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Title: Machine-induced teat tissue reactions and infection risk in a dairy herd free from contagious mastitis pathogens. Author: Zecconi A, Hamann J, Bronzo V, Ruffo G. Journal: J Dairy Res; 1992 Aug; 59(3):265-71. PubMed ID: 1401351. Abstract: Machine-induced changes in teat thickness were measured in a randomly selected group of 22 cows from a commercial dairy herd consisting of 110 cows during an experiment lasting 1 year. Half the cows used were free from mastitis whereas the remainder had at least one quarter infected by environmental pathogens. Teats were classified according to a threshold change in teat end thickness of 5%. The relationships between quarter infection or teat duct colonization and teat end thickness changes induced by machine milking were investigated. Teats with greater than 5% change in thickness had significantly increased teat duct colonization and a slight, non-significant, increase in quarter infection. We conclude that machine-induced changes in teat end thickness are predisposing factors for teat duct colonization by environmental pathogens. This may provide an increased new infection risk, especially when hygiene is poor.[Abstract] [Full Text] [Related] [New Search]