3^rd International Conference on Food Microbiology & Nutrition November 29-30, 2018 Dublin, Ireland

Caterina Rufo has completed her Ph.D in Nutrition and Molecular Biology at the University of Texas at Austin in 2001. She is currently a Senior Researcher (Profesor Adjunto) in the Food Safety and Nutrition Laboratory of the Instituto Polo Tecnologico, Facultad de Quimica-UdelaR. This research group develops proyects with the meat industry, in areas related to meat nutritional value, food safety and the effect of process conditions on the microbiological quality of beef meat.\r\n\r\n

\r\nThe efficacy of UV-C (254 nm) against Listeria monocytogenes (LM) contamination on polyethylene conveyor belts surface of a high throughput meat processing plant was evaluated.\r\nDifferent doses of UV-C (between 38 and 405 mWs/cm2) were studied on the survival of LM ATCC19111 in cultures on Triptone Soy Agar plates and in polyethylene coupons of 150 cm2 (clean and with meat remains). Agar plates were inoculated with 102 and 103 CFU and coupons with 105 CFU. In the abattoir, the continuous application of a dose of 163 mWs/cm2 on the conveyor belt during the production day was evaluated on three different days. Listeria spp, total mesophilic aerobic (APC), Escherichia coli (EC) and total coliforms (CB) of areas exposed and not exposed to UV-C were enumerated on 3M® Petrifilm plates\r\nReductions of LM of 3 log CFU/plate were obtained with a dose of 153 mWs/cm2 of UV-C radiation. The reduction achieved in the coupon model was 1.1 and 2.1 for clean and dirty. UV-C application on the conveyor belt in the abattoir reduced significantly (p< 0.05) Listeria spp counts in 1.2 log CFU/100 cm2 and produced a significant decrease of 1.7 log CFU/100 cm2 for APC, 1.8 log CFU/100 cm2 for EC and 2.0 log CFU/100 cm2 for CB. \r\nThe application of UV-C on the conveyor belts of the abattoir reduces Listeria and the overall microbiological contamination of the surfaces that come in contact with meat contributing to the reduction of the microbiological contamination in the final product.\r\n