to elucidate if they were factors really linked with mammary infections , a complementary analysis is described as necessary ( cf . second part of this study ) .2 ) risk or protective factors , which appeared as : - absence of at least one annual examination of the milking machine ( risk factor for clinical mastitis ) - udder washing with individual towels , associated with enough straw for bedding ( protective factor against mastitis ) - teat dipping ( associated with low milk cell-counts ) other prophylactic methods appeared without any effect .
C0006141
mammary
C0026131
milking