Fifth Disease - Exams and Tests

A health professional usually diagnoses fifth disease by observing its distinctive rash , by asking about any history of exposure to the disease, and by conducting a physical exam. Viral tests may be done to confirm a recent infection (within the past 3 months) by the presence of certain antibodies. In addition, a complete blood count (CBC) may be done to help rule out a bacterial infection or to check for anemia.

Diagnosing fifth disease during pregnancy

A pregnant woman may have a blood test for parvovirus B19 antibodies if she is exposed to or has symptoms of fifth disease. The blood test may indicate that she has:

Had the disease in the past and is now immune.
Not had the disease in the past and does not have immunity. She should avoid exposure to parvovirus B19.
Recently contracted the disease and should be closely monitored throughout her pregnancy. This may include frequent fetal ultrasounds.

WebMD Medical Reference from Healthwise

Last Updated: March 07, 2007

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