Fluorescein diacetate and rapid molecular testing for the early identification of rifampicin resistance in Mali.

BACKGROUND: Non-conversion on auramine smear microscopy indicates a lack of treatment response, possibly associated with initial rifampicin-resistant tuberculosis (RR-TB). However, dead bacteria still stain positive and may be detected. Fluorescein diacetate smear microscopy (FDA) shows live mycobacteria only. Therefore, we studied the potential of 2-month (2M) FDA for the identification of initial RR-TB.METHODS: Between 2015 and 2018, we enrolled new smear-positive pulmonary TB patients from five local centres in Bamako, Mali. After baseline screening, sputum samples were collected at 1M, 2M, 5M and 18M. We used rpoB sequencing to identify initial RR-TB.RESULTS: Of 1359 patients enrolled, 1019 (75%) had rpoB sequencing results. Twenty-six (2.6%, 95%CI: 1.7-3.7) had mutations conferring rifampicin resistance. Most frequent rpoB mutations were located at the codons Asp435Val (42.4%) and Ser450Leu (34.7%). Among patients with initial RR-TB, 72.2% were FDA-negative at 2M (P = 0.2). The positive and negative predictive value of 5M FDA for culture-based failure was respectively 20.0% and 94.7%.CONCLUSION: FDA did not identify the majority of patients with initial RR-TB or culture-based failure. As the full spectrum of mutations identified on sequencing was identified using Xpert, our data support its rapid universal implementation in Mali.

Diabetes Mellitus among new tuberculosis patients in Bamako, Mali.

INTRODUCTION: Diabetes Mellitus (DM) increases worldwide, mostly in low- and middle-income countries. In Mali, the prevalence in the adult population is estimated at 1.8%, but tuberculosis (TB) patients are not systematically screened. The goal of our study was to determine the prevalence of DM among newly diagnosed TB patients. METHODS: We conducted a cross sectional study and a pilot prospective cohort study in four health centers in Bamako. All patients underwent fasting capillary-blood glucose (FCBG) test at Day 0, and repeated after one-week of TB treatment. Venous FBG test was performed for discrepancies between the two FCBG results. Thereafter, FCBG was performed for pilot study at month-2 (M2) and M5 of TB treatment. RESULTS: Two hundred and one patients were enrolled in this study. Impaired fasting blood glucose was identified in 17 (8.5%), of whom 11 (5.5%) had DM (VFBG >7 mmol/L). Among patients with DM, seven (63.6%) had successful TB treatment outcome, versus 142 (74.7%) of those without DM (p = 0.64), and (OR: 1.69, 95%CI 0.47-6.02). CONCLUSION: The prevalence of DM among TB patients in Bamako exceeds that of the general population and screening at TB diagnosis suffices to identify those with DM. Systematic screening of both diseases will allow better treatment.

Prevalence of extended-spectrum beta-lactamase phenotypes in enterobacteria isolated from blood cultures of patients at admission to the University Hospital of Bamako.

The aim of our study was to determine the frequency of extended-spectrum beta-lactamase (ESBL) phenotypes among the enterobacteria present in blood cultures of patients at admission to two university hospitals of Bamako (Mali). During a period of three months, we isolated enterobacteria from blood cultures from patients upon admission to the Point G and Gabriel Toure University Hospitals. The ESBL-positive enterobacteria were initially identified by API 20E strips and VITEK®2 and then confirmed in France by MALDI-TOF mass spectrometry at the Bichat Hospital bacteriology laboratory. Antibiotic susceptibility was determined by the diffusion method as recommended by EUCAST. The species isolated were K. pneumoniae (14/40, 35.0 %), E. coli (11/40, 27.5 %), and E. cloacae (9/40, 22.5 %); 21/34 (61.8 %) had an ESBL phenotype, including 10/14 (71.4 %) K. pneumoniae, 8/11 (72.7 %) E. coli, and 3/9 (33 3 %), E. cloacae. The ESBL strains of K. pneumoniae, E. coli, and E. cloacae were associated, respectively, with resistance to the following antibiotics: gentamicin (10/10, 100 %; 6/8, 75%; 2/3, 67%), amikacin (2/10, 20 %; 0/8, 0%; 0/3, 0%), ofloxacin (8/10, 80. %; 7/8, 87%; 3/3, 100%), cotrimoxazole (10/10, 100 %; 6/8, 75%; 3/3, 100%). Almost two thirds (61.8%) of the enterobacteria isolated from blood cultures produced extended-spectrum beta-lactamases. They retained regular sensitivity only to carbapenems and amikacin.

