In T.B cell mediated immunity is by_______________?
Correct answer: A. CD 4*
- A. CD 4*
- B. CD 8*
- C. B - lymphocytes
- D. None of the above
Explanation
Protection against tuberculosis is mainly cell-mediated and is initiated by CD4 helper T cells, especially Th1 cells, which activate infected macrophages through interferon-gamma. B lymphocytes mediate antibody responses rather than the principal protective response in TB.
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Practise Immunology
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