Abstract
In 1951 Takiguchi isolated four kinds of bacteria from soil, tentatively named strain A, B, C and D, which decomposed riboflavin. Bacteriological examinations have been made to know if they are of the same kind as the riboflavin decomposing bacteria discovered by Foster. The results showed that strain A was Bacillus fusiformis, strain D one of its variant, while strain B and C belonged to Bacillus circulons. Thus the bacteria examined were found to be quite different from Foster's bacteria, Pseudomonas.
