RE: Test Sensitivity9 May 2020 23:50
I was reading a few clinical studies on viral loads from salivary samples to get an idea, and the conclusion I get is that this virus multiplies very aggressively once we catch it, yet the symptoms may not show for many days. The viral load in saliva is very high from early stages, which helps to contaminate others.
Here is on of the academic articles you can easily find in google scholar:
Detection of SARS-associated Coronavirus in Throat Wash and Saliva in Early Diagnosis
Wei-Kung Wang, Shey-Ying Chen, [...], and National Taiwan University Hospital
Additional article information
Abstract
The severe acute respiratory syndrome–associated coronavirus (SARS-CoV) is thought to be transmitted primarily through dispersal of droplets, but little is known about the load of SARS-CoV in oral droplets. We examined oral specimens, including throat wash and saliva, and found large amounts of SARS-CoV RNA in both throat wash (9.58 x 102 to 5.93 x 106 copies/mL) and saliva (7.08 x 103 to 6.38 x 108 copies/mL) from all specimens of 17 consecutive probable SARS case-patients, supporting the possibility of transmission through oral droplets. Immunofluorescence study showed replication of SARS-CoV in the cells derived from throat wash, demonstrating the possibility of developing a convenient antigen detection assay. This finding, with the high detection rate a median of 4 days after disease onset and before the development of lung lesions in four patients, suggests that throat wash and saliva should be included in sample collection guidelines for SARS diagnosis.
Keywords: severe acute respiratory syndrome, SARS, coronavirus, CoV, Taiwan, perspective
Severe acute respiratory syndrome (SARS) is an emerging infectious disease that spread rapidly from China to >30 countries, including Canada, Singapore, Vietnam, and Taiwan, in the first half of 2003 (1–5). In the latest update from the World Health Organization, the number of probable SARS cases is 8,096 (5). The etiologic agent of SARS has been identified as the novel SARS-associated coronavirus (SARS-CoV) (6–9). The disease is highly contagious and has ...