Resumen

GUSILS, Carlos; BUJAZHA, Marina  y  GONZALEZ, Silvia. Preliminary studies to design a probiotic foruse in swine feed. INCI [online]. 2002, vol.27, n.8, pp.409-413. ISSN 0378-1844.

During inhibitory activity screening of 100 strains of lactic acid bacteria isolated from the gastrointestinal tract of pigs only six, four identified as Enterococcus faecium and two as Lactobacillus acidophilus, showed inhibition against enteric indicator strains: Salmonella enteritidis, S. cholera suis, S. typhimurium and Yersinia enterocolitica. The inhibitory action was not affected by the addition of catalase and no inhibition was detected after neutralizing the supernatant culture fluid. Furthermore, these two L. acidophilus showed agglutination with treated yeast. The agglutination of one strain was inhibited by maltose, this suggests the presence of a lectin-like structure in their cell walls, which could be responsible for its adhesion ability. The selected strains were resistant to pH 3.0 and bile salts. These strains fulfil the conditions of probiotic bacteria and could be selected for elaborating pig probiotic feed, in order to prevent infectious diseases.

Palabras clave : Mixed Cultures ; Pig ; Probiotic .