ICAR Technical Series no. 7 - Nitra Proc.

Teat callosity and mastitisResultsTeat end callosity thickness (TECT) of clinical mastitis quarters was onaverage higher than of lateral quarters without clinical mastitis of the samecow. Clinical mastitis cows scored higher TECR and TECT than their pairedhealthy herd mate when the mastitis occurred after the first and beforethe sixth month in lactation (Figure 1).The probability of clinical mastitis in the next lactation month is increasedby more then 2 times when the callosity rings are rough and thick (Figure 2).Teat ends without any callosity ring also cause a higher probability ofmastitis. A teat with a thin smooth callosity ring causes the least probabilityof clinical mastitis.2.72.5TECT2.32.11.91.710 40 70 100 130 160 190 220 250 280DIM0.70.60.5TECR0.40.30.20.110 40 70 100 130 160 190 220 250 280DIMFigure 1. Teat end callosity thickness (TECT) and roughness (TECR) duringlactation for cows without clinical mastitis (-¡-), or with clinical mastitis in thefirst (-¨¨-), second (-▲-), third (-■-), fourth and fifth (-◆-) and ≥6 (-●-) monthof lactation, calculated from the final regression models.200Conference on "Physiological and technicalaspects of machine milking"