Journal of Urgent Care Medicine

Positive Measles Test May Actually Indicate Recent Vaccine

A recent report from the Centers for Disease Control and Prevention (CDC) found polymerase chain reaction (PCR) tests that simultaneously test for multiple causes of a rash may show false positives for measles in children who recently had a dose of the measles, mumps, rubella (MMR) vaccine. About approximately 5% of kids experience a rash 7–10 days after the MMR shot. A study of 1,548 syndromic PCR panels from the Tennessee Department of Health found 14 children …

False Positives Common with Some Zika Tests, FDA Warns

Urgent care clinicians have been told to test, or refer for testing, pregnant patients who could have been exposed to Zika virus (or had sexual relations with a partner would could have been exposed). Now the Food and Drug Administration says some such patients could have tested positive for Zika even though they don’t actually have not been infected. LabCorp’s ZIKV Detect test, specifically, should not be relied on to make “significant patient management decisions,” …