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Cell子刊:新冠7个月后,粪便中依然存在病毒残留物

2022-04-21 医诺维 医诺维

疫情两年多以来,我们已经认识到,新冠不只是一种呼吸系统疾病,而是会影响人体多个组织和器官。

随着新冠病毒的大规模流行,新的病毒突变株不断出现,目前全世界最关注的当属Omicron突变株,Omicron变异病毒正在全球掀起另一波腥风血雨,国内疫情升温,多城遭重新封锁。

疫情两年多以来,我们已经认识到,新冠不只是一种呼吸系统疾病,而是会影响人体多个组织和器官。

2022年4月12日,美国斯坦福大学的研究人员在 Cell 子刊" Med "期刊上发表了一篇题为"Gastrointestinal symptoms and fecal shedding of SARS-CoV-2 RNA suggest prolonged gastrointestinal infection"的研究论文。

该研究表明,即使呼吸道已经检测不到病毒,4个月后,仍有12.7%的参与者粪便中检测到新冠病毒 RNA 残留物,7个月后,依然有3.8%的参与者粪便中存在病毒RNA,胃肠道症状(腹痛、恶心、呕吐)与粪便排出的 SARS-CoV-2 RNA 有关。

在该研究中,研究人员利用2020年5月在斯坦福大学启动的早期临床试验来测试一种可能的治疗轻度 COVID 感染的方法。监测了110多名患者以跟踪其症状的演变,并定期收集粪便样本作为追踪病毒脱落的一部分。

许多其他研究都集中在重症 COVID 患者的病毒脱落上,然而,这项研究首次评估了从轻度至中度 COVID 患者收集的粪便样本中是否存在病毒 RNA。

研究发现,在诊断后的第一周后,有49%的患者粪便中有新冠病毒 RNA 残留物。

在诊断后四个月时,当他们的肺部不再有新冠病毒时,仍有12.7%的患者继续在粪便中排出病毒RNA。

在初次诊断七个月后,依然有3.8%的参与者粪便中存在病毒RNA。

研究人员指出,RNA构成了冠状病毒的遗传残留物,而不是真正的活病毒,因此人的粪便不太可能具有传染性。

研究人员表示,肠道中挥之不去的 COVID 病毒确实表明了对长期疾病的一种潜在影响。

此外,研究人员表示,SARS-CoV-2 在肠道甚至其他组织中停留的时间可能比在呼吸道中停留的时间更长,它基本上可以继续刺激我们的免疫系统并诱导一些长期后果。

美国国家传染病基金会医学主任表示,长期 COVID 已成为一个既定问题,以至于许多主要医疗中心都建立了自己的长期 COVID 诊所,试图找出症状和潜在的治疗方法。很大一部分从 COVID 急性恢复的人仍然有挥之不去的症状,并且可能涉及一系列不同的器官系统。

作者表示,这些数据增加了这样一种观念,即肠道中的细胞本身可能与 COVID 病毒感染有关,它们可能是某些症状的促成因素,如腹痛、恶心、呕吐,这可能是一方面长期 COVID 症状。

原始出处:

Aravind Natarajan, et al. Gastrointestinal symptoms and fecal shedding of SARS-CoV-2 RNA suggest prolonged gastrointestinal infection. Med, 2022.

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    2023-02-14 维他命
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    2022-04-22 Homburg

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