Efficacy of Acidified Sodium Chlorite in controlling Listeria monocytogenes in Salmon fillet.

Abstract

The purpose of this study was planned out to evaluate the effectiveness of Acidified Sodium Chlorite (ASC) on the viability of L. monocytogenes by contaminating Salmon fish samples with 1x108 cfu/g of L. monocytogenes, followed by dipping the contaminated samples in different concentrations of ASC 250, 500 and 1000 ppm. The samples were stored in refrigerator at ° 4c to be examined for L. monocytogenes count at Zero day ,First, third, fifth and seventh day of refrigeration storage. The results revealed that the counts of L.monocytogenes in salmon fish samples dipped in different ASC concentrations of 250, 500 and 1000 ppm in zero (treatment day), were 1x107,3.8x106 and 1x106 cfu/g respectively, and in the first day after storage the counts were 8x106,1x106 and 1x105 cfu/g respectively while in the third ,fifth and seventh day the counts were reduced to be <10 cfu/g.