TABLE 1.

Salmonella species, subspecies, serotypes, and their usual habitats, Kauffmann-White scheme^a

Salmonella species and subspecies	No. of serotypes within subspecies	Usual habitat
S. enterica subsp. enterica (I)	1,454	Warm-blooded animals
S. enterica subsp. salamae (II)	489	Cold-blooded animals and the environmentb
S. enterica subsp. arizonae (IIIa)	94	Cold-blooded animals and the environment
S. enterica subsp. diarizonae (IIIb)	324	Cold-blooded animals and the environment
S. enterica subsp. houtenae (IV)	70	Cold-blooded animals and the environment
S. enterica subsp. indica (VI)	12	Cold-blooded animals and the environment
S. bongori (V)	20	Cold-blooded animals and the environment
Total	2,463

^aThe Kauffmann-White scheme has been described elsewhere (18, 19). 

^bIsolates of all species and subspecies have occurred in humans.