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

Journal of Food Protection
Victoria R LappiM Wiedmann

Abstract

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 Listeria contamination. Environmental, raw material, and finished product samples were collected weekly during the main processing months (April to June) and tested for Listeria spp. and Listeria monocytogenes. Before implementation of control strategies (year 1), the two processing plants showed Listeria spp. prevalences of 29.5% (n = 78) in raw, whole crawfish, 5.2% (n = 155) in the processing plant environment, and 0% (n = 78) in finished products. In year 2, after plant-specific Listeria control strategies were implemented, Listeria spp. prevalence increased in raw crawfish (57.5%, n = 101), in the processing plant environment (10.8%, n = 204), and in the finished product (1.0%, n = 102). Statistical analysis showed a significant increase in Listeria spp. prevalence (P < 0.0001) and a borderline nonsignificant increase in L. monocytogenes prevalence (P = 0.097) on raw material in year 2. Borderline nonsignificant increases were also observed for Listeria spp. prevalence in environmental samples (P = 0.082). Our data showed that Listeria ...Continue Reading

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Citations

May 18, 2012·Critical Reviews in Food Science and Nutrition·Sara R MililloSteven C Ricke
Jul 10, 2013·Journal of Food Protection·Walid Q Alali, Donald W Schaffner
Apr 25, 2006·Journal of Food Protection·Chung-Hsi ChouChinling Wang
Sep 1, 2018·Comprehensive Reviews in Food Science and Food Safety·Claire ZoellnerRenata Ivanek
Jun 10, 2021·Microbial Biotechnology·Nika JanežJerica Sabotič
Jun 29, 2021·Frontiers in Microbiology·Tobin SimonettiDumitru Macarisin

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