Three hundred and eighty-four strains of bacteria representing the genera of the were examined over a wide range of biochemical, physiological, and morphological characters. The data were subjected to numerical analysis, and the resulting 33 clusters were equated as far as possible with established taxa within the The clusters formed three groups. Group A corresponded to the tribe and consisted of the genera , and The data suggest that and , could be combined into a single genus, whereas should be retained in a genus separate from Group B comprised the tribes , and Strains of species fell into two clusters, suggestive of possible biotype differences or perhaps two separate species. Many of Kauffmann's biochemical subgroup 1 salmonellae could be combined into a single species, which on grounds of priority should be designated (Gaertner) Castellani and Chalmers. However, there are other subgroup 1 serotypes which clearly do not belong in this species. Further study is suggested. Three species of , i.e., , and , were not separated by the analyses performed in this study. Either the three species cannot be identified on the basis of the biochemical characters employed or their identification requires considerable modification. Also included in group B were members of the genus Group C, representing the tribe , requires considerable revision, if a classification reflecting both molecular genetic and phenetic taxonomic relationships is to be attained.


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