Objective. To characterize probiotic lactic acid bacteria isolated from adult pig intestine as an alternative to antibiotics. Materials and methods. For isolation of lactic acid bacteria, samples of large intestine of 20 adult pigs were included. The characterization of biochemical and physiological parameters of the lactic acid bacteria (LAB) required an evaluation of the pH of the ferment, determination of organic acids by HPLC and detection of lactic acid isomers. Microbiological processes assessed the capacity of inhibiting the growth of pathogenic and