The tuberculin skin test in cattle primarily detects:
Correct answer: C. Delayed cellular hypersensitivity
- A. Immediate IgE-mediated allergy
- B. Circulating bacterial endotoxin
- C. Delayed cellular hypersensitivity
- D. Neutralizing serum antibody
Explanation
The tuberculin test measures a delayed-type cellular immune response to mycobacterial antigens, usually becoming evident after local skin swelling. It does not primarily measure serum antibody or an immediate IgE reaction.
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About Veterinary Microbiology and Immunology
Covers the structure, classification, growth and transmission of bacteria, viruses, fungi and other disease causing microorganisms in animals. It explains innate and acquired immunity, antibodies, antigens, vaccination, hypersensitivity and diagnostic methods, while distinguishing infectious agents from the immune responses they produce.
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