Aislamiento de microorganismos autóctonos de cerdos y selección de bacterias lácticas potencialmente probióticas

ROSS, R;; GUSILS, C; GONZÁLEZ, S

Tafí de Valle, Tucumán

Jornada; XXIII Jornadas Científica de Biología; 2006

Asociación de Biología de Tucumán

ISOLATION OF MICROORGANISMS FROM PIGS AND SELECTION OF POTENTIALLY PROBIOTIC ACID LACTIC BACTERIA. Ross Gloria Romina, Gusils Carlos Univ. Nac. Tucumán, Fac. Bioqca, Qca y Fcia, Ayacucho 495 romiross23@hotmail.com In last years, prevention to avoid infection in livestock industry was increased. Probiotics are microorganisms that preserve intestinal microflora and avoid harmful bacteria development. The objects of this work were isolate acid lactic strains and pathogens from pigs and study the interaction between the microorganisms isolated. From fecal samples, it were isolated strains (acid lactic bacteria and pathogens) using different growth mediums. Pathogens and acid lactic bacteria (BAL) isolated were identified by biochemical tests. The inhibition?s ability was studied by two in vitro techniques: I) supernatant agar diffusion, ii) mixed BAL and pathogens cultures. The inhibitory effect of BAL in most cases was due to acid production, but in3 strains the inhibition could be by bacterioncins, because it was kept after neutralization. It was observed also BAL inhibition against pathogens using mixed cultures, without significant different values on the growth performance of potentially probiotic bacteria. The results of the present work suggest that these probiotic strains would be used to develop a probiotic food product for piglets to prevent infectious diseases.