1. A novel in situ methodology for visual detection of Clostridium perfringens in pork harnessing saltatory rolling circle amplification.
- Author
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Milton, Arockiasamy Arun Prince, Momin, Kasanchi M., Priya, Govindarajan Bhuvana, Ghatak, Sandeep, Gandhale, Pradeep N., Angappan, Madesh, Das, Samir, and Sen, Arnab
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CLOSTRIDIUM perfringens , *PUBLIC health , *PORK , *DETECTION limit , *FOOD pathogens - Abstract
Clostridium perfringens (C. perfringens), a prolific toxin-producing anaerobe is an important foodborne pathogen with a huge public health concern. Rapid and on-site detection of C. perfringens is of specific importance in developing countries. In the present study, saltatory rolling circle amplification (SRCA) assay was developed for culture-independent, rapid and visual detection of C. perfringens and evaluated in meat with pork as a model. The specificity of the SRCA assay was ascertained by using 62 C. perfringens and 18 non- C. perfringens strains. The analytical sensitivity of the developed SRCA, conventional and real-time PCR assays were 80 fg, 800 fg and 800 fg DNA per tube, respectively. The limit of detection of the SRCA assay was 80 CFU/g of pork in the absence of enrichment and 8 CFU/g after short enrichment of 6 h. The detection limits of 80 CFU/g and 8 CFU/g of pork were attained within 120 min and 8 h, respectively. Real-world or field relevancy of the developed assay was evaluated by screening 82 raw and processed pork samples. As the developed assay is simple, user-friendly, cost-effective and sophisticated-equipment free, it would be more suitable for on-site testing of C. perfringens in foods. To our information, this is the first report to apply SRCA for the detection of C. perfringens. [Display omitted] • A novel SRCA assay was developed for rapid and visual detection of Clostridium perfringens in meat. • The analytical sensitivity of the SRCA assay (80 fg) was 10 fold more than the conventional and real-time PCR. • The detection limit of 80 CFU and 8 CFU per gram of meat was attained within 120 min and 8 h, respectively. • This is the first report to use SRCA for the detection of C. perfringens. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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