Understanding the transmission dynamics of Escherichia coli O157:H7 super-shedding infections in feedlot cattle.

ABSTRACT:

Background

The presence of Escherichia coli O157:H7 (E. coli O157:H7) super-shedding cattle in feedlots has the potential to increase the overall number (bio-burden) of E. coli O157:H7 in the environment. It is important to identify factors to reduce the bio-burden of E. coli O157 in feedlots by clarifying practices associated with the occurrence of super-shedders in feedlot cattle.

Methods

The objective of this study is to (1) identify host, pathogen, and management risk factors associated with naturally infected feedlot cattle excreting high concentrations of E. coli O157:H7 in their feces and (2) to determine whether the ingested dose or the specific strain of E. coli O157:H7 influences a super-shedder infection within experimenta

SUBMITTER: Antaki-Zukoski EM 

PROVIDER: S-EPMC8697766 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature