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Outbreak of Clinical Listeriosis in Sheep: Evaluation from possible Contamination Routes from Feed to Raw Produce and Humans by M. Wagner; D. Melzner; Z. Bagò; P. Winter; M. Egerbacher; F. Schilcher; A. Zangana; D. Schoder is a Agricultural and Biological Sciences article available to read on EtoBox.
What is Outbreak of Clinical Listeriosis in Sheep: Evaluation from possible Contamination Routes from Feed to Raw Produce and Humans about?
## Summary We report the results of clinical and microbiological investigations on __Listeria monocytogenes__ infections in a flock of 55 sheep and describe the implications for the safety of the raw milk and raw‐milk cheeses produced in the on‐farm dairy. The outbreak was caused by feeding grass silage, which was contaminated with 5 log~10~ CFU __L. monocytogenes__/g. Clinically, although having been fed from the same batch of silage, abortive (nine ewes), encephalitic (one ewe) and septicaemic (four ewes) forms of listeriosis were observed during the outbreak phase. As the starting point of feeding the contaminated silage was known we could calculate an incubation period of 18 ± 2 and 26 days for the abortive and the encephalitic form of listeriosis, respectively. Pathologically, the septicaemic cases suffered from __Listeria__ accumulation at comparable numbers in visceral organs but not in the brain. Only a single ewe developed central nervous symptoms and a rhomb‐encephalitis was immunohistologically confirmed. In this case the infection proceeded from the nasal mucosa into the brain, with no infections of the liver, spleen and other visceral organs. Sampling of the cheese pro
Who reads Outbreak of Clinical Listeriosis in Sheep: Evaluation from possible Contamination Routes from Feed to Raw Produce and Humans?
It is typically read by researchers, students, and practitioners in Agricultural and Biological Sciences.
- Author
- M. Wagner; D. Melzner; Z. Bagò; P. Winter; M. Egerbacher; F. Schilcher; A. Zangana; D. Schoder
- Publisher
- John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Wiley (ISSN 0931-1793)
- Published
- 2005
- Language
- EN
- Field
- Agricultural and Biological Sciences (Life Sciences)