QUIZ 1 Culicine Mosquitoes: Biology, Taxonomy, and Medical Importance

What role do bridge vectors play in West Nile virus transmission?

Transfer virus from birds to mammals

Why do forest-dwelling yellow fever vectors occasionally infect humans?

Mosquitoes descend during ecological disturbance

Why does indoor residual spraying (IRS) generally fail against most culicine mosquitoes?

Culicines rest mainly outdoors

Which feature increases the persistence of yellow fever virus during dry seasons?

Transovarial transmission

Which ecological condition MOST favors urban dengue outbreaks?

High density of water-holding containers

Why is egg desiccation resistance in Aedes mosquitoes a major obstacle to larval control programs?

Eggs survive dry periods and hatch asynchronously

Which feature MOST clearly distinguishes Mansonia larvae from those of Culex and Aedes?

Siphon adapted for piercing plants

Why is Aedes albopictus particularly successful as an invasive species?

Eggs survive transport in dry containers

Which control measure would MOST reduce JE transmission in rural Asia?

 Controlling rice-field mosquitoes

Why are pigs considered amplifying hosts in Japanese encephalitis?

They develop high viraemia

Which control strategy BEST exploits the breeding behavior of Aedes eggs?

Continuous larviciding of water bodies

Why are humans considered dead-end hosts for West Nile virus?

Viraemia is insufficient to infect mosquitoes

Which mosquito species is MOST critical in the urban cycle of yellow fever?

Aedes aegypti

Which mosquito group is MOST associated with Japanese encephalitis transmission?

Culex rice-field breeders

A mosquito population increases rapidly in a city with poor sanitation and clogged drains. Which vector is MOST likely responsible?

Culex quinquefasciatus

A mosquito population increases rapidly in a city with poor sanitation and clogged drains. Which vector is MOST likely responsible?

Culex quinquefasciatus

Why is herbicide use sometimes preferred over larvicides in controlling Mansonia mosquitoes?

 Larvae obtain oxygen directly from plants

Why is source reduction more effective for Aedes aegypti than for Culex mosquitoes?

Aedes breed mainly in discrete, man-made containers

Why is yellow fever considered a zoonosis?

Non-human primates maintain the virus

Which biological trait explains why Mansonia larvae are often missed during surveys?

Permanent attachment to aquatic plants