[High prevalence of methicillin-resistant Staphylococcus aureus strains in the Point G teaching hospital in Bamako, Mali]. / Haute prevalence des souches de staphylococcus aureus resistantes a la meticilline au centre hospitalier universitaire du Point G a Bamako (Mali).

Our aim was to study the susceptibility of Staphylococcus aureus to antimicrobial agents and to determine the methicillin-resistant S. aureus (MRSA) prevalence in the Point G teaching hospital in Bamako. METHODS: Columbia blood agar with nalidixic acid and colistin was used for the isolation of S. aureus strains. The diffusion method was used for antimicrobial susceptibility testing. RESULTS: Of 434 non repetitive strains of S. aureus isolated from 2007 to 2009 in the Point G teaching hospital, 297 (68.6%) were from hospital area and 137 (31.4%) were from extra-hospital area. The hospital strains were more resistant to penicillin than the extra-hospital strains (95% versus 88%; p = 0,016). Tetracycline was more active against hospital clinical isolates than extra-hospital clinical isolates (32% versus 21%; p = 0.024). Among 297 S. aureus clinical isolates, 195 (66%) were MRSA and 102 (34%) were methicillin-susceptible S. aureus (MSSA). The MRSA clinical isolates prevalence was higher in hospital area than in extra-hospital area (66% versus 55.5%; p = 0.0418). The MRSA clinical isolates prevalence was higher in the medical wards than in the surgical wards (74.8% vs 34.3%; p < 10-6). Among 251 MRSA clinical isolates, 169 (67.3%) were from urine, 39 (15.5%) from pus, 30 (12%) from blood culture, 7 (2.9%) from vagina and 6 (2.5%) from other sites. The MRSA clinical isolates prevalence was 46% in 2007, 63% in 2008 and 80% in 2009. The MRSA clinical isolates were highly more resistant to penicillin (p < 10-6), to amoxicillin combined with clavulanic acid (p < 10-6), to aminoglycosides (p < 10-6), to macrolides, lincosamides and streptogramins (p < 10-6), to norfloxacin (p < 10-6), to chloramphenicol (p < 10-6), to tetracycline (p = 0,0042), to sulfonamides (p < 10-6), to trimethoprim (p < 10-6), to fusidic acid (p < 10-6), and to fosfomycin (p = 0,0103) than the MSSA strains. The high level resistance to aminoglycosides, fluoroquinolones, macrolides, lincosamides and streptogramins was more frequent in the MRSA strains than in the MSSA strains. CONCLUSION: The MRSA clinical isolates prevalence was very high in the Point G teaching hospital in Bamako, in the medical wards especially. The MRSA strains were drugs multiple resistant.

