Lactobacillus bulgaricus contains a substance which may improve immunogenicity and reduce the toxicity of pertussis vaccination (whooping cough vaccine). - GreenMedInfo Summary

The influence of blastolysin, the cell-wall glycopeptide of Lactobacillus bulgaricus, on the main immunobiological properties of pertussis vaccine, its immunogenicity and toxicity, has been studied. The use of blastolysin, introduced as a stimulating agent in definite doses and following definite administration schedules, has been shown to permit achieving not only an increase in the immunogenicity of the corpuscular pertussis vaccine, but also a considerable decrease in its toxicity and histamine-sensitizing activity.