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Hypersensitivity Specific examples Single ID comparative cervical tuberculin test (SICCT) What happens to animals that are positive for Mycobacterium bovis in SICCT?

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Final answer:

Animals that test positive for Mycobacterium bovis in SICCT have been exposed to the bacteria and exhibit a cellular immune response.

Step-by-step explanation:

Animals that are positive for Mycobacterium bovis in the Single ID comparative cervical tuberculin test (SICCT) have been exposed to the bacteria and exhibit a cellular immune response to it. A positive test is indicated by a raised red area called an induration a couple of days after the test. This induration is a consequence of the accumulation of activated macrophages.

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