima Ouedraogo, Moussa Kabore, Adama Ouattara, Brahima Kirakoya, Gilles Karsenty

    Objective To compare the sociodemographic, clinical, and therapeutic characteristics of obstetric urogenital fistulas (OF) and iatrogenic urogenital fistulas (IF) treated in seven centers in Burkina Faso. Material and Methods. We carried out a cross-sectional study over a seven years' period (January 1, 2010 to December 31, 2016). We considered as iatrogenic all urogenital fistulas (UGF) occurred after elective caesarean section, gynecologic surgery (hysterectomy, myomectomy, and prolapse repair), or induced abortion. UGF following vaginal delivery after prolonged labor without obstetric maneuvers or caesarean section were considered as obstetric. UGF caused by other mechanisms (emergency caesarian section, congenital, and traumatic) were excluded from this study. The statistical analysis was carried out using version 14 of the STATA software. A logistic regression model was used to compare the two groups. Results 310 cases of UGF were included. IF accounted for 25.8% (n = 80) versus 74.2% (n = 230) for OF. The median age was 35 years for IF and 35.38 years for OF. The vesicovaginal fistulas were predominant (74.5%) in the two groups. All circumferential fistulas were found in the OF group. OF were frequently associated with residence in rural areas (OR = 1.8; CI = [1.05–3.1]), low level of education (OR = 5.4; CI = [2.3–12.9]), and a height under 158 cm (OR = 3.4 CI = [1.7–6.6]). Vaginal sclerosis was less common among IF (OR = 2.2; CI = [1–4.6]). The failure of surgical treatment after 3 months was more associated with OF (OR = 4.7; CI = [1.1–20.5]). Conclusion OF were the most common, frequently affecting short women living in rural area and with low level of schooling. Fistulas were also more severe in the OF group. IF gave better results after surgical repair.

    Gynécologie-obstétriqueSanté publiqueLicence : This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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  • Article libreArticleEn anglais

    Characteristics of obstetric urogenital fistulas in a regional teaching hospital in Burkina Faso: a retrospective cross-sectional study

    Tiéoulé Mamadou Traore, Souleymane Ouedraogo, Moussa Kabore, Salam Ouedraogo, Joël Judicaël Traore

    IntroductionObstetric fistula (OF) remains a major public health problem in low-income countries. This study aimed to investigate the sociodemographic, clinical, and therapeutic characteristics of obstetric urogenital fistulas in a regional teaching hospital in Burkina Faso.Methodsa retrospective cross-sectional study from 1st January 2015 to 31st December 2019 included 50 women who underwent OF surgery repair in the regional teaching hospital of Ouahigouya in Burkina Faso. Case identification was completed by self-reported constant urine leakage and was confirmed by clinical assessment. Data on socio-demographic, clinical, and therapeutic characteristics have been collected from the hospital medical records and analyzed.Resultsthe mean age of the patients was 29.40 ± 9.4 years (range 15 -55 years). The majority of patients were in the age group between (15-25) years old (44%). Forty-three patients (86%) were residing in rural areas and forty-seven patients (94%) were housekeepers. Twenty-six patients (52%) were primiparous. The majority of patients had received no prenatal care 29 (58%). The majority of patients had a spontaneous vaginal delivery 36 (72%). The duration of labor was greater than 48 hours in 31 (62%) patients. Vesicovaginal fistulas (VVF) accounted for 80% of cases. Ten (20%) patients had previously undergone surgery for the same fistula. The mean size of the fistulas was 1.8±1.4 cm (range 0.5 - 6 cm). At three months of follow-up, the successful closure rate was 68%. Sixteen (32%) patients have experienced a failure of fistula closure.Conclusionthe majority of fistula survivors were women of reproductive age who were living in rural areas and housekeepers. Mothers having no antenatal care, and having prolonged labor were at increased risk of developing OF. The majority of fistulas were simple fistulas and the most common type of OF was VVF. Surgical outcomes showed a high failure rate.

    Gynécologie-obstétriqueSanté publiqueLicence : https://creativecommons.org/licenses/by/4.0/ The Pan African Medical Journal (ISSN: 1937-8688). This is an Open Access article distributed under the terms of the Creative Commons Attribution International 4.0 License (), which permits unrestricted use, distribution, and reproduction in any medium, p
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  • Article libreArticleEn anglais

    Characteristics, management and factors associated with poor outcomes in COVID-19 patients in Burkina Faso: insights from a 2021 large-scale ambispective study

    Ariane Mamguem Kamga, Samiratou Ouédraogo, Firmin Nongodo Kaboré, Isidore Tiandiogo Traoré, Esperance Ouédraogo, Armel Poda, Arnaud Eric Diendéré, Dramane Kania, Hermann Badolo, Guillaume Sanou, Amariane Koné, Therese Samdapawindé Kagoné, Blahima Konaté, Rachel Médah, Nathalie de Rekeneire, Boukary Ouédraogo, Oumar Billa, Gilles Paradis, Halidou Tinto, Tienhan Sandrine Dabakuyo-yonli

