Table 1.

Number of years from export until the first clinical signs of SE were detected in 49 Icelandic horses.

Years from export	0	1	2	3	4	5	6	7	8
New cases of SE	7	8	16	8	4	3	1	1	1
Prevalence of SE %	14	16	33	16	8	6	2	2	2