M. Sanogo

Université des Sciences, des Techniques et des Technologies de Bamako

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Bassirou Diarra

Université des Sciences, des Techniques et des Technologies de Bamako

Bocar Baya

University of Bamako

Souleymane Diallo

Université Nangui Abrogoua

Seydou Doumbia

Université des Sciences, des Techniques et des Technologies de Bamako

Mamoudou Maiga

Université des Sciences, des Techniques et des Technologies de Bamako

Anou M. Somboro

Université des Sciences, des Techniques et des Technologies de Bamako

Yéya dit Sadio Sarro

Université des Sciences, des Techniques et des Technologies de Bamako

Robert L. Murphy

Northwestern University

Bourahima Kone

Université des Sciences, des Techniques et des Technologies de Bamako

Antieme Combo Georges Togo

Université des Sciences, des Techniques et des Technologies de Bamako

Cooperative Institutions

Université des Sciences, des Techniques et des Technologies de Bamako

162

University of Bamako

Mali-Folkecenter

National Institutes of Health

National Institute of Allergy and Infectious Diseases

MRC Unit the Gambia

Centre Pour le Développement des Vaccins-Mali

Centre Hospitalier Universitaire de Yopougon

Ministère de la Santé et de l'Hygiène Publique

Université Félix Houphouët-Boigny

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P118 Survie à long terme des patients diabétiques en Afrique sub-saharienne : caractéristiques épidémiologiques et cliniques d’une cohorte ivoirienne

Diabetes & Metabolism (2014)

A. Diallo J. Abodo M. Diallo K. Dago F. Kouassi

10.1016/s1262-3636(14)72410-3

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Clinical risk factors associated with multidrug-resistant tuberculosis (MDR-TB) in Mali

International Journal of Infectious Diseases (2019)

Bocar Baya Chad J. Achenbach Bourahima Kone Y. Toloba Djénéba Dabitao

MDR-TB is a major threat to global TB control. In 2015, 580,000 were treated for MDR-TB worldwide. The worldwide roll-out of GeneXpert MTB/RIF® has improved diagnosis of MDR-TB; however, in many countries laboratories are unable to assess drug resistance and clinical predictors of MDR-TB could help target suspected patients. In this study, we aimed to determine the clinical factors associated with MDR-TB in Bamako, Mali.We performed a cross-sectional study of 214 patients with presumed MDR-TB admitted to University of Bamako Teaching Hospital, Point-G between 2007 and 2016. We calculated crude and adjusted odds ratios for MDR-TB disease diagnosis using SPSS.We found that age ≤40years (OR=2.56. 95% CI: 1.44-4.55), two courses of prior TB treatment (OR=3.25, 95% CI: 1.44-7.30), TB treatment failure (OR=3.82, 95% CI 1.82-7.79), sputum microscopy with 3+ bacilli load (OR=1.98, 95% CI: 1.13-3.48) and a history of contact with a TB patient (OR=2.48, 95% CI: 1.11-5.50) were significantly associated with confirmation of MDR-TB disease. HIV was not a risk factor for MDR-TB (aOR=0.88, 95% CI: 0.34-1.94).We identified several risk factors that could be used to identify MDR-TB suspects and prioritize them for laboratory confirmation. Prospective studies are needed to understand factors associated with TB incidence and clinical outcomes of TB treatment and disease.

GeneXpert MTB/RIF

10.1016/j.ijid.2019.02.004

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Insuffisance rénale chronique révélée par une goutte polyarticulaire tophacée

NPG. Neurologie, psychiatrie, gériatrie/NPG (2023)

AS Fofana Louncény TRAORE Mamadou Samaké Seydou Sy Hamadoun Yattara

10.1016/j.npg.2023.07.007

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Dynamics of SARS-CoV-2 variants characterized during different COVID-19 waves in Mali

IJID Regions (2022)

