Toman M, Psikal I, Mensík J
Vet Med (Praha). 1985 Jul;30(7):401-8.
Forty-three calves of various age from the day of birth to the age of three months were subjected to the 2-hydroxyethylmethacrylate (HEMA) particle phagocytosis test. Significant differences in the phagocytic activity of blood leucocytes were recorded, all depending on age. New-born calves had very low phagocytic activity: only 16.5% of the leucocytes were found to be phagocytic, the phagocytic index being 0.39. A rapid increase in phagocytic activity was recorded during the subsequent days. At the age of three days 43% of the leucocytes of the calves were phagocytic. A decrease in phagocytic activity was found on the sixth to seventh day, and another increase was recorded only from the age of three to four weeks of age. No such changes in the development of phagocytic activity were observed in the calves reared without colostrum administration. Low values were maintained for a longer time after birth without the typical increase on the third to fifth day. Phagocytic activity increased in the zero-colostrum calves experimentally infected with rotavirus.
对43头年龄从出生日到3个月大的小牛进行了甲基丙烯酸2-羟乙酯（HEMA）颗粒吞噬试验。记录到血液白细胞吞噬活性存在显著差异，所有差异均取决于年龄。新生小牛的吞噬活性非常低：仅发现16.5%的白细胞具有吞噬作用，吞噬指数为0.39。在随后的几天里，吞噬活性迅速增加。在3日龄时，小牛43%的白细胞具有吞噬作用。在第6至7天发现吞噬活性下降，并且仅从3至4周龄开始又出现增加。在未给予初乳饲养的小牛中未观察到吞噬活性发育的此类变化。出生后较长时间维持低值，没有在第3至5天出现典型的增加。在实验性感染轮状病毒的无初乳小牛中，吞噬活性增加。