    ObjectivesTo assess treatment and identify predictive factors of worsening in COVID-19 patients.MethodsThis study was ambispective (both prospective and retrospective) and part of a multidisciplinary, multicenter project designed to generate epidemiological, sociological and anthropological data about the COVID-19 epidemic in Burkina Faso. Medical records of patients admitted for COVID-19 at the hospitals of Ouagadougou and Bobo-Dioulasso from March 2020 to April 2021 were reviewed. To identify predictive factors of severe complications, we used Poisson regression models.ResultsIn total, 1,511 patients were included, of whom 70% were aged ≤50 years, 59% were men and 97% were living in an urban area. Of the 86% of patients treated, 92.9% of them received the combo Azithromycin-hydroxychloroquine. A total of 78 (5.2%) patients experienced complications during hospitalization, and 49 (3.3%) patients died. Multivariate analysis identified patient's age, residence and comorbidity as factors associated with poor outcomes.ConclusionsAlthough most people had symptoms, most of them recovered without sequelae, and few patients had severe forms of disease. Age was a strong predictor of worse outcomes in this population.

    Biostatistiques et épidémiologieSanté publiqueLicence : This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journa
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  • Article libreArticleEn anglais

    Characterization and Antimicrobial Susceptibility of Lactococcus lactis Isolated from Endodontic Infections in Ouagadougou, Burkina Faso

    Wendpoulomdé Aimé Désiré Kaboré, René Dembélé, Touwendsida Serge Bagré, Ali Konaté, Sylvie Boisramé, Valérie Chevalier, Tarcissus Konsem, Alfred S. Traoré, Nicolas Barro

    Background: This study aimed to characterize and test the antimicrobial susceptibility of Lactococcus lactis isolated in endodontic infections in Burkina Faso. Material and methods: This was a prospective study conducted at the Municipal Oral Health Center of Ouagadougou, Burkina Faso, from June to October 2014. Clinical data were collected using a questionnaire form. The method of streaking on selective medium was used to isolate bacteria. Identification was made using the API 20 Strep gallery. Antibiotic susceptibility was performed by the diffusion method on solid medium. Results: One hundred and twenty-five (125) patients were received with a significant proportion from the age group of 19 to 40 years (55.2%). Apical periodontitis accounted for 50.4% and cellulitis for 49.6% of cases. Lactococcus lactis ssp. lactis was identified in five exudate samples. Isolates were 100% resistant to cefixime and metronidazole, 80% to ceftriaxone, cefuroxime, cefotaxime, chloramphenicol and 60% to penicillin G, amoxicillin, amoxicillin clavulanic acid. A multidrug resistance of more than three families of antibiotics was noticed. No strains produced extended spectrum ß-lactamases. Conclusion: Lactococcus lactis is part of endodontic biofilm. The reported strong antibiotic resistance involving endodontic therapy will focus on the effect of the disinfectant solution and the mechanical action of the canal instruments.

    Microbiologie (bactériologie, virologie)PharmacologieSanté publiqueLicence : http://creativecommons.org/licenses/by/4.0/ Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ().
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  • Article libreArticleEn anglais

    Characterization of a novel Entamoeba histolytica strain from Burkina Faso, Africa, possessing a unique hexokinase-2 gene

    J. Suzuki, S. Kobayashi, M. Imada, M.E. Tolba, T. Takeuchi

    An Entamoeba histolytica strain (BF-841 cl1) that originated from Burkina Faso, Africa presented with novel, polymorphic genotypes of the serine-rich E. histolytica protein and the anodic hexokinase-2 (HXK-2) isoenzyme band, which showed less electrophoretic mobility than that of an E. histolytica reference strain [HM-1:IMSS cl6 (zymodeme (Z)-II)] by starch gel electrophoresis and isoelectric focusing (IEF). The HXK-2 gene of BF-841 cl1 had amino acid variations at four positions compared to the sequence of HM-1: IMSS cl6. These variations were absent from the sequences of four other E. histolytica strains with different zymodemes [KU27 (Z-II), SAW1627 (Z-IIα-), SAW755CR clB (Z-XIV), and KU2 (Z-XIX)]. The results of IEF showed no difference in the substrate specificity of HXK (HXK-1 and HXK-2) between BF-841 cl1 and the three reference E. histolytica strains (HM-1:IMSS cl6, SAW755 clB, and KU27). It was also confirmed that BF-841 cl1 was able to form liver abscesses in Syrian hamsters.

    Biologie cellulaire et moléculaireGénétiqueSanté publiqueLicence : http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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  • Article libreArticleEn anglais

    Characterization of a novel Plasmodium falciparum merozoite surface antigen and potential vaccine target

    Karamoko Niaré, Timothy Chege, Micha Rosenkranz, Kennedy Mwai, Zoe Saßmannshausen, Dennis Odera, Lydia Nyamako, James Tuju, Tiono Alfred, John N. Waitumbi, Bernhards Ogutu, Sodiomon B. Sirima, Gordon Awandare, Bourema Kouriba, Julian C. Rayner, Faith H. A. Osier

