The association between BoLA class I antigens and mastitis was studied
in Boheman Pied breen and its crosses. The mastitis status was follow
ed during two years according to three diagnostic criteria: California
Mastitis Test, bacteriological findings and the sensually altered mil
k. The antigen w16 was found to be significantly associated with susce
ptibility to mastitis in all diagnostic tests. On the other hand there
were some indications that the wll animals were rather resistant to m
astitis.