Resumen

IEZZI, S.; SALLOVITZ, J.M.  y  PURSLOW, P.. Eficacia de la aspersión de ácido láctico (4%) en el descenso de enterobacterias totales y Escherichia coli en reses bovinas. Rev. vet. [online]. 2016, vol.27, n.1, pp.41-44. ISSN 1669-6840.

The aim of this study was to evaluate the effectiveness of 4% lactic acid spraying in the reduction of total enterobacteria and E. coli in beef carcass surfaces, applied either before or after washing carcasses with water. For this purpose, four carcasses were selected. Four half-carcasses were sprayed with 4% lactic acid while their corresponding four half-carcasses were used as controls. The same procedure was performed with four additional carcasses after being washed with water. The presence and bacterial count of total enterobacteria and E. coli were determined in all the samples using swabs. Before washing with water, the total counts (colony-forming units CFU) in untreated (control) carcasses were between 7 and 280 CFU/cm2 for total enterobacteria and between 7 and 95 CFU/cm2 for E. coli. The disinfection treatment with 4% lactic acid showed a 100% efficacy when applied before washing the carcasses with water and a 75% efficacy when applied after washing. According to the results obtained, the treatment with a 4% solution of lactic acid applied on the beef carcass surface before and/or after the carcass washing might be a potential low-cost disinfection alternative against contamination by total enterobacteria and E. coli.

Palabras clave : cattle; slaughterhouse; beef; disinfection; total enterobacteria; Escherichia coli.

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