Mastitis is an inflammation of the mammary gland initiated by pathogenic bacteria. In fact, mastitis second most important reason for culling cows from dairy herds, after infertility. this review we focus on various forms mastitis, including subclinical and clinical mastitis. We also stress importance dry-off period as time when bacteria might start their insult to gland. An part negative effec...

the objective of the study was to evaluate the uterine histopathological changes in holstein dairy cows, within the range of 90-145 day in milk, with or without clinical history of reproduction system disorders. lactating holstein cows (n =133) with (n=92, 69.17%) or without (n= 41, 30.82%) recorded clinical signs of reproduction diseases were examined for uterine histopathological lesions. the...

this prospective longitudinal study deals with the associations between digital disorders and reproduction indices in dairy cattle on a farm in the vicinity of tehran. it was carried out on 225 postparturient holstein heifers. the evaluation of lameness due to digital disorders on postpartum period of heifers were done and after diagnosis of lameness (based on a 5 points lameness scoring system...

Underfeeding or overfeeding CP to dairy cows can have detrimental effects on milk production, efficiency of nutrient utilization, reproduction, the environment, and the overall profitability of the dairy operation. Therefore, the amount and source of CP to feed must be determined if we are to optimize productivity, maximize nutrient utilization, avoid polluting the environment, and increase pro...