Vaccination with ΔXIII does not have any effect in body temperature and weight gain. Piglets from the vaccinated group (open squares) were orally vaccinated with 2.8 × 109 cfu of ΔXIII at 5 days of age and boosted with 1.3 × 109 cfu at 28 days of age. The control group (black triangles) received sterile LB broth. From left to right, changes in mean temperature, weight and daily weight gain (DWG) of each group are shown. No significant difference in these parameters was found between groups. Statistical analysis was carried out using a two-way analysis of variance combined with the Bonferroni test.