TITLE:
Effects of Sodium Lactate on the Survival of Listeria Monocytogenes, Escherichia coli O157:H7, and Salmonella spp. in Cooked Ham at Refrigerated and Abuse Temperatures
AUTHORS:
Cheng-An Hwang, Shiowshuh Sheen, Vijay Juneja
KEYWORDS:
Ham, Lactate, Listeria Monocytogenes, Escherichia Coli O157: H7, Salmonella spp.
JOURNAL NAME:
Food and Nutrition Sciences,
Vol.2 No.5,
July
8,
2011
ABSTRACT: The objective of this study was to determine the effect of sodium lactate on the survival of Listeria monocytogenes, Escherichia coli O157: H7, and Salmonella spp. in cooked ham during storage at refrigerated and abuse temperatures. Cooked ham was added with 0% - 3% lactate, inoculated with a multiple-strain mixture of L. monocytogenes, E. coli O157: H7, or Salmonella spp. and stored at 4oC - 15oC for up to 35 day. The growth of the three pathogens was inhibited in ham containing 3% lactate, and no growth of E. coli O157: H7 and Salmonella spp. occurred at the lowest storage tem- peratures of 6 and 8oC, respectively. In ham containing no lactate, the average growth rates were 0.256 - 0.380 log CFU/day for L. monocytogenes at 4oC - 8oC, 0.242 - 0.315 log CFU/day for E. coli O157: H7 at 8oC - 15oC, and 0.249 - 0.328 log CFU/day for Salmonella spp. at 10oC - 15oC. The addition of 1% or 2% lactate significantly (P