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A 42 year old women comes to physician for a physical examination required for employment as a nurse. She receives an inradermal inoculation of tuberculin. She says that she was vaccinated wtih BCG two years ago while serving in the peace corps. At 48 hours after the tuberculin inoculation there is an 8 m zone of erythema and induration over the injection site. What is the immune effector mechanisms most likely responsible for this reaction?

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The General Principles section of the USMLE covers these topics:
Biochemistry
Genetics
Microbiology
Pathology
Pharmacology


1. A 42 year old women comes to physician for a physical examination required for employment as a nurse. She receives an inradermal inoculation of tuberculin. She says that she was vaccinated wtih BCG two years ago while serving in the peace corps. At 48 hours after the tuberculin inoculation there is an 8 m zone of erythema and induration over the injection site. What is the immune effector mechanisms most likely responsible for this reaction?





 
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