Abstract
Atypical enteropathogenic Escherichia coli (aEPEC) are associated with diarrhea worldwide, yet genome-wide investigations to probe their virulome are lacking. In this issue of Infection and Immunity, V. E. Watson, T. H. Hazen, D. A. Rasko, M. E. Jacob, et al. (IAI 89:e00619-20, 2020, https://doi.org/10.1128/IAI.00619-20) sequenced aEPEC isolates from diarrheic and asymptomatic kittens. Using phylogenomics, they demonstrated that these isolates were genetically indistinguishable from human isolates, suggesting that kittens may serve as a reservoir and, perhaps, a much-needed model to interrogate aEPEC virulence. The diarrheic isolates were hypermotile, suggesting that this phenotype may distinguish virulent strains from their innocuous counterparts.
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