Varicella Zoster Virus (VZV) IgG Titer Test

The Varicella Zoster Virus (VZV) IgG titer test is a blood test that measures the level of antibodies to the varicella zoster virus in the blood. This test is used to determine if a person has had a previous infection with the virus, which causes chickenpox and shingles.

A positive result for VZV IgG antibodies indicates that a person has been exposed to the virus in the past and has developed immunity to it. This can help determine if a person has had chickenpox in the past or if they have received the varicella vaccine.

A negative result for VZV IgG antibodies indicates that a person has not been exposed to the virus or has not developed immunity to it. In this case, the person may be susceptible to developing chickenpox if exposed to the virus.

This test is commonly used to assess immunity to varicella in pregnant women, healthcare workers, and individuals who are at risk for severe complications from the virus. It can also be used to confirm a suspected case of chickenpox or shingles.