    IntroductionDetailed analyses of genetic diversity, antigenic variability, protein localization and immunological responses are vital for the prioritization of novel malaria vaccine candidates. Comprehensive approaches to determine the most appropriate antigen variants needed to provide broad protection are challenging and consequently rarely undertaken.MethodsHere, we characterized PF3D7_1136200, which we named Asparagine-Rich Merozoite Antigen (ARMA) based on the analysis of its sequence, localization and immunogenicity. We analyzed IgG and IgM responses against the common variants of ARMA in independent prospective cohort studies in Burkina Faso (N = 228), Kenya (N = 252) and Mali (N = 195) using a custom microarray, Div-KILCHIP.ResultsWe found a marked population structure between parasites from Africa and Asia. African isolates shared 34 common haplotypes, including a dominant pair although the overall selection pressure was directional (Tajima’s D = -2.57; Fu and Li’s F = -9.69; P < 0.02). ARMA was localized to the merozoite surface, IgG antibodies induced Fc-mediated degranulation of natural killer cells and strongly inhibited parasite growth in vitro. We found profound serological diversity, but IgG and IgM responses were highly correlated and a hierarchical clustering analysis identified only three major serogroups. Protective IgG and IgM antibodies appeared to target both cross-reactive and distinct epitopes across variants. However, combinations of IgG and IgM antibodies against selected variants were associated with complete protection against clinical episodes of malaria.DiscussionOur systematic strategy exploits genomic data to deduce the handful of antigen variants with the strongest potential to induce broad protection and may be broadly applicable to other complex pathogens for which effective vaccines remain elusive.

    Biologie cellulaire et moléculaireGénétiqueBiostatistiques et épidémiologieLicence : This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journa
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  • Article libreArticleEn anglais

    Characterization of Diarrheagenic Escherichia coli Isolated in Organic Waste Products (Cattle Fecal Matter, Manure and, Slurry) from Cattle’s Markets in Ouagadougou, Burkina Faso

    Evariste Bako, Assèta Kagambèga, Kuan Abdoulaye Traore, Touwendsida Serge Bagre, Hadiza Bawa Ibrahim, Soutongnooma Caroline Bouda, Isidore Juste Ouindgueta Bonkoungou, Saidou Kaboré, Cheikna Zongo, Alfred Sababenejo Traore, Nicolas Barro

    Cattle farming can promote diarrheal disease transmission through waste, effluents or cattle fecal matter. The study aims to characterize the diarrheagenic Escherichia coli (DEC) isolated from cattle feces, manure in the composting process and slurry, collected from four cattle markets in Ouagadougou. A total of 585 samples (340 cattle feces, 200 slurries and 45 manures in the composting process) were collected from the four cattle markets between May 2015 and May 2016. A multiplex Polymerase Chain Reaction (PCR), namely 16-plex PCR, was used to screen simultaneously the virulence genes specific for shiga toxin-producing E. coli (STEC), enteropathogenic E. coli (EPEC), enterotoxigenic E. coli (ETEC), enteroinvasive E. coli (EIEC) and enteroaggregative E. coli (EAEC). DEC was detected in 10.76% of samples. ETEC was the most prevalent (9.91%). STEC and EAEC have been observed with the same rate (0.51%). ETEC were detected in 12.64% of cattle feces, in 6.66% of manure in the composting process and in 5% of slurry. STEC were detected in 0.58% of cattle feces and in 2.22% of manure in the composting process. EAEC was detected only in 1% of slurry and in 2.22% of manure in the composting process. ETEC strains were identified based on estIa gene and/or estIb gene and/or elt gene amplification. Of the 58 ETEC, 10.34% contained astA, 17.24% contained elt, 3.44% contained estIa and 79.31% contained estIb. The two positive EAEC strains contained only the aggR gene, and the third was positive only for the pic gene. The results show that effluent from cattle markets could contribute to the spreading of DEC in the environment in Burkina Faso.

    Biologie cellulaire et moléculaireGénétiqueSanté publiqueLicence : http://creativecommons.org/licenses/by/4.0/ Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ().
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  • Article libreArticleEn anglais

    Characterization of factors influencing swarm dynamics and mating efficiency in Anopheles coluzzii

    Tarwendpanga F. X. Ouédraogo, Simon P. Sawadogo, Abdoul Azize Millogo, Abdoulaye Niang, Judicael Ouedraogo, Seydou Bienvenu Ouattara, Antoine cribellier, Moussa Namountougou, Roch K. Dabiré, Florian T. Muijres, Abdoulaye Diabaté

    BackgroundMalaria vectors reproduce through in-flight copulation within swarms, which remains poorly understood. Gaining insights into swarming and mating behavior is essential for optimizing novel vector control strategies including sterile insect technique, genetically modified mosquitoes, and behavior based intervention. This study investigates the factors influencing swarm dynamics and mating efficiency in Anopheles coluzzii.MethodsWe surveyed swarms across 40 residential compounds in Burkina Faso, georeferencing swarming sites and recording swarming times and height. In a subset of three compounds selected for detailed characterization, we also measured inter-swarm distances, counted swarm size from photography, and mating pairs through direct observation during swarming. Furthermore, we collected 30% of male mosquitoes from swarms to measure wing length and perform PCR analyses. We monitored environmental variables including temperature, humidity, wind speed, and luminosity. Finally, we performed spatial and statistical analysis using ArcGIS and R to determine how swarm and mating dynamics are correlated and how they depend on biological and environmental conditions.ResultsWe identified 169 Anopheles coluzzii swarms and found strong evidence of spatial clustering (General G: P < 0.001; Moran’s I = 0.2, P < 0.001), with localized hotspots. Swarming occurred between 18:05 h and 18:45 h, extending into darkness at ~19:15 h. Swarms had an average height of 2.87 m (range: 1.0–3.2 m) and consisted of 83–2783 mosquitoes. Swarm size strongly predicted pairing success in Anopheles coluzzii (t = 9.16, P < 0.001) with larger swarms producing more pairs. However, individual pairing efficiency decreased with swarm size (t = −3.515, P < 0.001). Male size positively influenced individual pairing efficiency (t = 3.25, P = 0.002) but did not affect swarm size or total pairing frequency. Inter-swarm distances varied nonrandomly, suggesting interactions between neighboring and/o

