猪等孢球虫的致病性及生活史的研究  

STUDIES ON THE PATHOGENICITY AND LIFE CYCLE OF Isospora suis

作　　者：李小玲[1] 林辉环[1] 翁亚彪[1] 

机构地区：[1]华南农业大学动物医学系

出　　处：《华南农业大学学报》1998年第4期10-13,共4页Journal of South China Agricultural University

摘　　要：猪等孢球虫能致仔猪球虫病，接种２０万孢子化卵囊后３ｄ出现腹泻，第４ｄ水泻，仔猪脱水消瘦，死亡率１５％，接种后５ｄ排卵囊，持续５ｄ显微病变见肠绒毛萎缩，局部粘膜糜烂与溃疡，并出现纤维素性坏死性肠炎猪等孢球虫的发育史包括２代无性生殖和１代有性生殖，多寄生于空肠、回肠；感染后３６ｈ出现第１代裂殖体，８４ｈ出现第２代裂殖体有性阶段出现在感染后９６ｈ，１０８ｈ出现未成熟卵囊。Isospora suis can cause coccidiosis in nursing pigs. Piglets exhibited diarrhea at three to four days after inoculation with 2×10 5 sporulated oocysts,followed by loss of body fluid,emaciation and with a mortality of 15%.Oocysts were discharged at five days postinoculation.Villous atrophy,ulceration and erosion were found in microscopic sections. Fibrinonecrotic membranes were found at five days postinoculation.There were two asexual and one sexual endogenous stages in the life cycle of the I. suis. These parasites reside mostly in the jejunum and ileum,and seldom the duodenum and colon.They were more frepuently located beneath the villous epithelial cell nuclei,or on the surface of the mucous membrane. Type Ⅰ schizonts and Ⅱ schizonts were seen at 36 and 84 hours postinoculation respectively.Sexual stages were found at 96 hours postinoculation.Immature oocysts appeared at 108 hours postinoculation.

关 键 词：猪等孢球虫 致病性 生活史 

分 类 号：S852.72[农业科学—基础兽医学] S858.28[农业科学—兽医学]