單項(xiàng)選擇題某犢牛群發(fā)熱、昏睡、食欲不振,伴有嚴(yán)重腹瀉、脫水,剖檢見(jiàn)腸管腫脹,充滿(mǎn)黏液和氣體,采用飽和蔗糖液漂浮法檢查患牛糞便,油鏡觀察發(fā)現(xiàn)大量?jī)?nèi)含4個(gè)裸露子孢子的卵囊,該病例最可能的致病病原是()

A.蛔蟲(chóng)
B.隱孢子蟲(chóng)
C.類(lèi)圓線蟲(chóng)
D.毛尾線蟲(chóng)
E.食道口線蟲(chóng)


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3.單項(xiàng)選擇題在紅細(xì)胞內(nèi)發(fā)現(xiàn)小于紅細(xì)胞半徑的梨籽形蟲(chóng),典型的形狀為4個(gè)梨籽形蟲(chóng)體尖端相連形成十字形,該蟲(chóng)體是()

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5.單項(xiàng)選擇題在紅細(xì)胞內(nèi)發(fā)現(xiàn)大于紅細(xì)胞半徑的梨籽形蟲(chóng),典型的雙梨籽形蟲(chóng)體尖端以銳角相連,該蟲(chóng)體是()

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