From: Prevalence of four different subgenotypes of genotype 4 hepatitis E virus among swine in the Shanghai area of China
No. of farm
Positive samples/Total analyzed (%)
Subgroup of the strains
1
4/20(20%)
II
2
8/24(33.3%)
I
3
2/22(9.1%)
4
3/15(20%)
III
5
5/20(25%)
6
2/10(20%)
IV