Bibliographic citations
Domínguez, D., (2014). Efecto de la refrigeración y la aplicación de ácido láctico sobre la presencia de Listeria monocytogenes en canales bovinas en un centro de beneficio de Lima - Perú [Tesis, Universidad Nacional Mayor de San Marcos]. https://hdl.handle.net/20.500.12672/3936
Domínguez, D., Efecto de la refrigeración y la aplicación de ácido láctico sobre la presencia de Listeria monocytogenes en canales bovinas en un centro de beneficio de Lima - Perú [Tesis]. PE: Universidad Nacional Mayor de San Marcos; 2014. https://hdl.handle.net/20.500.12672/3936
@misc{renati/476393,
title = "Efecto de la refrigeración y la aplicación de ácido láctico sobre la presencia de Listeria monocytogenes en canales bovinas en un centro de beneficio de Lima - Perú",
author = "Domínguez Miguel, Daicy Carla",
publisher = "Universidad Nacional Mayor de San Marcos",
year = "2014"
}
--- The presence of L. monocytogenes in beef carcasses makes it a potential disease risk to consumers because it causes listeriosis, disease to which are more susceptible pregnant women and those with depressed immune systems. Because of this, the aim of this study was to evaluate the effect of lactic acid at 2.5% of concentration as decontaminating beef carcasses on the presence of L. monocytogenes on the surface of beef carcasses and to assess the behavior of this bacterium in cooling and under the action of lactic acid. The study was conducted in a profit center of Lima where a total 58 bovine carcasses were sampled randomly divided into two groups. The samples were enclosed by sterile frameworks and corresponded to a total area of 400 cm² per bovine carcasses, taken from 4 zones (hip, flank, brisket and neck) by nondestructive method of swabbing. These samples were enriched in specific culture media and finally subjected to incubation for the presence of L. monocytogenes by use of a diagnostic kit. In the results were observed carcasses who had changes for the presence of bacteria on the surface of carcasses before and after chilling and the action of lactic acid, however when evaluating the results by McNemar statistical test notes that these changes were randomized (p>0.05) to group 1 and group 2, which was subjected to the action of lactic acid, it appears that no statistically significant difference (p <0.05) so the bactericidal action of lactic acid 2.5% is shown against L. monocytogenes on the surface of carcasses. We conclude that treatment with 2.5% lactic acid is useful as a decontaminant but its use would not replace good hygiene practices or profit during storage or refrigerated chambers because the treatment had a bactericidal effect in over 50% but not all of bovine carcasses evaluated. Keywords: carcasses, L. monocytogenes, listeriosis, acid, lactic, decontamination
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