Jan. 11, 2022 – Most Americans are aware of the rapid antigen testing of COVID-19 that affects nasal congestion. But some new evidence suggests that a malovu the model may promote test accuracy.
Experts agree on one thing: If you want to test your nose and throat, start the neck first.
When it comes to certification, the FDA recommends following the test guidelines. In other words, move on to the nose now.
“We do not have enough data to show that neck swabs are the right or appropriate way to test at home,” the agency wrote in Jan. 7 on Twitter.
The chief physician of the infectious disease may object.
Robert Wachter, MD, shared a story on Twitter about how his son who had the symptoms pretended he was HIV-negative in a quick nose test. After further examination of many tests, a test of his neck and nose yielded a positive result.
“I’ve been writing about Covid for about 2 years. But this week it became personal when my 28-year-old son found it. The realities of life and the evidence are changing rapidly,” she wrote on Jan. 8.
Wachter is chair of internal medicine at the University of California San Francisco and a contributor to Medscape Medical News, Sister WebMD sister page for medical professionals.
Preprints Helps Testing Saliva
Two recent printing studies support the process of washing saliva. A cautionary tale is that this study was not reviewed by their peers.
The researchers compared the accuracy of the saliva with nose pattern of the 382 people with symptoms who underwent PCR testing.
The results of the rapid saliva test were 100% consistent with the standard laboratory PCR tests performed for Omicron species, Marais and colleagues at the University of Cape Town and the National Health Laboratory Service in South Africa reported.
In contrast, the results of the nasal run test confirmed 86% of the time.
As a result, the authors say, it could mean that we should reconsider the testing that takes place in the suspected cases of COVID-19.
Saliva Seems Very Right
Spitting and neck strokes are not exactly the same, says Christina Wojewoda, MD, chair of the College of American Pathologists Microbiology Committee.
For example, in one of the new studies, participants were given the following instructions:
“Participants should not have food, beverages, tobacco or gum 30 minutes before saliva collection. Students were instructed to cough 3-5 times, closing their mouths and stomachs elbow. He was then asked to hit the inside of both cheeks, top and bottom tongue, mouth and mouth. 30 seconds long is required. “
This technique makes more sense than direct tapping the throat, he said. “To take yourself to the throat … it would be difficult. I was working and spitting.”
More research is needed to “improve” the best way to get saliva, says Wojewoda, who is also the director of the Clinical Microbiology Laboratory at the University of Vermont Medical Center.
“We know quickly strep testing tests that collect accurate samples from the back of the throat is not easy, “says Michael Blaivas, MD, chief medical officer at Anavasi Diagnostics.
This means that medical expertise can make a big difference in collecting samples. A neck brace made by a doctor, nurse, or other health professional is always more accurate than what is done by someone who does not know the right procedure, he said.
Rapid Trials May Need to Be Reflected
Anavasi Diagnostics has a quick test of molecules based on the lower nose that can produce results in 30 minutes.
“The Marais study looked at the PCR of saliva and in the abdomen.[nostril] PCR. This is very different from the saliva antigen test, ”Blaivas said.
“However, if the findings and findings of the study are confirmed by others and it is true that Omicron causes viral discharge from the mouth or saliva beyond the nose, companies will need to consider revising their tests,” he said.
Another Warning for a Nose Test?
Investigators published the opposite printing courses comparing the results of a PCR saliva test and the testing of nasal antigens in 30 people who were diagnosed with the virus as part of a screening program.
Blythe Adamson, Ph.
Wojewoda said: “This study sounds like a lot to me.” We know that PCR is always more complex than antigen testing. “
“So I think this hinders the use of antigen tests’ ‘Oh, wow, I’m in pain today. Let me get an antigen test, and if I have the virus, I feel better, and I need to get a PCR test.’
In contrast, in patients with no symptoms coronavirus, antigen testing appears to be “unsuccessful,” says Wojewoda.
Adamson’s research also confirms the popular belief that “rapid antigen testing is often not enough to detect early-onset infections or symptoms are less likely and the virus is lost,” Blaivas said.
“My medical experience in the emergency department is always shown, first plague, that antigen tests were not reliable in our clinical use, “said Blaivas. about the disease.”
Blaivas encouraged frequent modified applications FDA website which records antigen tests that fail to detect Omicron variability reliably.
Good for Both Worlds?
Some experts recommend neck and nose manipulation, “and there are books that help make this more accurate than just clearing the throat,” Blaivas said.
But, he says, “some tests fail if they come across samples from the nose or neck, if they are not prepared and tested.”