| Incidence and persistence of Listeria monocytogenes in the catfish processing environment and fresh fillets. | |
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MedLine Citation:
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PMID: 20828470 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Incidence of Listeria spp. in whole raw catfish, catfish fillets, and processing environments from two catfish processing facilities was determined in August 2008 and August 2009. Thirty-nine (18.4%) of 212 samples collected in August 2008 were positive for Listeria monocytogenes. Prevalences of Listeria species L. innocua and L. seeligeri-L. welshimeri-L. ivanovii were 11.3 and 23.6%, respectively. Of 209 samples collected in August 2009, 12.4% were positive for L. monocytogenes, 11% for L. innocua, and 19.6% for L. seeligeri-L. welshimeri-L. ivanovii. No Listeria grayi was detected in any of the samples. L. monocytogenes was not found in catfish skins and intestines, but was detected in catfish fillets, on food contact surfaces, and on non-food contact surfaces with frequencies of 45.0, 12.0, and 11.1%, respectively. In August 2008 isolates, serotypes 1/2b (62.2%) and 3b (15.6%) were frequently isolated, whereas the majority of the August 2009 isolates (92.3%) were serotype 1/2b. Genotyping analyses revealed that some genotypes of L. monocytogenes isolates were detected in one facility even after a year, but no persistence of L. monocytogenes was observed in the other facility. In addition, some L. monocytogenes isolates from fresh fillets showed genotypes that were either identical, or more than 90% similar, to those of L. monocytogenes isolates from food contact surfaces in the processing lines. The results of this study suggest that processing environment rather than whole raw catfish is an important source of L. monocytogenes contamination in the catfish fillets. These results should assist the catfish industry to develop better control and prevention strategies for L. monocytogenes. |
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Authors:
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Bang-Yuan Chen; Rajkumar Pyla; Tae-Jo Kim; Juan L Silva; Yean-Sung Jung |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
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Title: Journal of food protection Volume: 73 ISSN: 0362-028X ISO Abbreviation: J. Food Prot. Publication Date: 2010 Sep |
Date Detail:
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Created Date: 2010-09-10 Completed Date: 2010-11-02 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7703944 Medline TA: J Food Prot Country: United States |
Other Details:
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Languages: eng Pagination: 1641-50 Citation Subset: IM |
Affiliation:
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Department of Food Science, Nutrition and Health Promotion, Mississippi State University, Mississippi 39762, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Bacterial Typing Techniques Catfishes / microbiology* Consumer Product Safety Food Contamination / analysis* Food Microbiology Food-Processing Industry / standards Listeria / classification, growth & development Listeria monocytogenes / classification*, growth & development* Phylogeny Seafood / microbiology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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