Total IgG Antibody to Tick-Borne Encephalitis Virus (Serum)

This test checks your blood for signs of tick-borne encephalitis, a viral infection that can affect the brain and nervous system. Your doctor may order it if you have symptoms after a tick bite or after spending time in an area where the virus is common, so that treatment and careful monitoring can begin as early as possible.

Your healthcare provider may order this test if you’ve traveled to areas with tick-borne encephalitis risk, have symptoms like fever, headache, or neurological issues after a tick bite, or if you’re evaluating symptoms that could relate to a viral infection.

Before the test, tell your healthcare provider about all medicines you take, especially blood thinners, and mention any recent vaccines or illnesses. Fasting is usually not required. Wear clothing with a sleeve that can be rolled up easily, since a small blood sample will be drawn from a vein in your arm.

No special preparation is needed. A blood sample is drawn from a vein, typically in your arm. You may feel slight discomfort, but it usually lasts only a few minutes.

Results show whether antibodies against the tick-borne encephalitis virus were detected in your blood. A positive result usually suggests a current or past infection, while a negative result means no infection was found. Your doctor will interpret the results alongside your symptoms, vaccination history, and travel history before recommending any next steps.

Positive results indicate the presence of antibodies, suggesting past infection or vaccination. Negative results mean no detectable antibodies, which could mean you’ve never been exposed or vaccinated. Results alone don’t confirm active infection; they’re used alongside clinical findings.

Early symptoms often include fever, headache, muscle aches, and unusual tiredness. In more serious cases, the infection can progress to confusion, a stiff neck, sensitivity to light, tremors, seizures, or weakness in the arms and legs. Seek medical care right away if you develop a severe headache or neurological symptoms after a tick bite.

Symptoms may include fever, severe headache, stiff neck, confusion, muscle weakness, or neurological issues like seizures or paralysis. These symptoms can appear days to weeks after tick exposure.