Pneumococcal Antibody Titration by Serological Cross-Immunoassay (Serum)

Why This Test Matters

Pneumococcal bacteria are common causes of serious infections, especially in people with weakened immune systems, young children, or the elderly. This test helps doctors check if your immune system has developed enough antibodies to protect you from these infections, particularly after receiving a pneumococcal vaccine.

When You Might Need This Test

Your doctor may recommend this test if you’ve had a pneumococcal vaccine but have symptoms of infection, if you’re at high risk for pneumococcal diseases (like those with chronic illnesses or immune deficiencies), or if you’re being evaluated for long-term immunity after vaccination.

How the Test Works

A small blood sample is taken from your arm and sent to a lab. The serum is tested using a method called immunoassay to measure the exact amount of antibodies specific to pneumococcal bacteria. This helps determine if your immune response is strong enough to protect you.

Sample Collection and Preparation

You’ll have a needle inserted into your vein to draw blood. The blood is then processed to separate the serum, which is sent to the lab for testing. No special preparation is needed, but avoid eating or drinking for a few hours before the test if instructed.