Behavior of Listeria monocytogenes at 7°C in commercial turkey breast, with or without antimicrobials, after simulated contamination for manufacturing, retail and consumer settings

摘要: Uncured turkey breast, commercially available with or without a mixture of potassium lactate and sodium diacetate, was sliced, inoculated 10-strain composite of Listeria monocytogenes , vacuum-packaged, stored at 4 1 C, to simulate contamination after a lethal processing step the plant. At 5, 15, 25 50 days storage, packages were opened, slices tested, bags remaining slices reclosed rubber bands; this simulated home use plant-sliced -packaged product. same above time intervals, portions original product (stored 4 1 C in bags) sliced inoculated as above, packaged delicatessen bags, simulating during slicing/handling retail home. Both sets aerobically 7 1 C for 12 to simulate storage. L. monocytogenes populations lower ( P o 0.05) storage breast containing combination of lactate diacetate compared antimicrobials under both scenarios. Due prolific growth the pathogen plant-contamination scenario lactate-diacetate vacuum-packaged (4 1 C), populations 3 aerobic (7 1 C) such ranged from 4.6 7.4logcfu/cm 2 . Under retail/home-contamination scenario, mean rates (logcfu/cm 2 /day) organism 0.14 0.16, 0.25 0.51, in product lactate-diacetate, respectively; decreased with age Overall, lactate- diacetate retail/home-contamination associated highest lowest pathogen levels aerobic storage 7 1 C, respectively. However, 5- 15-day-old resulted in similar (7.3�7.7logcfu/cm 2 ), irrespective