    Biologie cellulaire et moléculaireGénétiqueBiostatistiques et épidémiologieLicence : Open Access http://creativecommons.org/licenses/by/4.0/ http://creativecommons.org/publicdomain/zero/1.0/ This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as
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  • Article libreArticleEn anglais

    Characterization of High-Risk Oncogenic Human Papillomavirus Genotypes in Histologically Confirmed Ear, Nose and Throat (Ent) Cancers in Burkina Faso

    Maïmouna Ilboudo, Théodora Mahoukèdè Zohoncon, Esther Mah Alima Traore, Ina Marie Angèle Traore, Ali Kande, Florencia W Djigma, Dorcas Obiri-Yeboah, Yvette Marie Chantal Gyebre, Jacques Simpore

    Background:High-risk human papillomavirus (HPV-HR) infections are responsible for 99.99% of cervico-uterine cancers and 50% of carcinomas of the oropharynx. Objective:To characterize high-risk HPV genotypes (HPV-HR) in histologically confirmed ear, nose and throat (ENT) cancers in Ouagadougou. Methods:One hundred and twenty-eight archived tissues from the ENT sphere, obtained over the last ten years (2007 to 2017) and histologically diagnosed in anatomy and pathology-cytology laboratories in Ouagadougou were included. These tissues were dewaxed with xylene; HPV DNA extraction was performed and HPV-HR were researched by real-time multiplex PCR. Results:Among the fourteen HPV-HR genotypes tested for, seven were identified. The prevalence of HPV-HR infection was 15.6%. The most common genotypes were: HPV56 (45%) and HPV33 (20%). Squamous cell carcinomas accounted for 75% of cases, followed by lymphomas for 10%. The age range was between 5 and 80 years. Conclusion:The results show the involvement of a diversity of HPV-HR genotypes and a high frequency of HPV56 and HPV33 in ENT cancers in Ouagadougou, Burkina Faso. The appropriate HPV vaccination will considerably reduce the number of these cancers.

    Biologie cellulaire et moléculaireGénétiqueBiostatistiques et épidémiologieLicence : http://creativecommons.org/licenses/by/3.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution License, () which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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  • Article libreArticleEn anglais

    Characterization of strains of Neisseria meningitidis causing meningococcal meningitis in Mozambique, 2014: Implications for vaccination against meningococcal meningitis

    IntroductionIn sub Saharan Africa, the epidemiology, including the distribution of serogroups of strains of N. meningitidis is poorly investigated in countries outside “the meningitis belt”. This study was conducted with the aim to determine the distribution of serogroups of strains of N. meningitidis causing meningococcal meningitis in children and adults in Mozambique.MethodsA total of 106 PCR confirmed Neisseria meningitidis Cerebrospinal Fluid (CSF) samples or isolates were obtained from the biobank of acute bacterial meningitis (ABM) surveillance being implemented by the National Institute of Health, at three central hospitals in Mozambique, from January to December 2014. Serogroups of N. meningitidis were determined using conventional PCR, targeting siaD gene for Neisseria meningitidis. Outer Membrane Proteins (OMP) Genotyping was performed by amplifying porA gene in nine samples.ResultsOf the 106 PCR confirmed Neisseria meningitidis samples, the most frequent serotype was A (50.0%, 53/106), followed by W/Y (18.9%, 20/106), C (8.5%, 9/106), X (7.5%, 8/106) and B (0.9%, 1/106). We found non-groupable strains in a total of 15 (14.2%) samples. PorA genotypes from nine strains showed expected patterns with the exception of two serogroup C strains with P1.19,15,36 and P1.19–36,15 and one serogroup X with P1.19,15,36, variants frequently associated to serogroup B.ConclusionOur data shows that the number of cases of meningococcal meningitis routinely reported in central hospitals in Mozambique is significant and the most dominant serogroup is A. In conclusion, although serogroup A has almost been eliminated from the “meningitis belt”, this serogroup remains a major concern in countries outside the belt such as Mozambique.

