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http://dx.doi.org/10.5657/kfas.2003.36.3.193

Psychrotrophic Characteristics of Listeria monocytogenes YM-7 Isolated from a Patient  

KIM Young Mog (Institute of Agricultural Science & Technology, Kyungpook National University)
PARK Mi Yeon (Department of Food Science & Technology, Pukyong National University)
MOK Jong Soo (National Fisheries Research & Development Institute)
KIM Ji Hoe (National Fisheries Research & Development Institute)
CHANG Dong Suck (Department of Food Science & Technology, Pukyong National University)
Publication Information
Korean Journal of Fisheries and Aquatic Sciences / v.36, no.3, 2003 , pp. 193-197 More about this Journal
Abstract
Psychrotrophic characteristics of Listeria monocytogenes YM-7 showed similar growth at $8^{\circ}C$ as L. monocytogenes ATCC 15313. But it showed different growth pattern at $4^{\circ}C.$ Thus the isolated strain from the Patient can not grow at $4^{\circ}C,$ while L. monocytogenes ATCC 15313 grow slowly. Number of the injured cells of L. monocytogenes YM-7 was higher at $-3^{\circ}C$ than at $-18^{\circ}C$ in phosphate buffer solution. The rate of the injured cell was higher in the TSB (tryptic soy broth) medium than in phosphate buffer solution at $-3^{\circ}C$ and $-18^{\circ}C.$ When L. monocytogenes YM-7 stored at $-18^{\circ}C$ in homogenized fish muscle, the cell numbers decreased by 2-3 log cycles in 12 weeks.
Keywords
Listeria monocytogenes YM-7; Psychrotrophic characteristics;
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