A 58-Year-Old Asymptomatic Woman Comes to the Office for a Health

A 58-year-old asymptomatic woman comes to the office for a health checkup prior to starting volunteer work at a hospital.  She has a history of hypothyroidism and takes levothyroxine.  She does not use tobacco, alcohol, or illicit drugs.  Her examination findings are unremarkable.  During a laboratory test, her white blood cells are incubated with mycobacterial antigens.  Compared to the control, a large amount of interferon-gamma is detected in her blood sample.  Which of the following cell types is most directly responsible for this finding?

A) B lymphocytes
B) Basophils
C) Eosinophils
D) Monocytes
E) Neutrophils
F) T lymphocytes

Correct Answer:

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