Virology: Host-Pathogen Interactions - L7-8

Question 1

Mosquito bites can transmit some viruses directly to the blood. This is a case of Active Viremia.

True or False?

Answer 1

False

Note: It should be passive viremia

Question 2

Viruses can enter the CNS from blood by _______

A. Monocyte trafficking
B. Breaking the cementing at endothelial junctions
C. Increase permeability of endothelium
D. All of the above

Answer 2

D. All of the above

Question 3

A family of viruses may prefer a particular organ for effective replication. The term used to describe same is _______

A. Affinity
B. Pathogenicity
C. Tropism
D. Virulence

Answer 3

C. Tropism

Question 4

Which one of the following is NOT usually a feature of persistent viral infection?

A. Virus may remain dormant in host cell
B. Reactivation (clinical disease) occurs during stress
C. Intermittent shedding of virus for long periods
D. Rapid clearance from host immune response

Answer 4

D. Rapid clearance from host immune response

Note: If the virus was rapidly cleared it wouldn’t be considered persistent