Autolyzed Saccharomyces cerevisae reduce microbiological carcass contamination in feedlot steers

• Autor(a) principal: Delazeri, Dailis
• Data de Publicação: 2023
• Outros Autores: Buzi, Kate Aparecida, Neumann, Mikael, Rossi, Patricia dos Santos, Zart, Tiefanny, Garbossa, Gabriela, Hintz, Loisa Padilha, Bertagnon, Heloisa Godoi
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Semina. Ciências Agrárias (Online)
• Texto Completo: https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/45031
• topic: Contaminação de carcaça; Doenças transmissíveis por alimentos (DTA); Escherichia coli.; Carcass contamination; Escherichia coli; Foodborne pathogens; Yeast.

The present work aims to verify whether the autolyzed Saccharomyces cerevisiae reduces total coliforms, Escherichia coli and Salmonella spp. from the hide, feces and carcass of feedlot-finished steers. Eighteen half-Angus steers were subjected to three treatments daily for 105 days: control (n=6), Lev 4 g (diet with 4 g yeast animal day-1, n=6) or Lev 7 g (diet with 7 g yeast animal day-1, n=6). On Days 29 and 90 after entrance into the feedlot, fecal samples, skin swabs, water and food were collected to identify and count E. coli and total coliforms and identify Salmonella spp. On the day of slaughter, carcasses were collected to identify and quantify E. coli, total coliforms, and mesophiles. There were reductions in E. coli and total coliforms in fecal samples (P=0.0001 and 0.001, respectively) and mesophilic aerobics in carcasses (P= 0.05) in the treated groups, and no Salmonella spp. was observed in any of the samples collected. It was concluded that supplementation reduced fecal excretion of and, consequently, carcass contamination by E. coli, mesophiles and total coliforms in confined animals and that this technique is a beneficial and residue-free sanitary measure to improve the microbiological quality of meat.