Pigs were fed 24-hour cultures of Lactobacillus spp. daily for 34 days. On the 8th day of Lactobacillus spp feeding, animals were inoculated with 10⁸ colony-forming units (CFU) of Salmonella typhimurium.

Based on these data, feeding Lactobacillus spp. cultures to pigs infected with S. typhimurium reduced the number of animals that were culture-positive for S. typhimurium by fecal and tonsil samples. Further, feeding Lactobacillus spp. cultures reduced the duration of S. typhimurium shedding from tonsil and fecal samples.