Journal
JOURNAL OF FOOD PROTECTION
Volume 64, Issue 9, Pages 1309-1314Publisher
INT ASSOC FOOD PROTECTION
DOI: 10.4315/0362-028X-64.9.1309
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Application of cow manure and composted manure in agricultural practice could potentially cause contamination of foodstuffs with pathogenic bacteria such as Salmonella Enteritidis and Escherichia coli O157:H7. In this study, rifampicin-resistant (Rif(R)) E. coli O157:H7 and Salmonella Enteritidis at a level of 7 log CFU/g of raw compost feed were used to determine the effect of a bench-scale composting system on their survival. Rif(R) E. coli O157:H7 was not detected after 72 h of composting at 45 degreesC, and Rif(R) Salmonella Enteritidis was not detected after 48 h. The use of selective media for enrichment failed to recover in the composting samples held at 45 degreesC for 96 h. However, the pathogens showed no change in bacterial numbers when the composting system was held at room temperature. Thus, properly composted manure can be safely used in food crop production while minimizing the likelihood of microbial contamination.
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