Smart M E, Gudmundson J, Brockman R P, Cymbaluk N, Doige C
Can Vet J. 1980 Dec;21(12):349-52.
Four seven month old Simmental calves were examined because of unthriftiness, a persistent cough, stiffness and lameness. The calves had gastrointestinal and pulmonary parasitism. Analysis of the blood copper levels of these calves and of cows and calves on the farm indicated a generalized deficiency. Only the calves affected with parasitism showed signs of clinical copper deficiency.
对4头7月龄西门塔尔犊牛进行了检查，这些犊牛出现生长不良、持续咳嗽、僵硬和跛行症状。这些犊牛存在胃肠道和肺部寄生虫感染。对这些犊牛以及该农场的母牛和犊牛的血铜水平分析表明存在全身性缺乏。只有受寄生虫感染的犊牛表现出临床铜缺乏症状。
