Data/hora: 24/06/2024 13:40:47

Biblioteca(s): 	Embrapa Suínos e Aves.	
Tipo da produção científica: 	Artigo em Periódico Indexado	
Circulação/Nível: 	A - 1	
Data corrente: 	14/06/2016	
Data da última atualização: 	14/06/2016	
Autoria: 	CORBELLINI, L. G.; BIANCO JÚNIOR, A.; COSTA, E. de F.; DUARTE, A. S. R.; ALBUQUERQUE, E. R.; KICH, J. D.; CARDOSO, M.; NAUTA, M.	
Afiliação: 	LUÍS GUSTAVO CORBELLINI, UFRGS/Faculdade de Veterinária, Departamento de Medicina Animal; ALFREDO BIANCO JÚNIOR, MAPA; EDUARDO DE FREITAS COSTA, UFRGS/Faculdade de Veterinária, Departamento de Medicina Animal; ANA SOFIA RIBEIRO DUARTE, Technical University of Denmark; ELENITA RUTTSCHEIDT ALBUQUERQUE, MAPA; JALUSA DEON KICH, CNPSA; MARISA CARDOSO, UFRGS/Faculdade de Veterinária, Departamento de Medicina Animal; MAARTEN NAUTA, Technical University of Denmark.	
Título: 	Effect of slaughterhouse and day of sample on the probability of a pig carcass being Salmonella-positive according to the Enterobacteriaceae count in the largest Brazilian pork production region.	
Ano de publicação: 	2016	
Fonte/Imprenta: 	International Journal of Food Microbiology, v. 228, p. 58-66, 2016.	
DOI: 	http://dx.doi.org/10.1016/j.ijfoodmicro.2016.03.030	
Idioma: 	Inglês	
Conteúdo: 	Sources of contamination of carcasses during slaughter include infected pigs as well as environmentally related sources. There are many microbial indicators that can be used in the processing of food to assess food hygiene and the safety of food processing. The presence of some microbial indicators can be viewed as a result of direct or indirect contamination of a food with fecal material. The presence of Enterobacteriaceae is often used as a hygiene indicator, as they are found both in the environment and in the intestine of warm-blooded animals. An association between Salmonella isolation and Enterobacteriaceae count (EC) on pre-chill carcasses has been described, however the impact of slaughterhouse and the day of sampling on the occurrence of Salmonella has not been previously investigated. To this end, mixed logistic regressions (MLRs) with random effects and fixed slopes were performed to assess the change in EC and its correlation with Salmonella occurrence using two data sets. The first describes the EC and Salmonella isolation in 60 pork carcasses in one slaughterhouse sampled at 11 different slaughter steps, including the carcass as a random effect. The second describes the EC and Salmonella isolation on 1150 pre-chill carcasses sampled in 13 slaughterhouses over 230 sampling days, and the model combined two random intercepts, slaughterhouse and date of sampling nested with slaughterhouse (day/slaughterhouse). Statistically significant associations (p b 0.0001) between the log of the EC and Salmonella occurrence were found in all models. Nevertheless, although a strong association was found between Enterobacteriaceae and Salmonella contamination in pork carcasses, this association was not constant, given that there was a high variation in the probability of a carcass being positive for Salmonella according to the EC mainly between days of samples. The effect of the day of sampling on Salmonella prevalence was so large that the predictive value of the EC count for Salmonella isolation on a daily basiswas compromised. It is possible that on somedays batches with a high prevalence of Salmonella carriers shedding a high number of Salmonella were slaughtered. On these days, the potential for contamination/cross-contamination of carcasses will be so large that even hygienic slaughter, confirmed by the low EC on carcasses, will not be able to prevent the presence of Salmonella on some carcasses. The results of this study demonstrate that, despite the statistically significant association found, it may be difficult to predict when hygiene failure measured via EC actually indicates Salmonella contamination, and neither the inverse.	
Palavras-Chave: 	Qualidade da carne.	
Thesagro: 	Carcaça; Salmonella; Suíno.	
Thesaurus Nal: 	Meat quality; Swine production.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Suínos e Aves (CNPSA)	
Exemplares: 	CNPSA - (20673-1) - UPC - AP - DD -  -  -  - DIS