問題詳情

60.下列有關魚類住血寄生蟲的敘述,何者正確?
(A)Trypanosoma有二根鞭毛在血液中泳動時,可機械性破壞血球
(B)Trypanoplasma可由魚體表黏液排出體外而傳播
(C)Hemogregarine寄生在紅血球的細胞核中,破壞血球造成貧血
(D)Trypanoplasma需藉魚蛭的傳播

參考答案

答案:B
難度:適中0.421965
統計:A(31),B(73),C(42),D(27),E(0)

用户評論

終於.......】評論

(A)具一條鞭毛的魚類住血原蟲。常見的有2種,Try. carassii (Try. danliewski)感染淡水魚,包括金魚、鯉魚、丁鱖tench、鰻魚、大眼鱖 (Saccobranchus fossilis)。Trp. Murmanense感染海水魚,包括鱈魚、比目魚、鰻魚等13種。水平感染,主要感染血液。感染淡水魚及海水魚,野生魚類較常見,需要中間媒介---魚蛭傳播,以完成生活史。 (D)Trypanoplasma (Cryptobia) borreli is a haematozoic endoparasite transmitted by leeches (Piscicola sp.)The pathogen can also survive on the body surface of fish because it has a contractile vacuole to osmoregulate when the fish is in fresh water. This allows for direct transmission betw...

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