Publication: Rapid detection of clostridium perfringens in food by loop-mediated isothermal amplification combined with a lateral flow biosensor
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Issued Date
2021-01-01
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19326203
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2-s2.0-85099395500
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Mahidol University
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SCOPUS
Bibliographic Citation
PLoS ONE. Vol.16, No.1 January (2021)
Suggested Citation
Thanawat Sridapan, Wanida Tangkawsakul, Tavan Janvilisri, Wansika Kiatpathomchai, Sirintip Dangtip, Natharin Ngamwongsatit, Duangjai Nacapricha, Puey Ounjai, Surang Chankhamhaengdecha Rapid detection of clostridium perfringens in food by loop-mediated isothermal amplification combined with a lateral flow biosensor. PLoS ONE. Vol.16, No.1 January (2021). doi:10.1371/journal.pone.0245144 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/79415
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Title
Rapid detection of clostridium perfringens in food by loop-mediated isothermal amplification combined with a lateral flow biosensor
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Abstract
Clostridium perfringens is a key anaerobic pathogen causing food poisoning. Definitive detection by standard culture method is time-consuming and labor intensive. Current rapid commercial test kits are prohibitively expensive. It is thus necessary to develop rapid and cost-effective detection tool. Here, loop-mediated isothermal amplification (LAMP) in combination with a lateral-flow biosensor (LFB) was developed for visual inspection of C. perfringens-specific cpa gene. The specificity of the developed test was evaluated against 40 C. perfringens and 35 other bacterial strains, which showed no cross-reactivity, indicating 100% inclusivity and exclusivity. LAMP-LFB detection limit for artificially contaminated samples after enrichment for 16 h was 1-10 CFU/g sample, which was comparable to the commercial real-time PCR kit. The detection performance of LAMP-LFB was also compared to culture-based method using 95 food samples, which revealed the sensitivity (SE), specificity (SP) and Cohen's kappa coefficient (κ) of 88.0% (95% CI, 75.6%-95.4%), 95.5% (95% CI, 84.8%-99.4%) and 0.832 (95% CI, 0.721-0.943), respectively. Area under the receiver operating characteristic (ROC) curve was 0.918 (95% CI, 0.854-0.981), indicating LAMP-LFB as high relative accuracy test. In conclusion, LAMP-LFB assay is a low-cost qualitative method and easily available for routine detection of C. perfringens in food samples, which could serve as an alternative to commercial test kit.