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.

[HIV/TB co-infection in rural settings of Benin: case of the Djougou-Ouake-Copargo sanitary district (north-west Benin)]

AIMS

we measured the burden of TB/HIV co-infection in a rural setting of Benin, and assessed the outcome of tuberculosis treatment at the end of the intensive phase of TB treatment.

METHODS

This is a retrospective, cross-sectional, descriptive study, covering January 2006 to December 2011.

RESULTS

A total of 256 patients were included, 67 (26.1%) were HIV +. A minority, 25% of co-infected HIV / PTB, had TB bacilli high density (+++) versus 45% of mono-infected (P = 0.005). The smear conversion was obtained in 96% of coinfected versus 93% in HIV- at the end of the intensive phase (P = 0.5). The cure rate was 86% and 93.1% respectively in co-infected and HIV-. A proportion of 13.5% of co-infected died versus 3% in HIV- (P = 0.005). 21% of co-infected with CD4 <200 died versus 3.6% of those with CD4> 200 (P = 0.041).

CONCLUSION

This work underlines the high prevalence of HIV / TB co-infection in this region. Co-infected patients respond well to treatment, but their mortality is high when they are very immunocompromised.

High level of HIV-1 resistance in patients failing long-term first-line antiretroviral therapy in Mali

OBJECTIVES

In resource-limited settings, few data are available on virological failure after long-term first-line antiretroviral therapy. This study characterized the genotypic resistance patterns at the time of failure after at least 36 months of a first-line regimen in Mali, West Africa.

METHODS

Plasma samples from 84 patients who were receiving first-line antiretroviral treatment and with an HIV-1 RNA viral load (VL) >1000 copies/mL were analysed. Genotypic resistance testing was performed and HIV-1 drug resistance was interpreted according to the latest version of the National Agency for HIV and Hepatitis Research algorithm.

RESULTS

At the time of resistance testing, patients had been treated for a median of 60 months (IQR 36-132 months) and had a median CD4 cell count of 292 cells/mm(3) (IQR 6-1319 cells/mm(3)), a median HIV-1 RNA level of 28266 copies/mL (IQR 1000-2 93 495 copies/mL) and a median genotypic susceptibility score of 1 (IQR 1-4). The prevalence of nucleoside reverse transcriptase inhibitor (NRTI) and non-nucleoside reverse transcriptase inhibitor (NNRTI) resistance mutations was 78% and 82%, respectively. Viruses were resistant to at least one drug in 92% of cases. Although etravirine and rilpivirine were not used in the first-line regimens, viruses were resistant to etravirine in 34% of cases and to rilpivirine in 49% of cases. The treatment duration, median number of NRTI and NNRTI mutations and some reverse transcriptase mutations (T215Y/F/N, L210W, L74I, M41L and H221Y) were associated with the VL at virological failure.

CONCLUSIONS

This study demonstrated a high level of resistance to NRTIs and NNRTIs, compromising second-generation NNRTIs, for patients who stayed on long-term first-line regimens. It is crucial to expand the accessibility of virological testing in resource-limited settings to limit the expansion of resistance and preserve second-line treatment efficacy.

[HIV/TB co-infection in rural settings of benin: case of Djougou-Ouake-Copargo district (north-west Benin]

AIMS

We measured the burden of HIV/tuberculosis (HIV/TB) co-infection in people infected by TB in rural settings of Benin, and assessed the outcome of TB treatment at the end of the intensive phase.

METHODS

This is a retrospective, cross-sectional, descriptive study, covering January 2006 to December 2011.

RESULTS

A total of 256 patients were gathered, 67 (26.1%) were HIV +. A proportion of 25% of co-infected HIV / PTB had TB bacilli high density (+++) versus 45% of mono-infected (P = 0.005). The smear conversion was obtained in 96% of coinfected versus 93% in HIV- at the end of the intensive phase (P = 0.5). The cure rate was 86% and 93.1% respectively in co-infected and HIV-. A proportion of 13.5% of co-infected died versus 3% in HIV- (P = 0.005). 21% of co-infected with CD4 <200 died versus 3.6% of those with CD4> 200 (P = 0.041).

CONCLUSION

This work underlines the high prevalence of HIV / TB co-infection in this region. Co-infected patients respond well to treatment, but their mortality is high when they are very immunocopromissed.