The SalivaDirect test detects the presence of SARS-CoV-2 RNA (the genetic material of the virus) in saliva.
In comparisons (New window) using standard nasopharyngeal swabs, this test correctly identified 32 of 34 positive samples and 30 of 33 negative samples.
The researchers claim that this test is less invasive than nasopharyngeal swabs, does not require the intervention of a medical expert and does not require any of the chemicals commonly used to extract and store RNA. .
They estimate that each test would cost less than US $ 5 and ask the US Food and Drug Administration to grant them urgent approval.
Saliva testing under development in Canada
Earlier this summer, researchers in Saskatchewan announced plans to test for SARS-CoV-2 in saliva, which would yield results in just a few minutes.
This test, developed by the University of Saskatchewan and the University of Regina, aims to detect SARS-CoV-2 proteins and peptides in saliva. According to researchers, it may be available in March 2021
For their part, British Colombian researchers based in Kelowna in the spring said they were working to create a saliva detection test that would also take just a few minutes.
The test would use molecules that attach to the S protein (nail protein) on the surface of the virus to detect it. They think they can finish it by the end of the year.
The University of Victoria and the company ImmunoPrecise Antibodies are also trying to create a test of saliva with technology designed to detect the Zika virus.
A saliva sample was placed on a thin strip, which would change color when the virus was detected. The researchers also hope that their test will be completed by the end of 2020.
Source: Radio Canada | Science