A blood test that detects antibodies against diphtheria, tetanus and pertussis.
Helps diagnose protection after DPT vaccination. A positive result shows that the body has been exposed to the infection; your doctor will interpret it with your symptoms.
Recurrent or unusual infections, or monitoring of immune status — as advised by a doctor.
No fasting needed.
This article is for general information and education only. It is not medical advice, does not create a doctor–patient relationship, and is not a substitute for consultation with a qualified doctor who has assessed your individual situation. Never delay seeking medical advice because of something you have read here.
In a medical emergency, call 112, or 108 for an ambulance where that service operates, or go to your nearest emergency department. If you are in mental health distress, Tele-MANAS is free and available 24×7 on 14416.
Read our Editorial Policy and Medical Review Process.
Antibodies take some days to weeks to appear after infection, so your doctor may time or repeat the test based on when symptoms began.
No fasting is needed. You can eat and drink normally unless your doctor has advised otherwise.
Blood sample taken from a vein in your arm.
Usually within 10–11 days after the sample reaches the lab. You will receive the report online.