The experiments were conducted on eight healthy
Black Pied cows kept at the educational farm of the
AllRussian Correspondence College of Agricultural
Education (Moscow oblast). More than 50 samples of
combined milk and milk of individual cows of differ
ent breeds from various farms in the Moscow and Vor
onezh oblasts were also investigated. The composition
of milk in mastitis was determined in samples from 12
Black Pied cows at OAO Voronezhpishcheprodukt
(Voronezh oblast).