本文观察了感染微小隐孢子虫(CP)的Castellana-Manchega杂交系新生绵羊的排卵囊、临床症状变化和血清抗体动态及其相互关系。实验共5组新生绵羊。第1组5只,不以母乳喂养,第2组7只,以母乳喂养。两组于出生第1天起饲养子CP污染的环境使自然感染,随后隔离圈养;第3组4只,以母乳喂养,于2—3日龄时用5×10~6CP卵囊实 In this paper, we observed the changes of ovulation cysts, clinical symptoms and serum antibody in Castellana-Manchega hybrids infected with Cryptosporidium parvum (CP) and their correlation. A total of 5 experimental newborn sheep. Group 1, 5, not breastfeeding, group 2, 7, breastfeeding. The two groups from the first day of birth feeder CP contamination of the natural infection environment, then isolated captivity; Group 3 4, breastfeeding, at 2-3 days with 5 × 10 ~ 6CP oocysts