Survey and Sequence Characterization of Bovine Mastitis-Associated Escherichia coli in Dairy Herds.

ABSTRACT: Escherichia coli is frequently associated with mastitis in cattle. "Pathogenic" and "commensal" isolates appear to be genetically similar. With a few exceptions, no notable genotypic differences have been found between commensal and mastitis-associated E. coli. In this study, 24 E. coli strains were isolated from dairy cows with clinical mastitis in three geographic regions of Australia (North Queensland, South Queensland, and Victoria), sequenced, then genomically surveyed. There was no observed relationship between sequence type (ST) and region (p = 0.51). The most common Multi Locus Sequence Type was ST10 (38%), then ST4429 (13%). Pangenomic analysis revealed a soft-core genome of 3,463 genes, including genes associated with antibiotic resistance, chemotaxis,

SUBMITTER: Alawneh JI 

PROVIDER: S-EPMC7750360 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature