Document Detail


Incidence and persistence of Listeria monocytogenes in the catfish processing environment and fresh fillets.
MedLine Citation:
PMID:  20828470     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
Bang-Yuan Chen; Rajkumar Pyla; Tae-Jo Kim; Juan L Silva; Yean-Sung Jung
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Journal of food protection     Volume:  73     ISSN:  0362-028X     ISO Abbreviation:  J. Food Prot.     Publication Date:  2010 Sep 
Date Detail:
Created Date:  2010-09-10     Completed Date:  2010-11-02     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7703944     Medline TA:  J Food Prot     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1641-50     Citation Subset:  IM    
Affiliation:
Department of Food Science, Nutrition and Health Promotion, Mississippi State University, Mississippi 39762, USA.
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MeSH Terms
Descriptor/Qualifier:
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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