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http://dx.doi.org/10.13103/JFHS.2019.34.4.361

Investigation of Microbial Contamination in Semisulcospira libertine and Evaluation of Its Reduction Effects by Sediment Removal Treatment  

Choi, Man-Seok (Institute of Marine Industry, Gyeongsang National University)
Jun, Eun Bi (Institute of Marine Industry, Gyeongsang National University)
Choi, Seungho (3M Korea Ltd.)
Bang, Hyeon-Jo (3M Korea Ltd.)
Park, Shin Young (Institute of Marine Industry, Gyeongsang National University)
Publication Information
Journal of Food Hygiene and Safety / v.34, no.4, 2019 , pp. 361-366 More about this Journal
Abstract
In this study, microbial contamivation semisulcospira libertine and effect of sedimentation treatment of major bacterial and fungal pathogens were investigated. The total aerobic bacteria, coliforms, Escherichia coli, Staphylococcus aureus, and yeast and mold present in raw and water-dipped Semisulcospira libertine were enumerated using the standard plate count methods on using the standard plate method on potato dextrose agar (PDA), 3M Petrifilm for coliforms / E. coli, 3M Petrifilm for S. aureus, and plate count agar (PCA), respectively. In analysis of microbial contamination of raw Semisulcospira libertine, the total aerobic bacteria, coliforms, and yeast and mold were monitored as 6.40, 2.70, and $6.79{\log}_{10}CFU/g$, respectively. Both E. coli and S. aureus were not detected (detection limit: 10 CFU/g). However, Semisulcospira libertine dipped in ground water for 3 hours had higher contamination levels of all natural indigenous microorganisms than raw Semisulcospira libertine. Especially, E. coli was detected as $2.46{\log}_{10}CFU/g$ in the ground water-dipped Semisulcospira libertine. The total aerobic bacteria in the ground water-dipped Semisulcospira libertine was not significantly reduced (p>0.05) compared to that in the raw Semisulcospira libertine. Moreover, coliforms were significantly increased (p>0.05) in all water-dipped Semisulcospira libertine. Only fungi were slightly reduced (less than 0.2 log) (p>0.05) in the tap water-dipped Semisulcospira libertine by comparison with the raw Semisulcospira libertine. The results of this study suggest that the use of chemical sterilizing agents and other physical methods in the washing stage will be necessary for the microbial reduction in raw Semisulcospira libertine because the use of sediment removal treatment by ground or tap water did not affect the microbiological safety of the raw Semisulcospira libertine.
Keywords
Semisulcospira libertine; Microbial contamination; Sediment removal treatment; Ground water; Tap water;
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