A)is transmitted by contact with saliva of an infected person.
B)can cause inflammation of the testicles.
C)mainly occurs in adolescents and young adults in developed countries.
D)can cause encephalitis in a small percentage of cases.
E)all of the above.

A)a potent exotoxin.
B)an immunological cross-reaction.
C)the spread of bacteria from the pharynx to the bloodstream.
D)toxin production in joints.
E)bacterial infection of the endocardium.

A)is a loss of calcium from the bones in elderly people.
B)is an infection of bones.
C)is usually asymptomatic.
D)cannot be treated with antibiotics.
E)most often follows a systemic viral infection.