Full formMedical & Health
PPDstands forPurified Protein Derivative
Full Form of PPD
What is PPD?
Purified Protein Derivative (PPD) is a sterile solution of proteins extracted from the tuberculosis bacterium Mycobacterium tuberculosis. It is used as the antigen in the Mantoux test or tuberculin skin test, which is a standard diagnostic tool to detect latent or active tuberculosis infection. In India, where tuberculosis remains a major public health concern, the PPD test is widely employed in hospitals, clinics, and community health camps for screening high-risk populations, including contacts of TB patients and healthcare workers. The test involves injecting a small amount of PPD into the skin of the forearm and measuring the induration after 48–72 hours. A positive reaction indicates prior exposure to the TB bacteria, but it does not distinguish between latent infection and active disease. PPD is also utilized in veterinary medicine for testing cattle. For medical students and professionals preparing for examinations like NEET PG or AIIMS, understanding the PPD test’s procedure, interpretation, and limitations is essential, as it frequently appears in microbiology and tuberculosis-related questions.
PPD का फुल फॉर्म
शुद्ध प्रोटीन व्युत्पन्न
Example
The doctor recommended a PPD test for the patient who had a persistent cough and history of close contact with a TB case.
PPD — frequently asked questions
What is the full form of PPD?
PPD stands for Purified Protein Derivative, a substance used in the tuberculin skin test to check for tuberculosis infection.
How is the PPD test performed in India?
A small amount of PPD is injected just under the skin of the forearm. After 48 to 72 hours, the injection site is examined for swelling, which indicates a reaction to tuberculosis antigens.
What is the difference between PPD and BCG?
PPD is a purified antigen used for testing exposure to TB, while BCG is a live attenuated vaccine given to prevent severe forms of tuberculosis, especially in children.