Notre objectif était d'étudier la sensibilité de Staphylococccus aureus aux antibiotiques et de déterminer la prévalence des souches résistantes à la méticilline au centre hospitalier universitaire du Point G à Bamako. MÉTHODES: L'isolement des souches de S. aureus a été réalisé sur la gélose Columbia additionnée de sang de mouton, d'acide nalidixique et de colistine. L'étude de la sensibilité aux antibiotiques a été faite par la méthode des disques. RÉSULTATS: Sur 434 souches non répétitives de S. aureus isolées de 2007 à 2009 au centre hospitalier universitaire du Point G, 297 (68,6 %) sont d'origine hospitalière et 137 (31,4 %) d'origine extrahospitalière. Les souches hospitalières ont été plus résistantes à la pénicilline G que les souches extrahospitalières (95 % versus 88 %; p = 0,016). La résistance de S. aureus à la méticilline (SARM) a été plus fréquente chez les souches hospitalières que chez les souches extrahospitalières (66 % versus 55,5 %; p = 0,0418). Les plus hautes prévalences de SARM ont été observées dans les services de néphrologie (90 %), de cardiologie (87,5 %) de médecine interne (71 %), d'hématologie-oncologie médicale (66 %) et des maladies infectieuses (65 %). La prévalence des souches de SARM a été de 46 % en 2007, 63 % en 2008 et 80 % en 2009 en milieu hospitalier. Les souches de SARM ont été plus résistantes à la pénicilline G (p < 10−6), à l'association amoxicilline + acide clavulanique (p < 10−6), aux aminosides (p < 10−6), aux macrolides, lincosamides et streptogramines (p < 10−6), à la norfloxacine (p < 10−6), au chloramphénicol (p < 10−6), à la tétracycline (p = 0,0042), aux sulfamides (p < 10−6), au triméthoprime (p < 10−6), à l'acide fusidique (p < 10−6), et à la fosfomycine (p = 0,0103) que les souches de S. aureus sensibles à la méticilline (SASM). Les phénotypes de résistance aux aminosides (KTG, S+ KTG) et aux macrolides, lincosamides et streptogramines (MLSB constitutif) ont été plus fréquents chez les souches de SARM que chez celles de SASM. CONCLUSION: La prévalence des souches de SARM a été très élevée au centre hospitalier universitaire du Point G, dans les services de médecine surtout. Les souches de SARM sont multirésistantes.

Prevalence of extended-spectrum beta-lactamase-producing Enterobacteriaceae isolated from blood cultures in Africa.

Extended-spectrum beta-lactamase (ESBL)-producing Enterobacteriaceae have been isolated from many regions of the world. Epidemiological studies are being conducted in Europe, North America, and Asia. No study has however been conducted in Africa to determine the prevalence and distribution of ESBLs on the continent. This literature review aimed at describing the prevalence of ESBL-producing Enterobacteriaceae isolated from blood cultures, as well as the ESBL genes involved at the international level. Our focus was mainly on Africa. We conducted a literature review on PubMed. Articles related to our study field and published between 1996 and 2014 were reviewed and entirely read for most of them, while we only focused on the abstracts of some other articles. Relevant articles to our study were then carefully reviewed and included in the review. The prevalence of ESBL-producing Enterobacteriaceae differs from one country to another. The results of our literature review however indicate that class A ESBLs prevail over the other types. We took into consideration articles focusing on various types of samples to assess the prevalence of ESBL-producing Enterobacteriaceae, but information on isolates from blood cultures is limited. The worldwide prevalence of ESBL-producing Enterobacteriaceae has increased over time. Evidence of ESBL-producing Enterobacteriaceae can be found in all regions of the world. Studies conducted in Africa mainly focused on the Northern and Eastern parts of the continent, while only rare studies were carried out in the rest of the continent.

[Neuromeningeal cryptococcosis in Mali]. / La cryptococcose neuro-méningée au Mali.

