From: Characterization of minimal lesions related to the presence of visna/maedi virus in the mammary gland and milk of dairy sheep
Grade of lesions
Group A
(%)
Group B
Total
Minimal (+)
15
(34.1)
11
(31.4)
26
(32.9)
Moderate (++)
18
(40.9)
14
(40)
32
(40.5)
Severe (+++)
7
(15.9)
5
(14.3)
12
(15.2)
None (−)
4
(9.1)
9
(11.4)
44
35
79