[Salmonella possessing the 6,7:c:1,5 antigenic factors].

A total of 358 Salmonella strains belonging to subspecies I (other than "S. typhisuis") and possessing the 6,7:c:1,5 antigenic factors were studied on the basis of their classical biochemical characters and their subfactors of the H:c antigen. They were classified into 4 homogeneous taxa which can be differentiated by the use of three characters: production of acid from dulcitol and mucate and H2S production. Production of acid from arabinose and trehalose are not reliable markers. The taxonomic level of these four taxa founded on their biochemical characters is that of biovars within one serovar. For practical purposes, we propose to refer to these biovars as Paratyphi C, Choleraesuis sensu stricto, Choleraesuis var. Kunzendorf and Choleraesuis var. Decatur.