抄録
Three kinds of thiamine-degrading bacteria were found in chicken feces sampled in Osaka city. Thirteen strains of Bacillus thiaminolyticus, 2 strains of Bacillus aneurinolyticus and 3 strains of Clostridium thiaminolyticum were isolated from 160 specimens of the feces. The Bacillus thiaminolyticus obtained was inoculated orally to the chickens from whom the bacillus had been isolated. It was found that the number of bacteria administered was reduced daily, without any production of thiaminase of the feces.