News sequences types of Staphylococcus aureus isolated from human pathologicals fluids in Burkina Faso.

Staphylococcus aureus is a pathogen with high epidemic potential frequently involved in nosocomials and communities infections. The pathogenicity of Staphylococcus aureus is due to both its ability to resist antibiotics and to Produce toxins. This work aims at studying the resistance and Molecular Epidemiology of Staphylococcus aureus. Antibiotic susceptibility of the 70 strains isolates of Staphylococcus aureus was determined by agar diffusion while Multiplex PCR and MLST were used to search toxin-coding genes and MRSA typing, respectively. 14.28% of isolates were multidrug resistant. Staphylococcus aureus showed high susceptibility to aminoglycoside and Macrolides familly. lukS-PV/lukF-PV and sea genes were detected in 45% and 3% of Staphylococcus aureus respectively. Ten (10) sequence types including ST5710, ST2430, ST5289, ST5786, ST6942, ST6943, ST6944, ST6945, ST6946, ST6947 have been reported. The study showed a diversity of antibiotic resistance phenotypes and a great diversity of MRSA clones causing infections.

Emergence of New Delhi Metallo-ß-Lactamase (NDM) Genes Detected from Clinical Strains of Escherichia coli Isolated in Ouagadougou, Burkina Faso.

The emergence and spread of carbapenem resistance in Gram-negative bacilli such as Klebsiella pneumoniae, Escherichia coli, Acinetobacter baumannii, and Pseudomonas aeruginosa through the production of carbapenemases is a global phenomenon. It threatens patient care and leads to therapeutic impasses. This study aims to genotypically determine the prevalence of the most frequent carbapenemase genes among multidrug-resistant E. coli strains isolated from patients at a biomedical analysis laboratory. A total of fifty-three unduplicated E. coli strains isolated from patient samples with a multidrug-resistant (MDR) profile were subjected to polymerase chain reaction (PCR) testing for carbapenem resistance genes. This study allowed us to identify fifteen strains carrying resistance genes among the fifty-three E. coli strains. All fifteen strains produced the metallo-ß-lactamase enzymes; this represents a rate of 28.30% of study strains. Among these strains, ten carried the NDM resistance gene, NDM and VIM genes were detected in three strains and VIM was identified in two strains of E. coli. However, carbapenemases A (KPC and IMI), D (OXA-48), and IMP were not detected in the strains studied. Thus, NDM and VIM are the main carbapenemases detected in the strains in our study.

Research of Antibiotic Residues and Bacterial Strain's Antibiotic Resistance Profile in the Liquid Effluents Evacuated in Nature by Two CHUs and a Mixed WWTP of Ouagadougou (Burkina Faso).

Background: In Burkina Faso, suspicions have been raised that hospital liquid effluents are a source of microbiological contaminants in surface waters of urban and peri-urban areas. This study aimed to determine the antibiotic residues and the antibiotic resistance phenotype of potential pathogenic bacteria in the hospital liquid effluents discharged into nature by the CHUs Bogodogo, Yalgado Ouédraogo and the WWTS of Kossodo. Methods: Fifteen samples of liquid effluents discharged into nature were collected. Antibiotic residues were identified by HPLC. A wavelength of 254 nm for the UV detector was set. Antibiotic testing was realized according to CASFM 2019 recommendations. Results: Three molecules including Amoxicillin, Chloramphenicol and Ceftriaxone were detected in 13 samples. The strains characterized were 06 E. coli, 09 Pseudomonas spp, 05 Staphylococcus aureus and 04 Salmonella spp. Thus, none of the strains was resistant to Imipenem, but they were resistant to Amoxiclav with rates of 83.33% (E. coli), 88.88% (Pseudomonas spp) and 100% (Staphylococcus aureus and Salmonella spp). Conclusion: Ouagadougou hospital liquid effluents discharged into nature are contaminated with antibiotic residues and potential pathogenic bacteria.

(GTG)5-PCR fingerprinting of multi-drug resistant Escherichia coli bacteria isolates from hospital in Ouagadougou, Burkina Faso.

BACKGROUND: Escherichia coli (E. coli) is the most common bacterial species implicated in various types of infections including septicemia, gastroenteritis, urinary tract infections, meningitis and others pathologies. These involve several bacterial clones with multidrug resistance making them difficult to treat. The aims of this study was to perform molecular typing of E. coli strains using universal primer (GTG)5. In this study, 53 E. coli strains were collected from inpatients and outpatients. The test of antimicrobial sensibility was realized using CA-SFM /EUCAST method and strains were identified by conventional microbiological tests. The carbapenemase-producing strains were demonstrated by phenotypic method. Bacterial DNA was extracted by boiling method. (GTG)5-PCR was used for strain subtyping. The DendroUPGMA software was used for grouping of strains from the genetic fingerprints obtained by (GTG)5-PCR. RESULTS: Antibiotic susceptibility test revealed that all strains were multi-drug resistant (MDR). Its strains showed resistance to at least three different families of antibiotics. Of this MDR strains, only one was a metallo-ß-lactamase producer. The dendrogram obtained using genetic fingerprinting allowed the E. coli strains to be grouped into 22 clusters (G1 to G22). CONCLUSION: The (GTG) 5-PCR assay enabled rapid molecular typing of E. coli strains. The strains of E. coli typed in this study would belong to different clones.