Table 1.

The number of isolates of the various subspecies of Salmonella enterica in animals in Sweden during 1968–97.

Salmonella enterica subspecies	1968–72	1973–77	1978–82	1983–87	1988–92	1993–97
Subspecies I (Subsp. enterica)	1721	1077	1231	720	524	435
Subspecies II (Subsp. salamae)	10	2	4	6	11	29
Subspecies IIIa & IIIb (Subsp. arizonae & diarizonae)	14	19	14	13	59	73
Subspecies IV (Subsp. houtenae)	1	2	1	3	4	15
Not typed or typable	6	16	18	4		3
Total	1752	1116	1268	746	598	555