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Development of a novel polymerase spiral reaction (PSR) assay for rapid and visual detection of Staphylococcus aureus in meat.
- Source :
-
LWT - Food Science & Technology . Mar2021, Vol. 139, pN.PAG-N.PAG. 1p. - Publication Year :
- 2021
-
Abstract
- Staphylococcus aureus is one of the most common and leading causes of food poisoning and also responsible for multifarious diseases in humans. Rapid and on-site detection of S. aureus is of specific importance in developing countries. In the present study, a polymerase spiral reaction (PSR) assay was developed for sensitive, rapid and visual detection of S. aureus and validated in meat using pork as a model. The specificity of the PSR assay was ascertained by using 18 S. aureus and 17 non- S.aureus strains. The PSR assay was 100- and 10-fold more sensitive than conventional end-point PCR and real-time PCR, respectively. The limit of detection of the PSR assay was 19.9 × 103 CFU/g of pork without enrichment and 19.9 CFU/g after 6 h enrichment. The detection of 19.9 CFU/g of pork was attained within 8 h. Real-world or field applicability of the developed assay was evaluated by screening 76 raw and processed pork samples. Seeing its rapidity, simplicity, cost-effectiveness, user-friendliness and sophisticated-equipment free nature, this assay has the prospective to turn into the assay of choice for regular detection of S. aureus in foods in less-advanced laboratories. To our knowledge, this is the first report to use PSR for the detection of S. aureus. • A novel PSR assay was developed for rapid and visual detection of Staphylococcus aureus in meat. • The analytical sensitivity of the PSR assay was 100 and 10 fold more than the conventional and real-time PCR, respectively. • The detection of limit of 19.9 × 103 CFU and 19.9 CFU per gram of meat was attained within 2 h and 8 h, respectively. [ABSTRACT FROM AUTHOR]
- Subjects :
- *FOOD poisoning
*MEAT
*DETECTION limit
*MICROCOCCACEAE
DEVELOPING countries
Subjects
Details
- Language :
- English
- ISSN :
- 00236438
- Volume :
- 139
- Database :
- Academic Search Index
- Journal :
- LWT - Food Science & Technology
- Publication Type :
- Academic Journal
- Accession number :
- 148316287
- Full Text :
- https://doi.org/10.1016/j.lwt.2020.110507