A. Koné Dramane Diallo Fousseyni Kané Bassirou Diarra Tenin Aminatou Coulibaly

The emergence of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) variants may have contributed to prolonging the pandemic, and increasing morbidity and mortality related to coronavirus disease 2019 (COVID-19). This article describes the dynamics of circulating SARS-CoV-2 variants identified during the different COVID-19 waves in Mali between April and October 2021.The respiratory SARS-CoV-2 complete spike (S) gene from positive samples was sequenced. Generated sequences were aligned by Variant Reporter v3.0 using the Wuhan-1 strain as the reference. Mutations were noted using the GISAID and Nextclade platforms.Of 16,797 nasopharyngeal swab samples tested, 6.0% (1008/16,797) tested positive for SARS-CoV-2 on quantitative reverse transcription polymerase chain reaction. Of these, 16.07% (162/1008) had a cycle threshold value ≤28 and were amplified and sequenced. The complete S gene sequence was recovered from 80 of 162 (49.8%) samples. Seven distinct variants were identified: Delta (62.5%), Alpha (1.2%), Beta (1.2%), Eta (30.0%), 20B (2.5%), 19B (1.2%) and 20A (1.2%).Several SARS-CoV-2 variants were present during the COVID-19 waves in Mali between April and October 2021. The continued emergence of new variants highlights the need to strengthen local real-time sequencing capacity and genomic surveillance for better and coordinated national responses to SARS-CoV-2.

Coronavirus

Pandemic

2019-20 coronavirus outbreak

10.1016/j.ijregi.2022.11.009

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The emerging threat of pre-extensively drug-resistant tuberculosis in West Africa: preparing for large-scale tuberculosis research and drug resistance surveillance

BMC Medicine (2016)

Florian Gehre Jacob Otu Lindsay Kendall Audrey Forson Awewura Kwara

Drug-resistant tuberculosis (TB) is a global public health problem. Adequate management requires baseline drug-resistance prevalence data. In West Africa, due to a poor laboratory infrastructure and inadequate capacity, such data are scarce. Therefore, the true extent of drug-resistant TB was hitherto undetermined. In 2008, a new research network, the West African Network of Excellence for Tuberculosis, AIDS and Malaria (WANETAM), was founded, comprising nine study sites from eight West African countries (Burkina Faso, The Gambia, Ghana, Guinea-Bissau, Mali, Nigeria, Senegal and Togo). The goal was to establish Good Clinical Laboratory Practice (GCLP) principles and build capacity in standardised smear microscopy and mycobacterial culture across partnering laboratories to generate the first comprehensive West African drug-resistance data. Following GCLP and laboratory training sessions, TB isolates were collected at sentinel referral sites between 2009–2013 and tested for first- and second-line drug resistance. From the analysis of 974 isolates, an unexpectedly high prevalence of multi-drug-resistant (MDR) strains was found in new (6 %) and retreatment patients (35 %) across all sentinel sites, with the highest prevalence amongst retreatment patients in Bamako, Mali (59 %) and the two Nigerian sites in Ibadan and Lagos (39 % and 66 %). In Lagos, MDR is already spreading actively amongst 32 % of new patients. Pre-extensively drug-resistant (pre-XDR) isolates are present in all sites, with Ghana showing the highest proportion (35 % of MDR). In Ghana and Togo, pre-XDR isolates are circulating amongst new patients. West African drug-resistance prevalence poses a previously underestimated, yet serious public health threat, and our estimates obtained differ significantly from previous World Health Organisation (WHO) estimates. Therefore, our data are reshaping current concepts and are essential in informing WHO and public health strategists to implement urgently needed surveillance and control interventions in West Africa.

Extensively drug-resistant tuberculosis

10.1186/s12916-016-0704-5

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Relationship between patient sex and anatomical sites of extrapulmonary tuberculosis in Mali

Journal of Clinical Tuberculosis and Other Mycobacterial Diseases (2023)

Bocar Baya Ibrahim Sanogo Mahamadou Koné D. Soumaré K Ouattara

Contribution of host factors in mediating susceptibility to extrapulmonary tuberculosis is not well understood.

Extrapulmonary tuberculosis

Abdominal Tuberculosis

10.1016/j.jctube.2023.100389

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Diagnostic Performances of Three Rapid Diagnostic Tests for Detecting HIV Infections in Mali.

PubMed (2019)