Cryptococcal meningitis is the most common fatal central nervous system infection in AIDS patients in Sub-Saharan Africa. The purpose of this prospective study conducted from March 2003 to February 2004 in the internal medicine and infectious diseases departments of the Point G University Hospital Center was to investigate the clinical, prognostic and epidemiological profile of Cryptococcus neoformans infection in patients hospitalized for brain and meningeale infection (BMI). Diagnosis of neuromeningeal cryptococcosis (NMC) was based on positive identification of Cryptococcus by direct exam of the cebrospinal fluid (CSF) after India ink staining and/or culture on Sabouraud medium without actidione. During the study period, a total of 569 patients were hospitalized including 235 (41.3%) with HIV infection. Overall C. neoformans was identified in 14 patients. Median patient age was 39 +/- 8 years. There was a male preponderance with a sex ratio of 1.8 (9 men/5 women). Patients with BMI were HIV-positive in 85.7% of cases (n=12) and HIV-negative in 14.3% (n=2). The overall and HIV-specific prevalence of BMI was 2.5% and 5.1% respectively. The CD4 lymphocyte count was between I and 49 cells/mm3 in 64.3% of cases. The main clinical symptoms were cephalea in 85.7% of cases, altered consciousness in 50% and nausea/vomiting in 35.7%. Neurological manifestations (hemiparesis and cranial nerve deficit) were noted in 14.3%. HIV infection is the main purveyor of NMC in Mali. The actual incidence of cryptococcosis is unclear due to the poor sensitivity of diagnostic techniques. This study highlights diagnostic difficulties related to clinical polymorphism and poor technical facilities. Agglutination testing of blood and CSF is recommended, but mortality remains.

[Neuromeningeal cryptococcosis in non-HIV patients to CHU ward of Point G in Bamako (Mali): 3 case report]. / Cryptococcose neuroméningée chez des patients VIH négatif au CHU du Point G de Bamako (Mali): à propos de trois observations cliniques.

We report 3 clinical observations of neuromeningeal cryptococcosis which occurred without any immunodepression related to HIV infection. Our patients were male. They did not present any particular medical history indicating a diagnosis of cryptococcosis. Nevertheless we found a professional exposure to the risk of inhalation of C. neoformans capsules. The diagnosis was based on presence of encapsulated yeast of Cryptococcus in the direct exam by China ink and culture on Sabouraud medium. CD4 lymphocytic count was done in two patients (case 1:899 cells/mm3; case 2:347 cells/mm3). Idiopathic lymphocytopenia was noted in one case. Co-morbidity of 5. pneumoniae meningitis was reported in one patient (case 3). Treatment was based on injectable amphotericin B in monotherapy (case 1), followed by perfusion of fluconazole cure (case 2). Case 3 was treated by perfusion of amphotericin B associated with ceftriaxone (case 2). No secondary prophylactic treatment was administered. Evolution was favorable after follow-up of 5 years (case 1) and of 4 years (case 2). The third patient died during hospitalization.

[Association of urinary tract infections and HIV infection in an internal medicine ward of Hospital of Point G-Bamako-Mali]. / L'association infection urinairie st infection VIH a dans le service de medicine interne de l'Hopital du Point G-Bamako-Mali.

We gathered 14 clinical observations of urinary track infections in AIDS patients in Internal Medicine wards from August 1, 1998 to July 31, 1999. Urinary track infection and HIV were both present in 1.75% of 797 hospitalized patients. The specific prevalence was 14.43% among AIDS patients. The sex ratio (female/male) was 1.33. The mean age of patients was 37.2 years with ranges between 25 years and 59 years. Urinary symptoms were discret. Urinary tract infection was primarily evidenced by urine leucocytes > 10(4) organism/ml and a bacteriuria > 10(5) colony-forming units/ml. The main pathogenswere Escherichia coli (42.85%), Klebsiella pneumoniae (28.57%), Colibacilles app. (21.42%) and Enterobacter cloacae (7.14%). All isolated germs were sensible to the gentamicin, to the amikacin, to the nalidixic acid, to the cefoxitine, to the ceftazidime to the cefotaxime and the ciprofloxacin. Cephalosporin of 3rd generation, aminoglycosides, and fluoroquinolone can be used like treatment of first line in urinary tract infection suspicion case in Bamako. Our patients were highly immunosuppressed with the majority of them being in class IV C of CDC of Atlanta (90%) and CD4 count constantly bellow 200 cells/mm3. The main opportunistic affections were non bacilar bacterial pneumopathies (28.57%), oesophagal mycosis (71.42%), the association of cerebral toxoplasmosis and pulmonary tuberculosis (35.71%). All urinary infections were cured by mean of 5 days of treatment. Very few recidivism was found (1 case).

