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10.1136/thoraxjnl-2020-215042

http://scihub22266oqcxt.onion/10.1136/thoraxjnl-2020-215042
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32963115!ä!32963115

suck abstract from ncbi


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pmid32963115      Thorax 2021 ; 76 (1): 61-63
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  • Upper respiratory viral load in asymptomatic individuals and mildly symptomatic patients with SARS-CoV-2 infection #MMPMID32963115
  • Ra SH; Lim JS; Kim GU; Kim MJ; Jung J; Kim SH
  • Thorax 2021[Jan]; 76 (1): 61-63 PMID32963115show ga
  • BACKGROUND: Asymptomatic individuals with SARS-CoV-2 infection have viable viral loads and have been linked to several transmission cases. However, data on the viral loads in such individuals are lacking. We assessed the viral loads in asymptomatic individuals with SARS-CoV-2 infection in comparison with those in symptomatic patients with COVID-19. METHODS: Study participants were recruited from a community facility designated for the isolation of patients with mild COVID-19 in South Korea. The presence of symptoms was evaluated with a questionnaire-based survey. Viral loads in the upper respiratory tract were measured with real-time reverse transcription-PCR (RT-PCR) targeting the E, RdRp and N genes of SARS-CoV-2, with a cycle threshold (Ct) value of 40 for determining positivity. RESULTS: In 213 patients with SARS-CoV-2 infection, 41 (19%) had remained asymptomatic from potential exposure to laboratory confirmation and admission; of them, 39 (95%) underwent follow-up RT-PCR testing after a median 13 days. In 172 symptomatic patients, 144 (84%) underwent follow-up RT-PCR testing. Twenty-one (54%) asymptomatic individuals and 92 (64%) symptomatic patients tested positive for SARS-CoV-2 at follow-up. Asymptomatic individuals and symptomatic patients did not show any significant differences in the mean Ct values of the E (31.15 vs 31.43; p>0.99), RdRp (32.26 vs 32.93; p=0.92) and N (33.05 vs 33.28; p>0.99) genes. CONCLUSION: Approximately one-fifth of the individuals without severe symptoms were asymptomatic, and their viral loads were comparable to those in symptomatic patients. A large proportion of mildly symptomatic patients with COVID-19 or asymptomatic individuals with SARS-CoV-2 showed persistent positive upper respiratory RT-PCR results at follow-up.
  • |*Viral Load[MESH]
  • |Adult[MESH]
  • |COVID-19/epidemiology/*virology[MESH]
  • |Female[MESH]
  • |Humans[MESH]
  • |Male[MESH]
  • |Middle Aged[MESH]
  • |Republic of Korea/epidemiology[MESH]
  • |Respiratory System/*virology[MESH]
  • |SARS-CoV-2/*physiology[MESH]


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