Efecto de Acidos Grasos de Cadena Corta sobre el desarrollo de Salmonelas en Agua Cecal

ARGAÑARAZ MARTÍNEZ E.; BABOT J.D.; APELLA M. C.; PEREZ CHAIA A.

Buenos Aires

Congreso; XXII Congreso Latinoamericano de Avicultura; 2011

Asociación Latinoamericana de Avicultura

The infection of poultry by Salmonella, a risk always present in the poultry industry, can cause major economic losses. The use of acidifying agents as a method of controlling the growth of these pathogens is a common practice, but alternatives like short-chain fatty acid (SCFA) producer probiotic microorganisms are encouraging. In this context, the probiotic properties of the genus Propionibacterium are worth studying. On a first stage, we determined the basal acetic, propionic and butyric acid concentrations in the intestine of birds fed a conventional diet and those obtained after 10 hours of anaerobic incubation of cecal homogenates or cecal water inoculated with propionibacteria of avian origin. Subsequently, the effect of both concentrations of SCFA on the growth of four species of Salmonella: Salmonella Pullorum, S. Typhimurium, S. Enteritidis and S. Gallinarum at two initial pH values was evaluated in sterile cecal water. All Salmonella species studied were able to grow with different efficiency depending on the initial pH of the medium and the SCFA concentration tested. S. Typhimurium and S. Enteritidis were the most susceptible to the SCFA added at an initial pH value of 7.5, while S. Gallinarum and especially S. Pullorum were markedly inhibited by SCFA at lower pH conditions. These studies are the base for further research on the Salmonella-Propionibacterium-intestinal microbiota interactions seeking exclusion agents (probiotics) that meet the needs of the poultry industry.