[The etiological, clinical and prognosis of diarrhea occurs during AIDS in to hospital in Bamako]. / Aspects sémiologique, étiologique et pronostique de la diarrhée au cours du SIDA en milieu hospitalier de Bamako.

UNLABELLED: Its was a descriptive survey achieved in the service of the infectious and tropical illnesses of the teaching hospital of the "Point G" from 31 December 2002 to 30 June 2004 was about the analysis of 76 files. Its goal was to determine the clinical, etiological and prognostic aspects, of the diarrhea during the AIDS. The oral-pharyngeal candidiasis (50%), the deshydratation (60,5%), the fever (67,5%) and the thinning (77,6%) were associated to the diarrhoea frequently. Cholera syndrome was (52.6%), dysenteric syndrome was (36.8%) and the diarrhea syndrome was (10.5%). According to the etiological aspect, the parasites were founded in 51,3 % of cases, bacteria 9,2 % of cases, and fungus 5,3%. Any pathogen hasn't been founded in 34,2% of cases. Cyptosporidium parvum (15,8 %), and Isospora Belli (11,8%) was the most common parasites founded, but some unusual pathogens as: Entamoeba hystolitica, Trichomonas intestinalis , Giardia intestinalis , Shistosoma mansoni , Dicrococelium dendriticum, Trichostrongylus were present . The most common bacteria were Escherichia coli 5,3%. The fungus family was represented by Candida albicans . The lethality rate was 46,1%. CONCLUSION: The etiology of diarrhea occurs during aids is variable and include opportunistic and non opportunistic. The fatality rate remains incised because the delay of care and the poverty of the patients.

[Factors associated with antiretroviaral treatment observance at Point "G" hospital]. / Les Facteurs associés à l'observance du traitement antirétroviral à l'hôpital du Point G.

OBJECTIVE: To study the factors associated with the observance of treatment ARV among patients followed in hospital medium to Bamako. METHOD: Inquire longitudinal with collection of the data near the patients followed in one of the three greater sites of assumption of responsibility of the people reached with the VIH/SIDA to Mali. The people were regarded as observing if they took at least 95% of their treatment the moment of the investigation. RESULTS: The patients were between 1 and 40 months of treatment the moment of the investigation. The average age was 44 years with extremes going from 19 to 70 years. Association Lamivudine +Stavudine + Nevirapine (triomune) was the most prescribed antiretroviral therapy (34.2%). The bad observance was noted at 58.5% of the patients. The principal causes of bad observance were: the lapse of memory 47.5% (96/202) and difficulties of access to the hospital 34.6% (70/202). The changes of molecules were due primarily to the out-of-stock condition, and the side effects. The factor associated with a good observance was the assistance of the patient by a member of the family informed of seropositivity. CONCLUSION: The interest of HIV patient to his treatment could contribute to enhance antiretroviral Adherence particularly in this hospital and generally in Mali.

[Frequency, risk factors and prognostic value of anemia associated with HIV/AIDS in the adult in Mali]. / Fréquence, facteurs de risque et valeur pronostique de l'anémie associée au VIH/SIDA chez l'adulte au Mali.

