Abstract
In order to find the simplification of the isolation of the thiamine decomposing bacteria, the investigation of the colonial morphological properties was carried out on some enteric differentiating plate media about Bacillus thiaminolyticus and Bacillus aneurinolyticus compared with Shigella flexneri, Escherichia coli 119,Salmonella paratyphi A, and Bacillus subtilis. It was evidenced that the thiamine decomposing bacteria could not grow on these media, such as Salmonella-Shigella agar, Endo's agar, eosin-methylene blue agar, deoxycholate citrate agar and MacConkey's agar, but only grew on nutrient agar plate late with specific appearance.
