Question: 1- please define the following words: Persistent transmission Semi-persistent transmission Non-pe…

1- please define the following words: Persistent transmission
Semi-persistent transmission Non-persistent transmission Retention
(insect transmission systems) Latent period(insect transmission
systems)

2- Which one is the most prevalent group of plant virus
vectors:

a- thrips

b-homopterans

c- dipterans

d- coleopterans

3- what is the most important type of transmission for
arboviruses:

a- egg

b- feces

c-saliva

d- external vector surface

4- The —- is the only form of mosquito that takes a blood
meal:

a- immature instar

b- female

c- vector

d- male

5- the most important arbovirus is

a- tick

b- whitefly

c- mosquito

d- yellow fever

6- what influences the most virus evolution:

a- host

b- vector

c- climate

d- capsid shape