Doctor's Assessment Included
Every result includes a professional assessment from a BIG-registered doctor. For treatment decisions, discuss your results with your GP.
CMV IgM
A CMV IgM test detects IgM antibodies against cytomegalovirus (CMV) in your blood. A positive result may indicate a recent or active CMV infection, as IgM antibodies are typically the first to appear after initial exposure to the virus.
What It Measures
This test detects the presence of IgM antibodies directed against cytomegalovirus in your blood. IgM antibodies are the first antibodies produced by the immune system during an initial or reactivated CMV infection. Their presence may suggest a recent primary infection or viral reactivation.
Why It Matters
Identifying a recent CMV infection is particularly important during pregnancy, as a primary infection may be associated with complications for the unborn child. It is also relevant for immunocompromised individuals, in whom CMV reactivation can cause significant illness. Results should be interpreted by a healthcare professional alongside other clinical findings.
When to Test
Testing may be recommended if you are pregnant and have been exposed to CMV, if you are immunocompromised and experiencing symptoms, or if a recent CMV infection is suspected. Consult a healthcare professional for guidance.
Lifestyle Tips
Maintain good hand hygiene and avoid sharing personal items during an active infection. If you are pregnant, minimise contact with young children's saliva and urine, as they are common sources of CMV transmission. Support your immune system through a healthy diet, regular exercise, and sufficient rest.
Frequently Asked Questions
How long do CMV IgM antibodies remain detectable?
CMV IgM antibodies can remain detectable for several months after the initial infection. In some cases, they may persist longer, which can complicate interpretation. Your healthcare professional will consider the clinical context and may recommend follow-up testing.
Can CMV IgM be positive due to viral reactivation?
Yes, in some individuals CMV IgM antibodies may become detectable again during viral reactivation, not just during a primary infection. This is more common in immunocompromised individuals. A healthcare professional can help distinguish between primary infection and reactivation.