The Spring sampling exhibited the highest number of LM isolates (37), followed by Winter (31), Summer (11) and Fall (8). Swine farms exhibited the highest number of LM isolates (27), followed by dairy cattle farms (26), poultry farms (24) and beef cattle farms (18). LM was isolated from 8.25% of all samples. coli O:157 in swine and turkey was surprisingly high which indicates that swine and poultry may serve as vectors for foodborne outbreaks of E. coli O:157 at the farm should focus on the feces or fecal swabs for optimal coli O157:H7 were seldom isolated from feeds or bedding, sampling for E. coli O157:H7 was isolated from feed samples (up to 3 samples) from the states of Tennessee and Washington. coli O157:H7 was isolated infrequently from environmental samples (1-3%). coli O157:H7 was positive (latex agglutination confirmed) in 6% of beef cattle (n = 328), 5% of dairy cattle (n=328), 9% of swine (n=326), 5% of turkey (n=80) and 1% of chickens (n= 224). were collected over 16 months for each of the enteric microorganism and LM. Environmental samples (n=648) and fecal swab samples (n=328) from 16 farm locations in the U.S. Progress 09/15/01 to 09/14/05 Outputs The objective of this study was to determine incidence and gather epidemiological information to determine occurrence of Escherichia coli O157:H7, Listeria monocytogenes (LM) and Salmonella in cattle, swine and poultry and the farm environment.
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