Koch Developed Tuberculin,which He Hoped Would Be a Vaccine Against

Question

Koch developed tuberculin,which he hoped would be a vaccine against tuberculosis.Tuberculin is:
A)the current vaccine used against tuberculosis
B)responsible for definitively proving that one organism causes one disease
C)administered as a skin test to diagnose tuberculosis
D)an exception to germ theory

Accepted Answer

Tuberculin is not a vaccine, but rather a purified protein derivative (PPD) of the bacteria that causes tuberculosis. It is administered as a skin test to diagnose whether a person has been exposed to tuberculosis by measuring their immune response to the PPD.