Surveys of Salmonella enteritidis in Unpasteurized Liquid Egg and Spent Hens at Slaughter.

In a 1995 national survey of 937 unpasteurized liquid egg samples collected in breaker plants, 179 of 937 samples (19%) were Salmonella enterica serotype Enteritidis ( S. Enteritidis ) positive. The proportion of unpasteurized liquid egg samples positive for S.

Epidemiology of Escherichia coli O157 in Feedlot Cattle.

Fecal samples from cattle in 100 feedlots in 13 states were bacteriologically cultured for Escherichia coli O157 that did not ferment sorbitol, lacked beta-glucuronidase, and possessed genes coding for Shiga-like toxin. In each feedlot 30 fresh fecal-pat samples were collected from each of four pens: with the cattle shortest on feed, with cattle longest on feed, and with cattle in two randomly selected pens. E.

Factors Associated with the Presence of Escherichia coli O157 in Feces of Feedlot Cattle.

Fecal samples were collected from pens of cattle in a total of 100 feedlots in 13 states. Fecal samples were cultured for Escherichia coli O157. E.