Fecal culturable microbiota, growth and clinical parameters of calves supplemented with lactic acid bacteria and lactose prior and during experimental infection with Salmonella Dublin DSPV 595T

SOTO, LORENA; FRIZZO, LAUREANO; SIGNORINI, MARCELO; ZBRUN, MARÍA; LAVARI, LUISINA; BERTOZZI, EZEQUIEL; SEQUEIRA, GABRIEL; ROSMINI, MARCELO

ARCHIVOS DE MEDICINA VETERINARIA

UNIV AUSTRAL CHILE

Lugar: Valdivia; Año: 2015 vol. 47 p. 237 - 244

0301-732X

The aim of this study was to evaluate the probiotic inoculum + lactose effect on weight, intestinal culturable microbiota, morbidity and mortality of young calves challenged with Salmonella Dublin DSPV 595T. Twenty eight calves were used, divided in control group (CG) and probiotic group (PG). The PG was provided with 100 g lactose.calf-1.d-1 and 1010 CFU.calf-1.d-1 of each strain of a probiotic inoculum composed of Lactobacillus casei DSPV 318T, Lactobacillus salivarius DSPV 315T and Pediococcus acidilactici DSPV 006T throughout the experiment. The pathogen was administered on day 11 of the experiment, at an oral dose of 109 CFU.calf-1. Lactobacillus and yeast populations were modified in PG because of inoculum + lactose administration. Severity of diarrhea was lower in PG. No differences were found on the rest of clinical sings, live weight and mortality between the two groups analyzed. In our study, the periodic administration of a probiotic inoculum of bovine origin and lactose, favoured the establishment of a more stable and balanced intestinal culturable microbiota, even during an infection with Salmonella. However, the inoculum + lactose was not able to avoid the most effects caused by the pathogen, except to decrease the severity of diarrhea, possibly because of Salmonella Dublin DSPV 595T dose used was too high to be counteracted by probiotics.