Explain the steps needed to activate a B cells to produce antibodies. Start from extracellular antigen recognition by the B-cell.  Be sure to include the specific receptor interactions taking place.

Formation of a pseudomembrane in the back of the throat is seen in: 

Prions are ___ (select all)

What is a logical use for Bacitracin?

Which form a plague leads to black purpura along the extremities? 

Explain the steps necessary to create an antibiotic resistant infection?  

Which bacteria causes community acquired walking pneumonia?

Which drug will be most effective against malaria?

Rickettsia riskettsii causes Rocky mountain spotted fever and is acquired by a _____ vector.  

  Before submitting your exam, show your “show your work sheets” to the camera.