system
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
Earliest feature of TB:-
assistant
The correct answer is  (C.) - Ingestion of mycobacterium tuberculosis inside the lung will cause stimulation in the no. of lymphocytes, that will cause lymphocytosis First cell in the lung which will be affected by myco. TB infection is alveolar macrophage Transmission of myco. TB - cough & sneeze (droplet infection) (A.) - TB infection is characterized by type 4 hypersensitivity reaction Type 4 hypersensitivity reaction- granuloma formation - LANGHAN's CELL (B.) - Langerhan's cell - giant cell found in the skin. (D.) - type of necrosis seen in TB is CASEOUS NECROSIS.