Final answer:
The Single ID comparative cervical tuberculin test (SICCT) is a diagnostic test used to detect tuberculosis infection. It involves the injection of bacterial proteins from M. tuberculosis into the skin. A positive test indicates a cellular immune response to the bacteria.
Step-by-step explanation:
The Single ID comparative cervical tuberculin test (SICCT) is a diagnostic test used to detect tuberculosis infection. It involves the injection of bacterial proteins from M. tuberculosis into the skin. A positive test is indicated by a raised red area called an induration, which signifies a cellular immune response to the bacteria. This test helps confirm infection in cases where symptoms or radiographic findings suggest the presence of tuberculosis.