Fifth disease (Parvovirus B19)
Fifth disease, also known as erythema infectiosum, is a common and usually mild childhood illness caused by a virus. It's best known for its distinctive bright red rash on the cheeks, giving it a 'slapped cheek' appearance. While generally harmless, it can be more serious for pregnant women or individuals with certain blood disorders.
Common symptoms
- Bright red rash on the cheeks ('slapped cheek' appearance)
- Lacy, net-like rash on the arms, legs, and trunk
- Low-grade fever
- Headache
- Runny nose
- Sore throat
- Joint pain (more common in older children and adults)
- Fatigue
Cause
Fifth disease is caused by the human parvovirus B19.
How common is it?
Fifth disease is one of the most common childhood viral rashes. Studies estimate that 40-60% of adults show evidence of past infection, indicating widespread childhood exposure. Peak incidence occurs in children ages 5-14, with outbreaks most common in late winter and early spring.
Treatment
There is no specific antiviral treatment for Fifth disease. Treatment focuses on relieving symptoms with over-the-counter pain relievers and fever reducers like acetaminophen or ibuprofen. Encourage your child to rest and drink plenty of fluids.
Prevention
Fifth disease spreads through respiratory droplets when an infected person coughs or sneezes. Frequent handwashing is crucial to prevent its spread. While there's no vaccine, keeping your child home when they have a fever or are feeling unwell can help limit transmission, especially before the rash appears when they are most contagious.
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Medical disclaimer: Educational only. Always consult a healthcare provider for diagnosis and treatment.