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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Delayed tuberculin test response is due to-
assistant
The correct answer is  Tuberculin test is type IV hypersensitivity reaction. Delayed or cell mediated hypersensitivity is a cell mediated response. The antigen activates specifically sensitised CD4 & CD8 T lymphocytes leading to the secretion of lymphokines and phagocyte accumulation. Reference : Anathanarayan & paniker's 9th edition, pg no: 162 <\p>