Impact of intervention strategies on Listeria contamination patterns in crawfish processing plants: a longitudinal study.

摘要: Two ready-to-eat crawfish processing plants were monitored for 2 years to study the impact of Listeria control strategies, including employee training and targeted sanitation procedures, on contamination. Environmental, raw material, finished product samples collected weekly during main months (April June) tested spp. monocytogenes. Before implementation strategies (year 1), two showed prevalences 29.5% (n = 78) in raw, whole crawfish, 5.2% 155) plant environment, 0% products. In year 2, after plant-specific implemented, prevalence increased (57.5%, n 101), environment (10.8%, 204), (1.0%, 102). Statistical analysis a significant increase (P < 0.0001) borderline nonsignificant L. monocytogenes 0.097) material 2. Borderline increases also observed environmental 0.082). Our data that can vary significantly among seasons. However, contamination materials only resulted limited with extremely low levels Heat treatment combined prevent cross-contamination thus appears be effective achieving contamination, even more than 50%.