Quarter‐milking‐, quarter‐, udder‐ and lactation‐level risk factors and indicators for clinical mastitis during lactation in pasture‐fed dairy cows managed in an automatic milking system

Abstract

Under the study conditions, the risk of clinical mastitis increased for quarter-milkings in quarters that were milked less frequently in the previous 7 days, were low-yielding, had fast peak milk flow rates and had more milkings in which blood was detected in milk and/or the milk conductivity was elevated. Risk was also increased in days 10-29 of lactation and in higher parity lactations.