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10.1038/s41598-021-82787-z

http://scihub22266oqcxt.onion/10.1038/s41598-021-82787-z
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33542443!7862309!33542443
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suck abstract from ncbi


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pmid33542443      Sci+Rep 2021 ; 11 (1): 3134
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  • Saliva is more sensitive than nasopharyngeal or nasal swabs for diagnosis of asymptomatic and mild COVID-19 infection #MMPMID33542443
  • Teo AKJ; Choudhury Y; Tan IB; Cher CY; Chew SH; Wan ZY; Cheng LTE; Oon LLE; Tan MH; Chan KS; Hsu LY
  • Sci Rep 2021[Feb]; 11 (1): 3134 PMID33542443show ga
  • We aimed to test the sensitivity of naso-oropharyngeal saliva and self-administered nasal (SN) swab compared to nasopharyngeal (NP) swab for COVID-19 testing in a large cohort of migrant workers in Singapore. We also tested the utility of next-generation sequencing (NGS) for diagnosis of COVID-19. Saliva, NP and SN swabs were collected from subjects who presented with acute respiratory infection, their asymptomatic roommates, and prior confirmed cases who were undergoing isolation at a community care facility in June 2020. All samples were tested using RT-PCR. SARS-CoV-2 amplicon-based NGS with phylogenetic analysis was done for 30 samples. We recruited 200 subjects, of which 91 and 46 were tested twice and thrice respectively. In total, 62.0%, 44.5%, and 37.7% of saliva, NP and SN samples were positive. Cycle threshold (Ct) values were lower during the earlier period of infection across all sample types. The percentage of test-positive saliva was higher than NP and SN swabs. We found a strong correlation between viral genome coverage by NGS and Ct values for SARS-CoV-2. Phylogenetic analyses revealed Clade O and lineage B.6 known to be circulating in Singapore. We found saliva to be a sensitive and viable sample for COVID-19 diagnosis.
  • |*COVID-19 Nucleic Acid Testing[MESH]
  • |*Specimen Handling[MESH]
  • |Adult[MESH]
  • |COVID-19/*diagnosis[MESH]
  • |Cohort Studies[MESH]
  • |Female[MESH]
  • |Humans[MESH]
  • |Male[MESH]
  • |Nasal Mucosa/*virology[MESH]
  • |Nasopharynx/virology[MESH]
  • |RNA, Viral/*isolation & purification[MESH]
  • |SARS-CoV-2/genetics/isolation & purification[MESH]
  • |Saliva/*virology[MESH]
  • |Sensitivity and Specificity[MESH]


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