Lactic acid inactivation of Salmonella typhimurium attached to catfish skin

This study was conducted to test sanitizer efficacy of lactic acid on Salmo nella typhimurium populations that were firmly attached or loosely, attache d on catfish skin with or without mucus. For both cell types, counts of S. typhimurium were reduced from 5.9 log(10) CFU/skin to below the limit of de tection of 2.0 log(10) CFU/skin by a 5 min exposure to 2% lactic acid. Expo sure for I min reduced a 10(4) CFU/skin inoculum to below the limit of dete ction. Catfish skin mucus slightly decreased the antimicrobial effect of la ctic acid against firmly attached S. typhimurium.