Bourahima Kone Yéya dit Sadio Sarro Bocar Baya Djénéba Dabitao Nadie Coulibaly

Diagnosis of HIV infections in resource-limited countries like Mali is based on Rapid Diagnostic Tests (RDTs). The RDTs are diagnostic assays designed for use at the Point-Of-Care (POC), which is quick, cost-effective and easy to perform. However, in these countries, the tests are commonly used without any initial evaluation or monitoring of their performance despite high levels of HIV strain diversity and rapid evolution of the virus. In this study, the reliability and accuracy of HIV RDTs (Determine™, Multispot™, SD Bioline™) used in Mali, where HIV-1 and HIV-2 co-exist, were evaluated from August 2004 to November 2017. A total of 1303 samples from new HIV-suspect patients in Bamako were tested for HIV-1 and HIV-2 using the RDT Determine™, followed by ELISA and Western Blot (WB). The Determine™ test showed a robust diagnostic sensitivity of 98.7% [CI 95: 97.59-99.37] and a diagnostic specificity of 99.2% [CI 95: 98.22-99.67]. The Multispot™ assay showed a diagnostic sensitivity of 98.77% [CI 95: 97.59-99.37] and a diagnostic specificity of 99.2% [CI 95: 98.22-99.67]. The diagnostic sensitivity and specificity of SD Bioline™ HIV-1/2 were 100% [CI 95:72.25-100] and 88.89% [CI 95: 56.50- 98.71], respectively. These data indicate excellent performance for HIV RDTs in Mali and we recommend the use of Determine™ HIV-1/2 for HIV screening and Multispot™ for discriminating HIV-2 from HIV-1 infections.

HIV diagnosis

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Sex Differences in Active Pulmonary Tuberculosis Outcomes in Mali, West Africa

American Journal of Tropical Medicine and Hygiene (2022)

Djénéba Dabitao Anou M. Somboro Ibrahim Sanogo Bassirou Diarra Chad J. Achenbach

Men and women often respond differently to infectious diseases and their treatments. Tuberculosis (TB) is a life-threatening communicable disease that affects more men than women globally. Whether male sex is an independent risk factor for unfavorable TB outcomes, however, has not been rigorously investigated in an African context, where individuals are likely exposed to different microbial and environmental factors. We analyzed data collected from a cohort study in Mali by focusing on newly diagnosed active pulmonary TB individuals who were treatment naive. We gathered baseline demographic, clinical, and microbiologic characteristics before treatment initiation and also at three time points during treatment. More males than females were affected with TB, as evidenced by a male-to-female ratio of 2.4:1. In addition, at baseline, males had a significantly higher bacterial count and shorter time to culture positivity as compared with females. Male sex was associated with lower smear negativity rate after 2 months of treatment also known as the intensive phase of treatment, but not at later time points. There was no relationship between patients' sex and mortality from any cause during treatment. This study suggests that sex-based differences in TB outcomes exist, with sex-specific effects on disease outcomes being more pronounced before treatment initiation and during the intensive phase of treatment rather than at later phases of treatment.

Female sex

10.4269/ajtmh.21-1141

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Citations (4)

Comparing accuracy of lipoarabinomannan urine tests for diagnosis of pulmonary tuberculosis in children from four African countries: a cross-sectional study

The Lancet Infectious Diseases (2020)

Esin Nkereuwem Toyin Togun Marie P. Gomez Rita Székely Aurélien Macé

Lipoarabinomannan

Cross-sectional study

10.1016/s1473-3099(20)30598-3

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Citations (33)

Tuberculose et diabète à Bamako, Mali : prévalence et caractéristiques épidémiocliniques de l'association

DOAJ (DOAJ: Directory of Open Access Journals) (2014)

Boubacar Diarra Alpha Diallo Mamoudou Maiga M. Sanogo M. Mamadou Diallo

Introduction and Methods: In Mali studies on Tuberculosis and Diabetis association are rare and partial. Because of the severity and complexity of its management, we undertake a retrospective study from January 1993 to December 2009 to estimate the prevalence of the association and to determine its epidemiological characteristics in Bamako, Mali. Results: Among the 2,110 diabetic cases notified at the different centers during the 17 years, 120 patients developed tuberculosis, with a prevalence of 5.7%. The sex ratio was 1.6. The age group 50-59 years old was the most represented with a mean age of 52.4 + / -13.5 years and extremes ranging from 7 to 83 years old. The prevalence of Human Immunodeficiency Virus (HIV) was 5%. Type 2 Diabetes was encountered in most patients up to 77.5%. Tuberculosis (TB) was at pulmonary location (PT) in 80 cases (66.7%), extrapulmonary (EPT) in 33 cases (27.5%), and 7 cases were disseminated to both places. The most widely means used for the diagnosis of TB was the combination of clinical, radiological, and therapeutic test for TB. At the end of treatment 84.2% of the patients presented complications related to diabetes, 17.5% related to TB, and 20% of deaths. Conclusion: TB and Diabetes association is not rare in Bamako, reaching up to 5.6%. The dual infection with HIV was present up to 5%, and this dual infection was completely lethal. The prognosis of TB and Diabetes association is poor with 20% death.

10.53597/remim.vi2.364

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Citations (2)