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警惕!研究称部分新冠患者康复后粪便内病毒仍具传染性

2020-09-07 王嘉程 中国新闻网

香港中文大学(中大)医学院7日在记者会上宣布,首次证实新冠肺炎患者即使无肠胃不适症状,肠道及粪便内都会发现活跃新冠病毒;部分患者康复后,粪便内病毒仍具传染性及可复制性。同日,中大新冠病毒检测中心成立,

香港中文大学(中大)医学院7日在记者会上宣布,首次证实新冠肺炎患者即使无肠胃不适症状,肠道及粪便内都会发现活跃新冠病毒;部分患者康复后,粪便内病毒仍具传染性及可复制性。同日,中大新冠病毒检测中心成立,致力为婴幼儿作粪便检测,旨在切断隐性传播链。

中大医学院今年2月至4月跟进本地15名患者,发现近半患者即使未出现肠胃不适,粪便样本内仍可发现活跃新冠病毒。当中,有3名患者在呼吸道样本已侦测不到病毒6日后,验出粪便样本中仍含有具传染性及可复制的新冠病毒。而粪便样本病毒传染性较高者,肠道微生态有较多病原体,及较少能制造短链脂肪酸的益生菌。研究认为,患者出院后须作健康监测,避免病毒经粪便传播。而清除患者肠道内的病毒及改变肠道微生态,或将成为治疗新冠病毒的新方向。

另外,中大医学院自今年3月底起,已开始为机场抵港儿童及有需要人士提供免费粪便检测服务。截至8月底,共计检测逾2000样本,成功识别6名儿童确诊患者,比率为0.28%。

中大医学院院长及肠道微生物群研究中心主任陈家亮指,深喉唾液检测,往往未必有阳性反应,反而粪便样本中已多次验出病毒,相信粪便是导致社区传播的高风险因素之一。且许多婴幼儿患者并无病征,但粪便中病毒量较成人高出多倍,病毒水平相当于成人呼吸道样本,病毒排放时间亦较长。“粪便样本易收集、准确度高,适合婴幼儿及身体不适合做鼻腔或咽喉采样之人士。”他并透露,美国食品药物管理局等机构正与中大进行接洽,会进一步了解粪便检测细节及安排。

中大新冠病毒检测中心同日开始启用,将主要专注于粪便检测,预计每日可提供高达2000个样本检测。

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    2020-09-20 xzw113
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    2020-09-09 Homburg
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    2020-09-08 公卫新人

    新冠肺炎,疫情何时才能消失

    0

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