Dilov P, Antonov S, Lalov Kh
Vet Med Nauki. 1981;18(10):56-64.
The indices of the red and white blood picture were studied in a total of 788 calves, aged up to 30 days, 541 out of which were born in the winter-spring months, and 253 of which were born on the same farms in the summer-autumn months, originating from 17 dairy farms of 6 regions of the country. It was found that the calves born on industrial cattle-breeding farms were comparatively often affected with anemia, showing lower hemoglobin level, hematocrit values, and erythrocyte count along with hypoferremia. More widely occurring was the anemia in calves during the winter-spring period as well as in twin calves and calves of cows that gave birth for the first time. Simmenthals and Simmenthal crosses were shown to suffer more often from anemia than the calves of the Bulgarian Brown and Black-and-white breeds and their crosses. There were no sexual differences with regard to the hematologic indices. The percent of day-old diseased calves was comparatively high.
对总共788头30日龄以下的犊牛的血常规指标进行了研究，其中541头出生于冬春季节，253头出生于夏秋季节，来自该国6个地区的17个奶牛场。结果发现，出生在工业化养牛场的犊牛相对更常患贫血症，表现为血红蛋白水平、血细胞比容值和红细胞计数较低，同时伴有低铁血症。冬春季节的犊牛、双胞胎犊牛以及初产母牛所生的犊牛中贫血更为普遍。西门塔尔牛及其杂交品种比保加利亚褐牛和黑白花牛及其杂交品种的犊牛更常患贫血症。血液学指标不存在性别差异。一日龄患病犊牛的比例相对较高。
