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Evaluation of loop-mediated isothermal amplification method for detecting enterotoxin a gene of Staphylococcus aureus in pork.
MedLine Citation:
PMID:  22299420     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
Staphylococcus aureus is an important food-borne pathogen of humans due to ingestion of food containing enterotoxigenic strains. We evaluated the detection of S. aureus enterotoxin A gene (sea) using a loop-mediated isothermal DNA amplification (LAMP) method. Specificity of LAMP method was comparable to that of conventional PCR. Both methods correctly identified sea and did not detect 14 other non-Staphylococcus strains. Limit of detections of LAMP assay for direct detection of S. aureus was 10(4) cfu/ml while that of PCR was 10(3) cfu/ml. Both methods were employed for the detection of S. aureus spiked pork samples to assess their sensitivity. LAMP method was able to detect a minimum of 10(3) cfu/g while PCR 10(4) cfu/g of pork sample following incubation in tryptic soy broth for 6 hours. The LAMP assay allows a one-step identification of gene of interest without any specialized equipment and requires less time than conventional PCR, thus suggesting that the LAMP technique might be an appropriate alternative diagnostic method for detecting enterotoxin A gene of S. aureus in food sample.
Authors:
Theeranan Suwanampai; Kobchai Pattaragulvanit; Preprame Pattanamahakul; Orasa Sutheinkul; Kazuhisa Okada; Takeshi Honda; Jiraporn Thaniyavarn
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Southeast Asian journal of tropical medicine and public health     Volume:  42     ISSN:  0125-1562     ISO Abbreviation:  Southeast Asian J. Trop. Med. Public Health     Publication Date:  2011 Nov 
Date Detail:
Created Date:  2012-02-03     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0266303     Medline TA:  Southeast Asian J Trop Med Public Health     Country:  Thailand    
Other Details:
Languages:  eng     Pagination:  1489-97     Citation Subset:  IM    
Affiliation:
Department of Microbiology,Faculty of Science, Chulalongkorn University, Bangkok, Thailand.
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