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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。
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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。
时间:2022-03-05 10:20
关键词:
人体寄生虫学
基础医学
大学试题
医学
答案解析
<p> 病原体在病媒节肢动物体内的发育繁殖类型有4种:<br> (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。<br> (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。<br> (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。<br> (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。</p>
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