摘要：Salmonella typhimurium isolates from river water, meat and humans in Osaka City were biotyped according to the scheme of Duguid et al . (J. Med. Microbiol., 8 , 149-166 (1975)). A total of 134 strains were classified into 31 biotypes. Biogroup 1 was the most predominant type not only among the strains from humans (65%) but also among the strains from meat (39%) and river water (64%). Of the biogroup 1 isolates (81 strains), 78% (63 strains) were allotted into id or 1df. The distriubution of biotypes found among strains from river water correlated well with that among the isolates from humans. Monitoring of river water and biotyping of the isolates are useful to assume the predominant type in humans.
