Journal
POULTRY SCIENCE
Volume 95, Issue 12, Pages 2895-2901Publisher
OXFORD UNIV PRESS
DOI: 10.3382/ps/pew252
Keywords
phylogenetic group; biofilm-forming ability; antibiotics resistance; adherence gene; Escherichia coli
Categories
Funding
- National Natural Science Foundation of China - Program for Science & Technology Innovation Talents in Universities of Henan Province [31201910, 31540095, 14HASTIT024]
- Science and Technology development project of Henan Province [142102310297]
- Science and Technology Research Foundation of Henan Province Educational Committee [13A230261, 14A230003]
- Henan University of Science and Technology Innovation Team
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The isolation and identification, genetic typing, antibiotic sensitivity, and biofilm formation of avian Escherichia coli in central China was studied. A total of 256 isolates of E. coli were obtained, and classified into groups: A (50.78%, 130/256), B1 (11.72%, 30/256), B2 (17.58%, 45/256), and D (19.92%, 51/256). Drug susceptibility testing revealed that the strains showed a high drug resistance rate against penicillin, aztreonam, rifampicin, kanamycin, clindamycin, and gentamicin, with 92.19% of strains exhibiting multidrug resistance. A biofilm assay revealed that 81.64% of isolates could form biofilms. Of the total isolates, 25.39% of isolates showed strong biofilm-formation ability, 31.25% showed moderate biofilm-formation ability, 28.90% showed weak biofilm-formation ability, and 18.36% were unable to form biofilms. Most adhesion-associated genes were distributed among 5 or 8 genes in strong biofilm-forming ability isolates. However, adhesion-associated genes distributed among 1 or 4 genes were found in weak biofilm-forming ability isolates and non-ability isolates. The results showed a high drug resistance rate and biofilm formation ability in E. coli strains isolated from poultry. The isolates which have strong biofilm-forming ability were mostly belong to pathogenic E. coli (B2, D). Furthermore, it was the first report to demonstrate a positive correlation between adhesion-encoding genes and biofilms phenotype.
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