Where does your COVID test go after it leaves your nose? From swab to results, take a look at how COVID tests are handles, and why results can take so long:
"You'd be surprised by what the time delays are," says Dan Milner, MD, chief medical officer for the American Society for Clinical Pathology, an organization for lab professionals.
In Tucson, AZ, at Paradigm Site Services, which contracts with local governments, businesses, and others to provide testing, 4,000 tests a day are done, compared to a daily tally of 1,000 in early November, says Steven Kelly, CEO.Swab Collection, Pickup, Transport Lab staffing is another factor. As the demand for tests has increased, laboratories are having a hard time adding enough staff. Requirements differ from state to state, Garner says, but those analyzing the tests must be clinical lab scientists with training and experience. And like other businesses, laboratories are dealing with employees who contract COVID-19 and must leave work to isolate.
Special chemicals and enzymes are added. A PCR machine called a thermal cycler performs a series of heating and cooling steps to analyze the specimen. The PCR technology allows scientists to amplify small amounts of the RNA from the specimens intoOne of the chemicals produces a fluorescent light if the virus is in the sample. That signal is detected by the PCR machine.
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