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J Appl Microbiol ; 134(12)2023 Dec 01.
Article in English | MEDLINE | ID: mdl-38086616

ABSTRACT

AIMS: We investigate extraintestinal pathogenic genes (ExPEC) related to virulence of Escherichia coli in flies from the dairy environment. METHODS AND RESULTS: We collected 217 flies from nine dairy farms, which were submitted to microbiological culture. Fifty-one E. coli were identified using mass spectrometry. Eleven dipteran families were identified, with a predominance of Muscidae, and a minor frequency of Tachinidae, Drosophilidae, Sphaeroceridae, Ulidiidae, Syrphidae, Chloropidae, Calliphoridae, Sarcophagidae, and Piophilidae. A panel of 16 virulence-encoding genes related to ExPEC infections were investigated, which revealed predominance of serum resistance (traT, 31/51 = 60.8%; ompT, 29/51 = 56.9%), iron uptake (irp2, 17/51 = 33.3%, iucD 11/51 = 21.6%), and adhesins (papC, 6/51 = 11.8%; papA, 5/51 = 9.8%). CONCLUSIONS: Our findings reveal Dipterans from milking environment carrying ExPEC virulence-encoding genes also identified in clinical bovine E. coli-induced infections.


Subject(s)
Diptera , Escherichia coli Infections , Extraintestinal Pathogenic Escherichia coli , Humans , Animals , Cattle , Escherichia coli/genetics , Virulence/genetics , Farms , Escherichia coli Infections/veterinary , Escherichia coli Infections/microbiology , Virulence Factors/genetics , Insecta
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