    Biologie cellulaire et moléculaireGénétiqueBiostatistiques et épidémiologieLicence : Creative Commons Attribution License This is an open access article distributed under the terms of the, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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  • Article libreArticleEn anglais

    Characterization of Typhoid Intestinal Perforation in Africa: Results From the Severe Typhoid Fever Surveillance in Africa Program

    Megan Birkhold, Shrimati Datta, Gi Deok Pak, Justin Im, Olakayode O Ogundoyin, Dare I Olulana, Taiwo A Lawal, Oludolapo O Afuwape, Aderemi Kehinde, Marie-France Phoba, Gaëlle Nkoji, Abraham Aseffa, Mekonnen Teferi, Biruk Yeshitela, Oluwafemi Popoola, Michael Owusu, Lady Rosny Wandji Nana, Enoch G Cakpo, Moussa Ouedraogo, Edgar Ouangre, Isso Ouedraogo, Anne-Sophie Heroes, Jan Jacobs, Ondari D Mogeni, Andrea Haselbeck, Leah Sukri, Kathleen M Neuzil, Octavie Lunguya Metila, Ellis Owusu-Dabo, Yaw Adu-Sarkodie, Abdramane Soura Bassiahi, Raphaël Rakotozandrindrainy, Iruka N Okeke, Raphaël M Zellweger, Florian Marks

    AbstractBackgroundTyphoid intestinal perforation (TIP) remains the most serious complication of typhoid fever. In many countries, the diagnosis of TIP relies on intraoperative identification, as blood culture and pathology capacity remain limited. As a result, many cases of TIP may not be reported as typhoid. This study demonstrates the burden of TIP in sites in Burkina Faso, Democratic Republic of Congo (DRC), Ethiopia, Ghana, Madagascar, and Nigeria.MethodsPatients with clinical suspicion of nontraumatic intestinal perforation were enrolled and demographic details, clinical findings, surgical records, blood cultures, tissue biopsies, and peritoneal fluid were collected. Participants were then classified as having confirmed TIP, probable TIP, possible TIP, or clinical intestinal perforation based on surgical descriptions and cultures.ResultsA total of 608 participants were investigated for nontraumatic intestinal perforation; 214 (35%) participants had surgically-confirmed TIP and 33 participants (5%) had culture-confirmed typhoid. The overall proportion of blood or surgical site Salmonella enterica subspecies enterica serovar Typhi positivity in surgically verified TIP cases was 10.3%. TIP was high in children aged 5–14 years in DRC, Ghana, and Nigeria. We provide evidence for correlation between monthly case counts of S. Typhi and the occurrence of intestinal perforation.ConclusionsLow S. Typhi culture positivity rates, as well as a lack of blood and tissue culture capability in many regions where typhoid remains endemic, significantly underestimate the true burden of typhoid fever. The occurrence of TIP may indicate underlying typhoid burden, particularly in countries with limited culture capability.

    PédiatrieSanté publiqueLicence : https://creativecommons.org/licenses/by/4.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution License (), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
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    Characterization of vaccine antigens of meningococcal serogroup W isolates from Ghana and Burkina Faso from 2003 to 2009

    Emma Ispasanie, Gerd Pluschke, Abraham Hodgson, Ali Sie, Calman MacLennan, Oliver Koeberling

    Neisseria meningitidis is a major cause of bacterial meningitis and a considerable health problem in the 25 countries of the ‘African Meningitis Belt’ that extends from Senegal in West Africa to Ethiopia in the East. Approximately 80% of cases of meningococcal meningitis in Africa have been caused by strains belonging to capsular serogroup A. After the introduction of a serogroup A conjugate polysaccharide vaccine, MenAfriVac ™, that began in December 2010, the incidence of meningitis due to serogroup A has markedly declined in this region. Currently, serogroup W of N. meningitidis accounts for the majority of cases. Vaccines based on sub-capsular antigens, such as Generalized Modules for Membrane Antigens (GMMA), are under investigation for use in Africa. To analyse the antigenic properties of a serogroup W wave of colonisation and disease, we investigated the molecular diversity of the protein vaccine antigens PorA, Neisserial Adhesin A (NadA), Neisserial heparin-binding antigen (NHBA) and factor H binding protein (fHbp) of 31 invasive and carriage serogroup W isolates collected as part of a longitudinal study from Ghana and Burkina Faso between 2003 and 2009. We found that the isolates all expressed fHbp variant 2 ID 22 or 23, differing from each other by only one amino acid, and a single PorA subtype of P1.5,2. Of the isolates, 49% had a functional nhbA gene and 100% had the nadA allele 3, which contained the insertion sequence IS1301 in five isolates. Of the W isolates tested, 41% had high fHbp expression when compared with a reference serogroup B strain, known to be a high expresser of fHbp variant 2. Our results indicate that in this collection of serogroup W isolates, there is limited antigenic diversification over time of vaccine candidate outer membrane proteins (OMP), thus making them promising candidates for inclusion in a protein-based vaccine against meningococcal meningitis for Africa.

