Treatment of inoculated beef trimming with 30 g/L caprioic acid alone, reduced (P < 0.05) coliformpopulations by 1.04 log10 CFU/g as compared to control (IN þ W). Combination treatment with 30 g/L caprioic acid plus 5 g/L EG reduced coliform populations by 0.82 log10 CFU/g as compared with 30 g/L caprioic acid treatment alone and control (IN þ W). Antimicrobial treatment of inoculated beef trimming with peroxyacetic acid without 5 g/L EG, coliform populations reduced by 0.64 log10 CFU/g and by 0.72 log10 CFU/g when treated in combination with 5 g/L EG as compared with control.
Among organic acids, 30 g/L malic acid exhibited a reduction of coliform population by 0.15 log10 CFU/g when applied alone. However, combination of 30 g/L malic acid and 5 g/L EG reduced (P < 0.05) coliform population by 0.61-log CFU/g. Similar results were observed with 30 g/L levulinic acid treatment. A 30 g/L levulinic acid treatment of inoculated beef trimming reduced (P < 0.05) coliform populations by 0.3 log10 CFU/g individually and 0.2 log10 CFU/g in combination with 5 g/L EG. Compared to the control (IN þ W) 5 g/L EG reduced (P < 0.05) coliform populations by 0.37 log10 CFU/g
(Fig. 4).