1) The lower respiratory tract is protected by all of the following EXCEPT

A) competition with the normal flora of the lungs.

B) IgA antibodies.

C) mucous secretions.

2) Which of the following is mismatched?

A) pharyngitis — sore throat

B) laryngitis — voice loss

C) epiglottitis — sore throat

3) Members of the group A streptococci (GAS) cause all of the following EXCEPT

A) strep throat.

B) scarlet fever.

C) rheumatic fever.

D) pharyngitis.

E) epiglottitis.