| The role of diet and acid tolerance response on the survival of common Salmonella serotypes in faeces of finishing pigs. | |
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MedLine Citation:
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PMID: 22038599 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Persistence of Salmonella in the environment is an important factor influencing the transmission of infection in pig production. This study evaluated the effects of acid tolerance response (ATR), organic acid supplementation, and physical properties of feed on survival of a five-strain Salmonella mixture in porcine faeces held at 4°C and 22°C for 88 days. Acid-adapted or non-acid-adapted nalidixic-acid resistant Salmonella strains were used to inoculate faeces of pigs fed four different diets consisting of a non-pelleted, finely ground meal feed and a finely ground pelleted feed, supplemented or unsupplemented with K-diformate. Organic acid supplementation and physical properties of feed markedly influenced Salmonella survival but effects were highly dependent on storage temperature, survival was unaffected by ATR. The most pronounced effects were observed at 22(o)C, a temperature similar to that of finishing pig houses. Supplementation of meal diets with K-diformate significantly reduced duration of survival (P < 0.1) and increased rates of decline (P < 0.0001) of salmonellae in faeces compared to survival in faeces of pigs fed unsupplemented meal. Pelleting of feed, compared to feeding meal, significantly reduced (P < 0.1) duration of survival in faeces held at 22°C. Only minor effects of feed form and acid supplementation on survivor numbers were observed at 4°C. Differences in faecal survival of Salmonella could not be related to diet-induced changes in faecal physio-chemical parameters. Predominant survival of S. Typhimurium DT193 and S. 4,[5],12:i:- in porcine faeces demonstrates the superior ability of these serotypes to survive in this environment. Faecal survival and transmission of Salmonella in pig herds may be reduced by dietary approaches but effects are highly dependent on environmental temperature. |
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Authors:
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Ursula Rajtak; Fiona Boland; Nola Leonard; Declan Bolton; Séamus Fanning |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-10-28 |
Journal Detail:
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Title: Applied and environmental microbiology Volume: - ISSN: 1098-5336 ISO Abbreviation: - Publication Date: 2011 Oct |
Date Detail:
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Created Date: 2011-10-31 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7605801 Medline TA: Appl Environ Microbiol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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School of Agriculture, Food Science and Veterinary Medicine, UCD Veterinary Sciences Centre, University College Dublin, Dublin 4, Ireland. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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