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  • Title: The emergence of colistin-resistant Escherichia coli in chicken meats in Nepal.
    Author: Joshi PR, Thummeepak R, Leungtongkam U, Pooarlai R, Paudel S, Acharya M, Dhital S, Sitthisak S.
    Journal: FEMS Microbiol Lett; 2019 Oct 01; 366(20):. PubMed ID: 31755930.
    Abstract:
    The emergence and dissemination of colistin resistance among Gram-negative bacteria is a global problem. We initiated a surveillance of colistin-resistant and -susceptible Escherichia coli in raw meats from chicken in Nepal. A total of 180 meat samples were collected; from these, 60 E. coli strains were isolated (33.33%), of which 16 (26.66%) were colistin-resistant and harboured the mcr-1 gene. All isolates were characterised by antibiotic susceptibility testing, the presence of antibiotic resistance genes, phylogenetic analysis and plasmid replicon typing. Most of the colistin-resistant E. coli had the antibiotic resistant pattern CIP/CN/SXT/TE (43.75%). Coexistence of tet, qnr, sul and dfr genes was detected in both colistin-resistant and -susceptible E. coli. Most colistin-resistant E. coli strains belonged to phylogroup C, whereas 10% of isolates belonged to phylogroup D. Inc FIB was the dominant plasmid Inc type in the isolates. Dissemination of antibiotic-resistant E. coli in raw meats is a public health concern in Nepal and requires further investigation to ascertain the sources of contamination.
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