title: Antilisterial properties of marinades during refrigerated storage and microwave oven reheating against post-cooking inoculated chicken breast meat.
abstract: This study evaluated growth of Listeria monocytogenes inoculated on cooked chicken meat with different marinades and survival of the pathogen as affected by microwave oven reheating. During aerobic storage at 7 °C, on days 0, 1, 2, 4, and 7, samples were reheated by microwave oven (1100 W) for 45 or 90 s and analyzed microbiologically. L. monocytogenes counts on nonmarinated (control) samples increased (P < 0.05) from 2.7 ± 0.1 (day-0) to 6.9 ± 0.1 (day-7) log CFU/g during storage. Initial (day-0) pathogen counts of marinated samples were <0.5 log CFU/g lower than those of the control, irrespective of marinating treatment. At 7 d of storage, pathogen levels on samples marinated with tomato juice were not different (P ≥ 0.05; 6.9 ± 0.1 log CFU/g) from those of the control, whereas for samples treated with the remaining marinades, pathogen counts were 0.7 (soy sauce) to 2.0 (lemon juice) log CFU/g lower (P < 0.05) than those of the control. Microwave oven reheating reduced L. monocytogenes counts by 1.9 to 4.1 (45 s) and >2.4 to 5.0 (90 s) log CFU/g. With similar trends across different marinates, the high levels of L. monocytogenes survivors found after microwave reheating, especially after storage for more than 2 d, indicate that length of storage and reheating time need to be considered for safe consumption of leftover cooked chicken.
authors: Center for Meat Safety and Quality, Dept. of Animal Sciences, Colorado State Univ., Fort Collins, CO 80523-1171, USA.
authors: Aliyar
authors: A
authors: Fouladkhah
authors: Ifigenia
authors: I
authors: Geornaras
authors: George-John
authors: GJ
authors: Nychas
authors: John N
authors: JN
authors: Sofos
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D055598:Chemical Phenomena; D002645:Chickens; D015169:Colony Count, Microbial; D003296:Cooking; D005506:Food Contamination / Q000517:prevention & control; D005516:Food Microbiology; D061353:Food Storage / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D008089:Listeria monocytogenes / Q000187:drug effects* / Q000254:growth & development; D008460:Meat / Q000382:microbiology*; D008872:Microwaves; D012034:Refrigeration / Q000379:methods*; D013696:Temperature
chemical_list: D000900:Anti-Bacterial Agents