Assessment of microbiological contamination in saengshik products from the Korean market and identification of the irradiation status
2018
Kim, G.R., Kyungpook National University, Daegu, Republic of Korea | Hafiz Muhammad Shahbaz, University of Veterinary and Animal Sciences, | Kyung, H.K., Kyungpook National University, Daegu, Republic of Korea | Kwon, J.H., Kyungpook National University, Daegu, Republic of Korea
This study investigated the prevalence of microbiological contamination in commercial Saengshik products (samples SP-1 to SP-12) from the Korean market, and identified their irradiation status. SP-2, SP-8, and SP12 showed less than 3.66 and 1.10 log colony forming units (CFU)/g in total plate and coliforms counts, respectively, while the remaining samples showed more than 4.70 and 2.35 log CFU/g, respectively. Four samples were positive on some of foodborne pathogenic bacteria (Clostridium perfringens, Escherichia coli O157:H7, and Bacillus cereus). SP-2, SP-8, and SP-12 contained no pathogenic bacteria and were suspected to have been irradiated. They were confirmed as positive using photostimulated luminescence (PSL) analysis. PSL positive results on samples SP-2, SP-8 and SP-12 were finally confirmed by the authentic thermoluminescence (TL) analysis on the basis of TL glow curve shape, intensity, temperature range of TL peak maxima and TL ratio (TL₁/TL₂).
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