    Biologie cellulaire et moléculaireGénétiqueMicrobiologie (bactériologie, virologie)Licence : This is an open access article distributed under the terms of the Creative Commons Attribution Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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    Characterization of virulence factors of Salmonella isolated from human stools and street food in urban areas of Burkina Faso

    Marguerite E. M. Nikiema, Solange Kakou-ngazoa, Absatou Ky/Ba, Aboubacar Sylla, Evariste Bako, Ameyo Yayra Audrey Addablah, Jean Bienvenue Ouoba, Emmanuel Sampo, Kobo Gnada, Oumarou Zongo, Kuan Abdoulaye Traoré, Adama Sanou, Isidore Juste Ouindgueta Bonkoungou, Rasmata Ouédraogo, Nicolas Barro, Lassana Sangaré

    BackgroundThis study was undertaken to identify and functionally characterize virulence genes from Salmonella isolates in street food and stool cultures. From February 2017 to May 2018, clinical and food Salmonella strains were isolated in three regions in Burkina Faso. Salmonella was serotyped according to the White-Kauffmann-Le Minor method, and polymerase chain reaction (PCR) was used to detec invA, spvR, spvC, fimA and stn virulence genes commonly associated with salmonellosis in Sub-Saharan Africa.ResultsA total of 106 Salmonella isolates (77 human stools; 14 sandwiches) was analyzed using a serological identification with an O-group test reagent. The presence of Salmonella was confirmed in 86% (91/106) of the samples were reactive (OMA-positive/OMB-positive). Salmonella serogroup O:4,5 was the most common serogroup detected (40%; 36/91). Salmonella Enteritidis and Typhimurium represented 5.5% (5/91) and 3.3% (3/91), respectively and were identified only from clinical isolates. Furthermore, 14 serotypes of Salmonella (12/91 human strains and 2/15 sandwich strains) were evocative of Kentucky/Bargny serotype. For the genetic profile, 66% (70/106) of the Salmonella had invA and stn genes; 77.4% (82/106) had the fimA gene. The spvR gene was found in 36.8% (39/106) of the isolates while 48.1% (51/106) had the spvC gene. Among the identified Salmonella Enteritidis and Salmonella Typhimurium isolated from stools, the virulence genes detected were invA (3/5) versus (2/3), fimA (4/5) versus (3/3), stn (3/5) versus (2/3), spvR (4/5) versus (2/3) and spvC (3/5) versus (2/3), respectively.ConclusionThis study reports the prevalence of Salmonella serotypes and virulence genes in clinical isolates and in street foods. It shows that food could be a significant source of Salmonella transmission to humans. Our results could help decision-making by the Burkina Faso health authority in the fight against street food-related diseases, in particular by training restaurateurs in food

    Biologie cellulaire et moléculaireGénétiqueBiostatistiques et épidémiologieLicence : Open Access http://creativecommons.org/licenses/by/4.0/ http://creativecommons.org/publicdomain/zero/1.0/ This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as
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    Characterization of virus species associated with sweetpotato virus diseases in Burkina Faso

    Ezechiel B. Tibiri, Justin S. Pita, Fidèle Tiendrébéogo, Martine Bangratz, James B. Néya, Christophe Brugidou, Koussao Somé, Nicolas Barro

    AbstractSweetpotato (Ipomoea batatas) production in sub‐Saharan Africa is severely affected by viral diseases caused by several interacting viruses, including sweet potato feathery mottle virus (SPFMV), sweet potato chlorotic stunt virus (SPCSV), and sweet potato leaf curl virus (SPLCV). However, the aetiology of viral symptoms on sweetpotato is rarely established in most countries in Africa. Here, we aimed to investigate and characterize the incidence of sweetpotato viruses in Burkina Faso. We performed a countrywide survey in 18 districts of Burkina Faso and collected 600 plants, with and without symptoms, from 80 fields. Viral strains were identified using nitrocellulose membrane‐ELISA, PCR, and reverse transcription‐PCR. Three scions from each of 50 selected plants with symptoms were grafted to healthy Ipomoea setosa and then serological and molecular tests were performed on the 150 recorded samples. Three viruses were detected: 24% of samples were positive for SPFMV, 18% for SPLCV, and 2% for SPCSV. Across all diagnostic tests, 40% of all plant samples were virus‐negative. Coinfections were found in 16% of samples. Partial sequences were obtained, including 13 that matched SPFMV, one that matched SPLCV, and one that matched SPCSV. All identified SPFMV isolates belonged to either phylogroup B or A‐II. The SPCSV‐positive isolates had 98% gene sequence homology with SPCSV‐West Africa for the coat protein. Begomovirus‐positive isolates clustered with SPLCV‐United States. This first study of sweetpotato viral diseases in Burkina Faso indicates widespread occurrence and suggests a need for further epidemiological investigations, breeding programmes focused on virus‐resistant varieties, and improved farming practices to control disease spread. We investigated the viral disease threatening sweetpotato production in Burkina Faso. SPFMV, SPLCV and SPCSV were found; these viruses can occur together with severe symptoms.

