An assessment of Salmonella survival in pig manure and its separated solid and liquid fractions during storage

McCarthy, Gemma and Lawlor, Peadar G. and Gutierrez, Montserrat and O’Sullivan, Laurie and Murphy, Anne and Zhan, Xinmin and Gardiner, Gillian E. (2015) An assessment of Salmonella survival in pig manure and its separated solid and liquid fractions during storage. Journal of Environmental Science and Health - Part B Pesticides, Food Contaminants, and Agricultural Wastes, 50 (2). pp. 135-145. ISSN 0360-1234

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Abstract

The objective of this study was to examine Salmonella survival in pig manure and its separated fractions during storage. Salmonella declined, but significant reductions were not observed in the manure and liquid until day 56, whereas counts in the solids were lower by day 7. The Salmonella inoculum initially impacted counts but not after days 28–56. By day 112 Salmonella was undetectable in the manure and liquid but was recovered from the solids. There was no clear dominance of particular serotypes and antibiotic resistance transfer was not found. Storage duration and pH impacted Salmonella counts in all samples, with duration having the greatest effect. Of the nutrients, nitrate had the greatest impact in the manure and, together with phosphate, it also affected counts in the liquid fraction. This study demonstrates that if pig manure or its separated fractions are stored under controlled conditions at 10.5°C for 84–112 days Salmonella is reduced or eliminated, irrespective of the initial load.

Item Type:	Article
Additional Information:	Funding Information: Funding was provided by the Higher Education Authority Technological Sector Research Strand I Programme and the Department of Agriculture and Food’s Research Stimulus Fund Programme. G. McCarthy’s PhD was funded by the Teagasc Walsh Fellowship Scheme. Publisher Copyright: © 2015, Copyright © Taylor & Francis Group, LLC.
Uncontrolled Keywords:	/dk/atira/pure/subjectarea/asjc/1100/1106
Departments or Groups:
Depositing User:	Admin SSL
Date Deposited:	19 Oct 2022 23:06
Last Modified:	27 Jul 2023 07:05
URI:	http://repository-testing.wit.ie/id/eprint/4057

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