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-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]

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.

[The etiological, clinical and prognosis of diarrhea occurs during AIDS in to hospital in Bamako]

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]

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.

[Association of urinary tract infections and HIV infection in an internal medicine ward of Hospital of 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).

[Gastrointestinal manifestations of AIDS in adults in 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.