Latest research says combination of throat and nose swabs provides better COVID-19 rapid test results: Nova Scotia Health
In a Canadian first, Nova Scotia researchers say COVID-19 rapid tests that include both throat and nose swabs provide greater accuracy in detecting the virus.
Up until now, the instructions provided by the manufacture has been for nasal swab only.
Now, based on research led by Nova Scotia Health's microbiology team, public health is recommending Nova Scotians using rapid tests swab both their throat and nose when collecting their sample.
In a release Friday, Nova Scotia Health said its working to update the current testing instructions that people receive when they pick up a rapid test.
The research was prompted by public discussion theorizing that a combined sample may produce more accurate results.
Speaking to CTV Thursday, Dr. Todd Hatchette, the chief of the province’s Division of Microbiology, Department of Pathology and Laboratory Medicine, said researchers found using a single swab on a person’s throat first, and then in both nostrils is more effective at detecting Omicron than doing either site alone.
“When we tested just over 1,500 people, we found that either the nose or the throat both detected about 60 per cent of people, but if you did a combined nose / throat, it detected over 82 per cent of people,” said Hatchette.
The research started about a week ago. Officials at the microbiology lab worked with volunteers at the Halifax Convention Centre testing site to collect the data.
In Friday’s release, Nova Scotia Health says collaboration with volunteer-based community rapid testing sites was key to the project’s success and allowed the project to rapidly answer a question that many jurisdictions across the country have been asking.
The investigation compared results of a common rapid take-home test using three sample sites: nasal swab; throat swab and; combined nasal/throat, the release said. All results were confirmed with PCR testing. Compared to PCR test results, samples from nasal or throat swabs each detected 64.5 per cent of cases; however, combining the nose and throat swabs increased sensitivity to 88.7 per cent.
This research project has been submitted for publication.
Dr. Theresa Tam, Canada's chief public health officer, speaking Friday from Ottawa, welcomed the Nova Scotia swab study.
“I’ve asked our laboratory network, our laboratory experts, to take that into account and see whether we can provide some sort of guidance,” Tam said. “But, of course, I think we’ve been discovering that the Omicron variant may be behaving a bit differently to the previous variants, so this approach, this swabbing, might be useful.”
One thing to note, public health is advising that if only one location of the sample is being used, it should be the nasal swab, as the throat swab alone is not as effective as the nasal swab.
Nova Scotia is the first to report research results supporting a combined throat/nose collection method for self-administered rapid antigen tests.
CTVNews.ca Top Stories
Most of Canada to receive emergency alert test today
The federal government will test its capacity to issue emergency alerts today, with the exception of Ontario, where the test will take place on May 15.
OPINION What King Charles' schedule being too 'full' to accommodate son suggests about relationship with Prince Harry
Prince Harry, the Duke of Sussex, has made headlines with his recent arrival in the U.K., this time to celebrate all things Invictus. But upon the prince landing in the U.K., we have already had confirmation that King Charles III won't have time to see his youngest son during his brief visit.
Ontario man devastated to learn $150,000 line of credit isn't insured after wife dies
An Ontario man found out that a line of credit he thought was insured actually isn't after his wife of 50 years died.
Boy Scouts of America is rebranding. Here's why they've changed their name
After more than a century, Boy Scouts of America is rebranding as Scouting America, another major shakeup for an organization that once proudly resisted change.
Trial begins for Winnipeg serial killer who claims he was mentally ill
The trial of a man who admits he killed four women in Winnipeg is set to begin Wednesday, and a law professor says lawyers for Jeremy Skibicki have multiple hurdles to clear for a defence of mental illness.
New Canadian study could be a lifesaver for thousands suffering from CTE
A first-of-its-kind Canadian research study is working towards a major medical breakthrough for a brain disorder, believed to be caused by repeated head injuries, that can only be detected after death.
Rape, terror and death at sea: How a boat carrying Rohingya children, women and men capsized
In March, Indonesian officials and local fishermen rescued 75 people from the overturned hull of a boat off the coast of Indonesia. Until now, little was known about why the boat capsized.
Stormy Daniels describes meeting Trump during occasionally graphic testimony in hush money trial
With Donald Trump sitting just feet away, Stormy Daniels testified Tuesday at the former president's hush money trial about a sexual encounter the porn actor says they had in 2006 that resulted in her being paid to keep silent during the presidential race 10 years later.
These adults born in the '90s partnered with their parents to buy homes in Ontario
An Ontario woman said it would have been impossible to buy a house without her mother – an anecdote that animates the fact that over 17 per cent of Canadian homeowners born in the ‘90s own their property with their parents, according to a new report.