We found the overall fecal prevalence of E. coli O157:H7
and prevalence of high shedders in this large commercial feedlot population were relatively high as expected for summer-fed
cattle supplemented with distiller’s grains. We conclude that
this DFM, Bovamine®
(labeled for 10
6
CFU/head/day of Lactobacillus), administered alone or in combination with the SRP®
vaccine, does not significantly affect fecal shedding. However,
the SRP®
vaccine significantly reduces fecal prevalence of E. coli
O157:H7 and prevalence of high shedders, and therefore may be
an effective intervention for E. coli O157:H7 control in commercial
feedlot