CHANGES ON BEEF ADIPOSE TISSUE FOLLOWING DECONTAMINATION WITH CHEMICAL SOLUTIONS OR WATER OF 35C OR 74C

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Abstract
Spray‐washing reduced aerobic plate counts (APC) by 0.88 to 2.83 log colony forming units (CFU)/cm2, with hot water (74C) being the most effective treatment. Counts exceeded 6 log CFU/cm2 in 1–3, 7–11, 11–16, 16–23 and 23–29 days of storage for unwashed, washed with hydrogen peroxide, washed with 35C water or ozonated water or trimmed/washed with 35C water, washed with commercial sanitizer, and washed with trisodium phosphate, respectively. Samples washed with acetic acid or water of 74C reached only 4.31 and 4.36 log CFU/cm2, respectively, at 29 days of storage. Increases in the concentration of thiobarbituric acid reactive‐substances (TBARS) were slowest in samples washed with trisodium phosphate. Spray‐washing with 2% acetic acid or 74C water were the most effective treatments for reducing microbial growth, followed by trisodium phosphate which also reduced lipid oxidation during storage of beef.