Journal of Food Processing & Technology

Antimicrobial effects of vinegar against norovirus and Escherichia coli in the traditional Korean vinegar green laver (Enteromorpha intestinalis) salad during refrigerated storage

15^th International Conference on Food Processing & Technology

October 27-29, 2016 Rome, Italy

Shin Young Park, Seh Eun Kim and Sang-Do Ha

Chung-Ang University, Republic of Korea

Posters & Accepted Abstracts: J Food Process Technol

Abstract:

This study investigated the antimicrobial effects of 5-15% vinegar on the survival of murine norovirus-1 (MNV-1) and E. coli in green lavers during 7-d storage period at 4°C. The MNV-1 were significantly (p<0.05) higher in 0% vinegar-containing lavers (3.63 log) than in 5~15% vinegar-containing lavers (3.29~3.04 log) throughout 7 d of storage. A 1-log reduction in MNV-1 was observed in 0~10% vinegar-containing laver after 5 d of storage and 15% vinegar-containing laver after 3 d of storage. The E. coli was also significantly decreased in 15% (6.84 log) vinegar-containing lavers than in 10% (7.33 log) and 5% (7.60 log) vinegar-containing lavers. >1-log reduction in E. coli was observed in 10~15% vinegar-containing laver after 1 d of storage. 2-log reduction in E. coli was also observed in 10~15% vinegar-containing laver after 5 d of storage. Using the Weibull model, the dR-values of MNV-1 were 4.90 d for 0%, 4.28 d for 5%, 3.79 d for 10%, and 2.88 d for 15% vinegar-containing lavers, whereas those for E. coli were 1.12 d for 5%, 1.03 d for 10%, and 0.90 d for 15% vinegar-containing lavers. This study suggests that ~1 d of storage is required for 1-log reduction in E. coli in vinegar-containing lavers, whereas 3~5 d of storage is adequate for 1-log reduction in MNV-1 in vinegar-containing and non-vinegar-containing lavers.

Biography :

Shin Young Park has completed her PhD from Texas A&M University in USA and Post-doctoral studies from Chung-Ang Univeristy (CAU) in Korea. She is the Research Professor in School of Food Science and Technology of CAU. She has published more than 70 research papers including review papers in reputed journals such as Food Microbiology, International Journal of Food Microbiology, Food Research International, and Food Control.

Email: helenapark1@hanmail.net