Influence of toxic enophyte-infected tall fescue on the prevalence of E. coli 0157:H7 from ruminants, a review
| Autor: | M.L. Looper, T.S. Edrington, T.R. Callaway, R. Flores, G.E. Aiken, J.M. Burke, C.F. Rosenkrans, J.R. Author |
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| Rok vydání: | 2007 |
| Předmět: | |
| Zdroj: | NZGA: Research and Practice Series. 13:87-89 |
| ISSN: | 2463-4751 0110-8581 |
| Popis: | Ruminants consuming toxic endophyte-infected (E+) tall fescue are exposed to ergot alkaloids that usually result in a malady of problems identified as fescue toxicosis. Grazing studies investigating the effects of E+ tall fescue on the prevalence of E. coli O157:H7 from naturally-infected cattle have not been consistent. Further, in vitro studies with selected ergot alkaloids did not affect growth of E. coli O157:H7. Dietary stressors usually associated with E+ tall fescue consumption did result in increased faecal shedding of E. coli O157:H7 from sheep experimentally-inoculated. Animal species, animal model (naturally vs experimentally-infected), environmental conditions, type of diet, and length of exposure to E+ tall fescue may influence the association between grazing E+ tall fescue and E. coli O157:H7 shedding. A better understanding of how E+ tall fescue influences shedding of E. coli O157:H7 from ruminants will aid in the development of management strategies for onfarm pathogen control. Keywords: cattle, E. coli O157:H7, sheep, tall fescue |
| Databáze: | OpenAIRE |
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