    Biologie cellulaire et moléculaireGénétiqueBiostatistiques et épidémiologieLicence : http://creativecommons.org/licenses/by/4.0/ This is an open access article under the terms of theLicense, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
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    Characterizing microbiomes of African fermented foods in a global context

    John Leech, Yemisi D. Obafemi, Samuel Breselge, Taiwo Aremu, Adewale Olusegun Obadina, Martins Ebunoluwa Itohan, Chibundu N. Ezekiel, Charles Parkouda, Abel Tankoano, Korotimi Traoré, Kolawole Banwo, Angela Parry-Hanson Kunadu, Felix Kwashie Madilo, Abiodun I. Sanni, Omotade Richard Ogunremi, Gbemisola Onipede, Damaris Achieng Odeny, Cynthia Otieno, Marcus J. Claesson, Paul D. Cotter

    AbstractFermentation plays a vital role globally, shaping traditional diets and enhancing food preservation, nutrition and flavour. With over 5,000 varieties of fermented foods globally, the microbiomes of many of these have yet to be explored, particularly with respect to those produced in some regions of Africa. To begin to address this knowledge gap, we conducted a shotgun metagenomics-based analysis of 91 fermented foods produced in Burkina Faso, Ghana, Kenya and Nigeria and compared them to a larger, global curated Food Metagenomic Database (cFMD). As for other studies of fermented food microbiomes in general, the substrate that was fermented emerged as the primary determinant of microbial beta diversity within the current African dataset and between the broader cFMD dataset. However, it was notable that the newly studied samples showed a small but statistically significant geographic signal. The African samples also displayed more alpha diversity than the global dataset, with cassava-, seed- and grain-based samples having the highest alpha diversity among the African foods. We also characterized the functional and antimicrobial profiles of all food-derived metagenome-assembled genomes (MAGs), noting the prevalence of pathways associated with carbohydrate metabolism across both African and non-African MAGs and an absence of known antimicrobial resistance genes in numerous genera. These findings not only expand our fundamental understanding of Africa’s under-studied fermented food microbiomes but also lay the foundation for starter culture development tailored to local substrates and conditions, fostering opportunities to enhance product safety, quality and scalability while retaining key characteristics associated with the original, artisanal product.

    Biologie cellulaire et moléculaireGénétiqueBiostatistiques et épidémiologieLicence : This is an open-access article distributed under the terms of the Creative Commons Attribution License. This article was made open access via a Publish and Read agreement between the Microbiology Society and the corresponding author’s institution.
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    Characterizing the HIV risks and potential pathways to HIV infection among transgender women in Côte d'Ivoire, Togo and Burkina Faso

    Shauna Stahlman, Benjamin Liestman, Sosthenes Ketende, Seni Kouanda, Odette Ky-Zerbo, Marcel Lougue, Daouda Diouf, Simplice Anato, Jules Tchalla, Amara Bamba, Fatou Maria Drame, Rebecca Ezouatchi, Abo Kouamé, Stefan D Baral

    IntroductionTransgender women are at high risk for the acquisition and transmission of HIV. However, there are limited empiric data characterizing HIV-related risks among transgender women in sub-Saharan Africa. The objective of these analyses is to determine what factors, including sexual behaviour stigma, condom use and engagement in sex work, contribute to risk for HIV infection among transgender women across three West African nations.MethodsData were collected via respondent-driven sampling from men who have sex with men (MSM) and transgender women during three- to five-month intervals from December 2012 to October 2015 across a total of six study sites in Togo, Burkina Faso and Côte d'Ivoire. During the study visit, participants completed a questionnaire and were tested for HIV. Chi-square tests were used to compare the prevalence of variables of interest between transgender women and MSM. A multilevel generalized structural equation model (GSEM) was used to account for clustering of observations within study sites in the multivariable analysis, as well as to estimate mediated associations between sexual behaviour stigma and HIV infection among transgender women.ResultsIn total, 2456 participants meeting eligibility criteria were recruited, of which 453 individuals identified as being female/transgender. Transgender women were more likely than MSM to report selling sex to a male partner within the past 12 months (p<0.01), to be living with HIV (p<0.01) and to report greater levels of sexual behaviour stigma as compared with MSM (p<0.05). In the GSEM, sexual behaviour stigma from broader social groups was positively associated with condomless anal sex (adjusted odds ratio (AOR)=1.33, 95% confidence interval (CI)=1.09, 1.62) and with selling sex (AOR=1.23, 95% CI=1.02, 1.50). Stigma from family/friends was also associated with selling sex (AOR=1.42, 95% CI=1.13, 1.79), although no significant associations were identified with prevalent HIV infection.ConclusionsT

    Biostatistiques et épidémiologieImmunologieMaladies infectieuses et tropicalesLicence : This is an Open Access article distributed under the terms of the Creative Commons Attribution 3.0 Unported (CC BY 3.0) License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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    Characterizing tuberculosis diagnosis and the associations with economic instability and employment discrimination among women living with HIV across 11 countries in sub‐Saharan Africa: a cross‐sectional study

    Carrie Lyons, Omar Syarif, Pim Looze, Gnilane Turpin, Jean de Dieu Anoubissi, Sophie Brion, Keren Dunaway, Yi‐Chi Chiu, Daria Ocheret, Laurel Sprague, Carlos Garcia de Leon Moreno, Hatim Sati, Amrita Rao, Katherine Rucinski, Stefan Baral, Richard Chaisson, David Dowdy, Chris Beyrer, Becky Genberg

