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简述病原体在病媒节肢动物体内的发育繁殖类型。

问答题
2022-03-05 10:20
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正确答案

病原体在病媒节肢动物体内的发育繁殖类型有4种:
(1)发育式病原体在节肢动物体内只有形态变化,无数量的增加。例如:丝虫幼虫在蚊体内的发育。
(2)繁殖式病原体在节肢动物体内无形态变化,但有数量的增加。例如:鼠疫杆菌在蚤体内的增殖。
(3)发育繁殖式病原体在节肢动物体内既有形态变化,又有数量的增加。例如:疟原虫在蚊体内的发育。
(4)经卵传递式病原体在节肢动物体内增殖后,侵入卵巢进入卵内,卵孵化后传递给下一代。如全沟硬蜱传播的远东型蜱媒脑炎。


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