Sarcocyitis cruzi,S.hirsuta and S.hominis from cattle have been iden tified by the ultrastructure of cysts under transmission electron microscoty.

• 依据电镜下包囊的超微结构从黄牛肌肉中鉴别出3种住肉孢子虫：枯氏住肉孢子虫、毛形住肉孢子虫和人住肉孢子虫。