Rapid testing for Omicron: Is a nose swab enough? | Inquirer News

Rapid testing for Omicron: Is a nose swab enough?

/ 11:55 PM January 10, 2022

Rapid antigen testing drive for the coronavirus disease (COVID-19) in Bangkok

A health worker in personal protective equipment (PPE) takes a swab sample from a police officer for a rapid antigen test amid the coronavirus disease (COVID-19) outbreak, in Bangkok, Thailand, Jan. 7, 2022. (REUTERS/Chalinee Thirasupa)

The fast-spreading Omicron variant has made us more reliant on rapid at-home antigen tests to tell us if we have COVID-19. But should we be swabbing our throats as well as our noses?

For now, the guidance depends on where you live.

Article continues after this advertisement

Some scientists have said people can transmit Omicron when it has infected their throat and saliva but before the virus has reached their noses, so swabbing the nostrils early in the infection will not pick it up.

FEATURED STORIES

A small recent U.S. study backed up that view. PCR tests of the saliva from 29 people infected with Omicron detected the virus on average three days before nose samples were positive in antigen, or so-called lateral flow, tests.

In general, rapid tests have a lower sensitivity than lab-processed PCR tests, meaning they produce more false negatives. But if you test positive, you almost certainly have COVID-19, making antigen tests a powerful tool in tackling the pandemic as demand for PCR tests due to Omicron overwhelms laboratories.

Article continues after this advertisement

As a result of recent studies, some experts in the United States have now advised antigen test users should swab the throat before swabbing the nose.

Article continues after this advertisement

All the antigen tests with emergency use authorizations from the U.S. Food and Drug Administration use nasal samples and it has expressed concerns over the safety of throat swabbing at home, saying users should follow manufacturers’ instructions.

Article continues after this advertisement

In Israel, a top health official has said people self-testing for COVID-19 should swab their throat as well as their nose when using rapid antigen tests, even if it goes against instructions issued by the manufacturer.

Some other countries, including the United Kingdom, have approved rapid antigen tests that swab both the throat and nose, or just the nose.

Article continues after this advertisement

In Germany, the minister for health has said they will study how reliable rapid antigen tests are in detecting the Omicron variant and publish a list of the most accurate products.

Your subscription could not be saved. Please try again.
Your subscription has been successful.

Subscribe to our daily newsletter

By providing an email address. I agree to the Terms of Use and acknowledge that I have read the Privacy Policy.

TAGS: COVID-19 Testing, swab test

Your subscription could not be saved. Please try again.
Your subscription has been successful.

Subscribe to our newsletter!

By providing an email address. I agree to the Terms of Use and acknowledge that I have read the Privacy Policy.

© Copyright 1997-2024 INQUIRER.net | All Rights Reserved

This is an information message

We use cookies to enhance your experience. By continuing, you agree to our use of cookies. Learn more here.