Document Detail


Comparative evaluation of the association among enumeration methods and production of enterotoxins in food-derived Staphylococcus aureus.
MedLine Citation:
PMID:  22468348     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
Staphylococcal food poisoning is one of the most common foodborne diseases worldwide; it results from the ingestion of staphylococcal enterotoxins (SEs) in food, mainly Staphylococcus aureus. This study investigated the statistical relationships among morphological enumerations of food-derived S. aureus and production of SEs using different methodologies. Food samples naturally contaminated with coagulase-positive S. aureus were submitted for enumeration on Baird-Parker (BP) agar, Rabbit Plasma Fibrinogen agar (RPFA), and Petrifilm Staph Express count system (STX), and the morphologically typical colonies were isolated for VIDAS and real-time (RT) PCR tests. RPFA and STX displayed better performance for the enumeration of SE-positive S. aureus when compared with BP, including higher frequencies of SE-positive isolates and better correlation indices between typical and SE-positive counts. Among all the evaluated culture media, no significant difference (P > 0.05) was shown on the frequencies of typical colonies that carried 11 individual se genes. In addition, results for SE identification between VIDAS and RT-PCR assay were unparalleled. These data will be valuable for the selection of methods for inspection of food-derived S. aureus.
Authors:
Chi Zhang; Deqin Zhang; Jun Yang; Jungui Zhou; Qilong Hu; Rui Ling; Mingsheng Dong
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of AOAC International     Volume:  95     ISSN:  1060-3271     ISO Abbreviation:  J AOAC Int     Publication Date:    2012 Jan-Feb
Date Detail:
Created Date:  2012-04-03     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9215446     Medline TA:  J AOAC Int     Country:  United States    
Other Details:
Languages:  eng     Pagination:  105-10     Citation Subset:  IM    
Affiliation:
National Supervision and Testing Center for Agricultural and Sideline Product Quality, Nanjing Institute of Supervision and Testing on Product Quality, Nanjing Engineering Technical Research Center for Inspection of Food Quality and Security, 168 Hongshan Rd, Nanjing, Jiangsu, People's Republic of China 210028.
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