Anaemia is a common complication of the HIV infection. To understand the mechanism of HIV associated anaemia and to suggest a consequent therapeutic approach in adults in Mali, we undertook a prospective case/control study in two services of reference with essentially adults recruitment in Bamako. We studied the frequency, the risk factors and the prognosis value of this complication in 133 patients with HIV infection matched to 133 others non HIV infected. The average age of our patients was 36.08 +/- 8.80 years (age range: 19 to 66 years). The frequency of anaemia was significantly higher in patients with HIV infection compared to the controls (78.9% vs. 51.9%; OR = 2.46; 95% CI [1.56-3.92]). Anaemia was more frequent in women than in men (p = 0.00003). A significant association between anaemia and thrombopenia or lymphopenia was observed only in patients with HIV infection. The severity of anemia was positively associated with the HIV2 infection and the progression of the HIV disease. Mortality was more frequently associated to the anaemia (p < 10(-5)) in patients infected by HIV. These findings suggest that bone marrow depression leading to a decreased red blood cells production is the main mechanism of HIV associated anaemia in adult in Mali. Therefore, without evidence of a best cost-effectiveness ratio of a human recombinant erythropoietin treatment in the context of countries with a low income, the therapy of this haematological complication must be an emergency focusing on red blood cells transfusions.

[Gastrointestinal manifestations of AIDS in adults in Mali]. / Manifestations digestives du sida chez l'adulte au Mali.

Our main objective consists in evaluating the frequency of digestive signs and digestive opportunistic infections in AIDS patients with diarrhea. The prospective study occurred from January 1997 to July 1998 in Bamako hospitals. The patients underwent a clinical examination, blood and stools tests, and sometimes upper digestive endoscopy. Among 434 cases of AIDS, 426 patients (98%) had at least one digestive sign. The main digestive signs were diarrhea (80.1%), abdominal pains (62.2%), vomiting (47.2%) and dysphagea (36.6%). Isospora belli and Cryptosporidium parvum have been pointed up in respectively 9% and 16.3% of examined specimen. Echerichia coli was found in 8.6% of stool cultures and in 2.9% in the case of Salmonella Arizonae. Twenty cases of Kaposi's sarcoma were diagnosed and mycosis was found in 71.9% of patients. In conclusion, digestive change is a constant phenomenon in AIDS patients. Patients survival could be improved by early management, improvement of diagnosis and provisioning of medicines.

Les résidus d'antibiotiques dans les effluents hospitaliers de Bamako (Mali)

L'objectif de ce travail était de déterminer la concentration des résidus d'antibiotiques dans les effluents de deux hôpitaux de Bamako. Méthodes : La collecte des échantillons des effluents hospitaliers a été réalisée trois fois par jour à des heures précises : 9 heures, 15 heures et 21 heures conformément au moment des rejets de la station d'épuration, trois jours consécutifs par semaine et pendant un mois. L'analyse des échantillons a été faite par chromatographie phase liquide (HPLC), Agilent 1100 sur colonne C18. La concentration des antibiotiques a été mesurée à l'aide d'un spectrophotomètre UV-Visible Hewlett Packard.Résultats : Quatre antibiotiques ont été détectés et quantifiés dont trois régulièrement dans les effluents hospitaliers. Il s'agit de l'amoxicilline (0,066 ± 0,08 µg/l), l'érythromycine (0,04 ± 0,0 µg/l), sulfaméthoxazole + triméthoprime (0,06 ± 0,21 / 0,08 ± 0,006 µg/l) et du métronidazole (0,02 ± 0,0 µg/l). L'amoxicilline et le sulfaméthoxazole ont été détectés et quantifiés sur les deux points, l'érythromycine et le métronidazole seulement au CHU du Point « G ». Le sulfaméthoxazole a été dosé aux différentes heures dans les effluents des deux hôpitaux, il n'est pas détecté dans les eaux du canal de « Chikoroni ». Le chloramphénicol, la ciprofloxacine et la tétracycline n'ont été détectés à aucun point de prélèvement. Les concentrations d'antibiotiques observées aux différentes heures de prélèvements montrent des pics en général semblables au niveau des différents sites. Conclusion : La qualité de nos effluents n'est pas aussi alarmante. Des mesures doivent être prises en vue de l'évaluation du risque sanitaire et du développement des méthodes nécessaires pour limiter les rejets de résidus médicamenteux dans l'environnement. Mots-clés : résidus d'antibiotiques ; effluents hospitaliers ; Bamako