ON PATHOGENESIS OF SUBCLINICAL LAMINITIS IN DAIRY-CATTLE - EXAMINATION OF CLAW STATUS, RUMINAL FUNCTION AND BLOOD-COAGULATION FACTORS

In 50 dairy cows of the breed Braunvieh'' (36 heifers, 14 cows) of one herd the claw score was recorded over a period of 2 months before par turition until 6 months after parturition. The claw scores were correl ated with the clinical findings, the ruminal function and the blood co agulation factors calcium-thromboplastin (TPZ), partial thromboplastin time (PTT), thrombin time (TZ) and antithrombin III (AT III) evaluate d one day and one week after calving. The claw score increased from th e first to the second examination, remaining on the same level in the postpartal period. No correlation between the claw scores and the rumi nal function was evident. In comparison with a control group, TPZ and PTT were found higher one day and one week after parturition in the ex perimental group. Blood coagulation factors and claw scores were found uncorrelated.