Abstract

The article presents the results of scientific research aimed at studying mastitis incidence in first-calf heifers and the affection of udder quarters in the mastitic first-calf heifers on eleven small farms in the Kotayk and Ararat regions of Armenia. According to the results of scientific research, subclinical mastitis incidence in first-calf heifers made 32.3 %, while the number of affected udder quarters was 78 (per 100 animal units). The clinical mastitis was diagnosed in 10.7 % of firstcalf heifers and the number of affected udder quarters was 25. Upon the research results, the experimental farms were provided with practical recommendations on prevention of mastitis in first-calf heifers.

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