children s health issues
Erythema Infectiosum (Parvovirus B19 Infection)
Diagnosis of Erythema Infectiosum
A doctor's evaluation Sometimes blood tests If infection occurs during pregnancy, ultrasonography of the fetus A doctor bases the diagnosis of erythema infectiosum on the characteristic appearance of the rash. Blood tests are done only in children who have a known blood disorder or an impaired immune system. If infection occurs during pregnancy, blood tests are done in pregnant people to measure antibodies. The presence of certain antibodies tells doctors whether the pregnant person has been infected before or is currently or was recently infected. Pregnant people who may have been recently infected have an ultrasound to assess the fetus. 