Enterococcus mundtii ST4SA and Lactobacillus plantarum 423 alleviated symptoms of Salmonella infection, as determined in Wistar rats challenged with Salmonella enterica serovar Typhimurium.

Wistar rats were administered daily with Lactobacillus plantarum 423 and Enterococcus mundtii ST4SA through intragastric gavage (1 x 10(8) cfu of each strain and a combination of the two strains). Sterile saline was used as placebo. After 7 days, the animals were challenged by infection with 2 x 10(8) CFU Salmonella enterica serovar Typhimurium.

Lactic acid bacteria population in children diagnosed with human immunodeficiency virus.

Aim: To determine the effect of trimethoprim/sulphamethoxazole treatment on the natural population of lactic acid bacteria in the intestinal tract and to determine if any of the strains developed resistance to antibiotics.

Methods: Lactic acid bacteria were isolated from stool samples of 100 children. The isolates were identified based on biochemical characteristics and DNA profiles obtained from polymerase chain reaction with genus- and species-specific primers.