F18:A-:B1 Plasmids Carrying bla_CTX-M-55 Are Prevalent among Escherichia coli Isolated from Duck-Fish Polyculture Farms.

ABSTRACT: We determined the prevalence and molecular characteristics of bla_CTX-M-55-positive Escherichia coli (E. coli) isolated from duck-fish polyculture farms in Guangzhou, China. A total of 914 E. coli strains were isolated from 2008 duck and environmental samples (water, soil and plants) collected from four duck fish polyculture farms between 2017 and 2019. Among them, 196 strains were CTX-M-1G-positive strains by PCR, and 177 (90%) bla_CTX-M-1G-producing strains were bla_CTX-M-55-positive. MIC results showed that the 177 bla_CTX-M-55-positive strains were highly resistant to ciprofloxacin, ceftiofur and florfenicol, with antibiotic resistance rates above 95%. Among the 177 strains, 37 strains carrying the

SUBMITTER: Zhang LJ 

PROVIDER: S-EPMC10295773 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature