Fallon R J
Ann Rech Vet. 1978;9(2):347-52.
A survey of 1,250 purchased calves found that 40% had blood serum Ig values of less than 15 ZST units. A positive relationship was obtained between initial blood serum Ig level of the purchased calf and subsequent mortality. Calf liveweight gain within two systems of calf rearing was not related to initial blood serum Ig levels. No relationship was obtained between initial Ig levels and incidence of diarrhoea. Artificially feeding the newborn calf to appetite with first milking colostrum in two feeds, the first 4-6 hrs after birth and a second 4-6 hrs later results in 95% of calves having blood serum Ig levels greater than 15 ZST units. Artificially feeding the calf colostrum in the presence of the dam resulted in a significant increase in the calf's blood serum Ig level. Artificially feeding colostrum at room temperature (14 degrees C) did not significantly reduce colostrum intake or calf blood serum Ig levels.
对1250头购买的犊牛进行的一项调查发现，40%的犊牛血清免疫球蛋白（Ig）值低于15个ZST单位。购买的犊牛初始血清Ig水平与随后的死亡率之间存在正相关关系。在两种犊牛饲养系统中，犊牛的体重增加与初始血清Ig水平无关。初始Ig水平与腹泻发病率之间没有关系。在出生后的头4 - 6小时和4 - 6小时后分两次用初乳人工喂养新生犊牛至食欲满足，95%的犊牛血清Ig水平高于15个ZST单位。在母牛在场的情况下人工喂养犊牛初乳会导致犊牛血清Ig水平显著增加。在室温（14摄氏度）下人工喂养初乳不会显著减少初乳摄入量或犊牛血清Ig水平。
