Viral Infection: Pneumonia

Question 1

How are the types of influenza classified?

Answer 1

Types A, B, or C, classified according to internal proteins

Question 2

Which types of influenza are pathogenic to humans?

Answer 2

Types A and B

Question 3

Which type of influenza has subtypes? How are these subtypes determined?

Answer 3

Only type A has subtypes, which are based on external glycoproteins

Question 4

Can viruses be found in the blood?

Answer 4

No, viruses secrete interferons to circulate in the blood but they themselves don’t enter the bloodstream

Question 5

What effect does respiratory syncytial virus (RSV) have?

Answer 5

. Causes cells to fuse together
. Causes LRTI in babies and young children
. Only causes cold symptoms in adults, not pneumonia

Question 6

Compare the severity of upper and lower respiratory tract infections.

Answer 6

. URTIs more common and relatively trivial (common cold rhinovirus)
. LRTIs more serious (influenza virus, RSV)