    AbstractIntroductionTuberculosis (TB) is the leading cause of death among people living with HIV. Global estimates among people living with HIV demonstrate that more incident cases and more deaths due to TB occur among women than men. Simultaneously, women experience higher levels of under and unpaid work compared to men. Given that poverty is an established determinant for TB, the aim of this study is to characterize the role of HIV‐related employment discrimination and legal protections on TB outcomes for women living with HIV.MethodsThe People Living with HIV Stigma Index 2.0 study was implemented in 11 countries across sub‐Saharan Africa, including Angola, Benin, Burkina Faso, Cote D'Ivoire, Ghana, Kenya, Mauritania, Nigeria, Lesotho, Togo and Zimbabwe. Study design and implementation were led by networks of people living with HIV in each country between 2020 and 2022. Interviewer‐administered questionnaires were used to collect self‐reported socio‐behavioural measures among cisgender adult women living with HIV. Multilevel logistic regression models were used to estimate associations between economic instability and employment discrimination exposures and recent TB diagnoses in the context of varying discrimination protections for women living with HIV.ResultsAmong 10,718 participants, 7.5% (n = 807) reported a recent TB diagnosis. Among women in countries without non‐discrimination protections, recent TB diagnosis was negatively associated with current employment (aOR: 0.72; 95% CI: 0.62, 0.85) compared to no employment; and positively associated with being refused employment or income due to HIV status (aOR: 1.80; 95% CI: 1.36, 2.39) and ever being refused promotion (aOR: 2.00; 95% CI: 1.37, 2.91) compared to those who have not reported these experiences. Among women in countries with non‐discrimination protections, recent TB diagnosis was associated with lower current employment (aOR: 0.72; 95% CI: 0.56, 0.92) but not associated with employment discriminatio

    Microbiologie (bactériologie, virologie)ImmunologieMaladies infectieuses et tropicalesLicence : http://creativecommons.org/licenses/by/4.0/ This is an open access article under the terms of theLicense, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
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    Check-liste « Développez des pratiques de sauvegarde dans l'équipe »

    Romain David, Shelley Stall, Alison Specht, Margaret O'Brien, Jeaneth Machicao, Pedro Luiz Pizzigatti Corrêa, Rorie Edmunds, Nobuko Miyairi, Yasuhiro Murayama, Solange Santos, Danton Ferreira Vellenich, Kristina Vrouwenvelder, Lesley Wyborn, Laurence Mabile

    Documentez, sélectionnez et archivez les recherches de votre équipe. Comment s'assurer que les fichiers de votre projet disposent d'un plan de sauvegarde efficace. Déterminer les objets numériques à archiver et la documentation correspondante. Déterminer comment rendre vos objets numériques ouverts et FAIR.

    Biostatistiques et épidémiologieImmunologieMaladies infectieuses et tropicalesLicence : https://creativecommons.org/licenses/by/4.0/
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    Check-liste « Outillez votre équipe pour la Science Ouverte »

    Romain David, Shelley Stall, Alison Specht, Margaret O'Brien, Jeaneth Machicao, Pedro Luiz Pizzigatti Corrêa, Rorie Edmunds, Nobuko Miyairi, Yasuhiro Murayama, Solange Santos, Danton Ferreira Vellenich, Kristina Vrouwenvelder, Lesley Wyborn, Laurence Mabile

    Organisez les besoins de votre équipe de recherche en développant des ressources qui garantissent une efficacité, une collaboration et une ouverture optimales. Comment établir des ressources d'équipe communes et un registre d'objets numériques. Comment gérer et suivre les objets numériques de votre équipe. Comment garantir une contribution équitable des membres de l'équipe aux résultats de la recherche et fournir les crédits appropriés.

    Biostatistiques et épidémiologieImmunologieMaladies infectieuses et tropicalesLicence : https://creativecommons.org/licenses/by/4.0/
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    CHECK-LISTE POUR LA DOCUMENTATION ET LA CITATION DES DONNÉES

    Romain David, Solange Santos, Shelley Stall, Alison Specht, Pedro Luiz Pizzigatti Corrêa, Jeaneth Machicao, Nobuko Miyairi, Yasuhiro Murayama, Margaret O'Brien, Lesley Wyborn, Danton Ferreira Vellenich, Laurence Mabile

    <div><p>Bienvenue dans "Votre parcours pour la Science Ouverte"! Planifiez, gérez et partagez vos données. Utilisez cette check-liste pour améliorer vos pratiques de gestion et de partage des données.</p></div>

    Biostatistiques et épidémiologieSanté publiqueLicence : https://creativecommons.org/licenses/by/4.0/
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    Check-liste pour la Documentation et la Citation des Logiciels

    Romain David, Solange Santos, Shelley Stall, Alison Specht, Pedro Luiz Pizzigatti Corrêa, Jeaneth Machicao, Nobuko Miyairi, Yasuhiro Murayama, Margaret O'Brien, Lesley Wyborn, Danton Ferreira Vellenich, Laurence Mabile

    Planifiez, gérez et partagez vos logiciels. Quand et comment gérer vos logiciels pendant votre projet de recherche. Comment archiver et partager la version de votre logiciel utilisée pour votre recherche. Comment citer un logiciel et aider les autres à citer votre logiciel.

    Biostatistiques et épidémiologieImmunologieMaladies infectieuses et tropicalesLicence : https://creativecommons.org/licenses/by/4.0/
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