Delayed tuberculin test response is due to_______________?
Correct answer: B. T lymphocytes
- A. B lymphocytes
- B. T lymphocytes
- C. Monocytes
- D. Histiocytes
Explanation
The tuberculin reaction is a delayed-type hypersensitivity response mediated mainly by sensitised T lymphocytes, which release cytokines that recruit macrophages. B cells and histiocytes are not the primary initiators of this response.
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