Prevalence of Escherichia coli O157:H7 in range beef calves at weaning.
W. W. Laegreid, R. O. Elder, J. E. Keen
Citeulike
This study was designed to determine the prevalence of Escherichia coli O157:H7 infection of beef calves at weaning, prior to arrival at the feedlot or mixing with cattle from other sources.
