星期一 2025年 8月 25日
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武汉肺炎病原体 何为新型冠状病毒?

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其实嘛,冠狀病毒(Coronavirus)是一类核糖核酸病毒(RNA病毒)的总称。

拥高度变异性的RNA病毒家族中,冠狀病毒持有最大规模基因组。在电子显微镜下,冠狀病毒边缘有一层蛋白包膜,长着不少棘突,形态上近似日冕(Corona)般,看起来有点像皇冠(Crown),因此,被冠上“冠状”之称。

冠狀病毒是通过包膜上的棘突,依附在受感染个体的细胞上,在非活跃期间,静静地潜伏在体内。

冠狀病毒会引发呼吸道感染,一般上,是普通感冒、流感等的常见病原体。

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基于冠狀病毒的高度变异性,过去十余年来,已经接连不断出现“新型冠狀病毒”,其中包括严重急性呼吸系统综合症(SARS)、中东呼吸综合症(MERS),以及第7种已知会传染人类的最新型冠狀病毒,也就是武汉冠状病毒。

与其它冠状病毒不同,武汉病毒首先侵袭的并非是上呼吸道,患者不会有明显的症状,例如咳嗽或发热等,反而其攻击目标,是位于人体深部的肺泡,引发肺炎症状。

因此,俗称“武汉肺炎”,也并不为过吧。

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