Understanding Lab Tests for Varicella Pneumonitis
Written by Private MD Labs Medical Writing Team • Last Updated: September 8, 2025
Varicella pneumonitis is a rare but serious lung complication that can occur with chickenpox (varicella-zoster virus infection). While the diagnosis is primarily made through clinical examination and imaging, blood tests play a crucial supporting role in confirming the underlying viral infection and assessing the body's immune response.
Recommended Test
Varicella-Zoster Virus (VZV) Antibodies, IgG (Chickenpox)
This test measures IgG antibodies against the varicella-zoster virus in the blood. High levels of VZV IgG antibodies can indicate an active or recent infection with the varicella-zoster virus, which is essential information when varicella pneumonitis is suspected as a complication of chickenpox.
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Why Blood Testing is Important for Varicella Pneumonitis
There is no single blood test to diagnose varicella pneumonitis itself, as this condition is typically identified through clinical symptoms and chest imaging. However, lab testing is fundamental for confirming the presence of varicella-zoster virus infection, which is the underlying cause of this potentially life-threatening lung complication.
Understanding the Test Results
The VZV IgG antibody test helps healthcare providers confirm that a patient has been exposed to or is currently fighting a varicella-zoster virus infection. This information, combined with clinical symptoms and imaging findings, supports the diagnosis of varicella pneumonitis and guides appropriate antiviral treatment decisions.
Important Considerations
The information here is for educational purposes only and is not a substitute for professional medical advice. Always consult with a healthcare provider for diagnosis and treatment.
