Journal
BMC INFECTIOUS DISEASES
Volume 19, Issue -, Pages -Publisher
BMC
DOI: 10.1186/s12879-019-3763-3
Keywords
Escherichia coli; ExPEC; Whole-genome sequencing; Multidrug resistance; Extended-spectrum beta-lactamases; Virulence
Categories
Funding
- Belgian Cooperation Agency through the 2012 PIC (Projet Inter-Universitaire de Cooperation) of the ARES (Academie de Recherche et d'Enseignement Superieur) [PIC-MA-353]
- Department Management of Scientific & Technological Research of Defence (IRSD-RSTD
- Royal High Institute for Defence) [MED-20]
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BackgroundExtended-spectrum beta-lactamase (ESBL)-producing Escherichia coli are responsible for severe infections worldwide. Whereas their genotypic and pathogenic characteristics are not documented in Democratic Republic of Congo (DRC), recent studies conducted at the Bukavu General Hospital in the South Kivu province highlighted their high prevalence in extra-intestinal infections. Here we provide data on molecular characterization of ESBL producing-Escherichia coli isolates from patients with extra-intestinal infections at this provincial hospital.MethodsWhole-genome sequencing was carried out on 21 of these ESBL-producing Extra-intestinal Pathogenic Escherichia coli (ExPEC) for analysis of phylogenomic evolution, virulence factor and antimicrobial resistance (AMR) genes. Data were compared to phylogenetically close genomes using Multi-Locus Sequence Typing and Single Nucleotide Polymorphism-based phylogenetic approaches.ResultsThe distribution of E. coli sequence types (ST) was as follows: ST 131 (n=7), ST405 (n=4), ST410 (n=2), and other STs (ST10, ST58, ST95, ST393, ST443, S617, ST648, and ST2450). All ST131 belonged to the O25b-ST131 pandemic clone. Unexpectedly, they harbored more virulence genes than their GenBank counterparts. IncF plasmid replicons included novel FIB 69, FII 105 and FII 107 alleles. ESBL-genes included the plasmid-mediated CTX-M-15 in all isolates, and the SHV-12 allele. Other AMR genes included blaOXA-1, blaTEM-1, as well as genes encoding resistance against aminoglycosides, quinolones, chloramphenicol, rifampicin, tetracyclines, sulfonamides and trimethoprim.ConclusionCurrent data confirm the clonal spread of ESBL-producing ST131 and ST405 clones in patients from South Kivu, and the acquisition of resistance and virulence genes. A closer survey of AMR and virulence should therefore be prompted in this high-risk area.
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