Can A Strep Test Be Wrong?

What illness mimics strep throat?

What can be confused with strep throat?Mononucleosis (which also features swollen glands, fever, and skin rash)Lyme disease (from a tick bite)Mumps (caused by a virus).

Can I have strep throat without a fever?

Yes, you can have strep throat without having a fever. Doctors will commonly look for five primary signs in the first stage of diagnosing strep throat: No Cough. If you have a sore throat, but aren’t coughing, it could be a sign of strep.

Can you test negative for strep and still have it?

The rapid strep test can give false-negative results even when strep bacteria are present. When the results of a rapid strep test are negative, many doctors recommend doing a throat culture to make sure that strep throat is not present. Neisseria meningitidis. This bacteria can cause meningitis.

How often is a strep test wrong?

The clinical issue is that rapid strep tests have very high specificity – in the range of 98 percent to 99 percent – so there are very few false positives. However, the sensitivity of most current rapid strep tests ranges from 90 percent to 95 percent, so there is a greater chance of false negatives.

Are strep tests always accurate?

Most rapid strep tests have a sensitivity of 95%, meaning that the test will be positive in 95 of 100 patients who are documented to have strep throat via throat culture obtained at the same time.

What causes false negative strep test?

Rapid strep tests can cause a false-negative result even when strep is actually the cause of the infection for several reasons: Incorrect swab collection most commonly by accidentally extracting saliva from the tongue on the swab or from not swabbing the back of the throat correctly.