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REHS- Vectors Exam Questions and Complete Solutions Graded A+
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REHS- Vectors Exam Questions and Complete Solutions Graded A+
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REHS- VectorsExam Questions
and Complete
Solutions Graded
A+
Denning [Date] [Course title]
, Which sex of the mosquito bites? - Answer: -Females.
2.Why does a female mosquito have to take a blood meal? - Answer: -Needed in order to mature her
eggs.
3.Why are mosquitos known as a vector? - Answer: -Because they release infectious agents when taking
a blood meal. Inoculation.
4.Describe the diseases which a mosquito can spread. - Answer: -Four common diseases of the
mosquito are Plasmodium Vivax (Malaria), Yellow Fever, Encephalitis, Filariasis.
5.Describe the lifecycle of a mosquito. - Answer: -11 to 16 day cycle. Adult female mosquitoes lays eggs
in water, eggs hatch in 2-3 days into larvae, larvae feeds on organic matter, larvae turn into pupa (4-10
days later). Pupae then turns into an adult mosquito in 2 days.
6.What are some larval characteristics of mosquitos? - Answer: -Depending on type of species.
Anopheles larvae (malaria vector) are flat looking and wiggle horizontally up and down. -culex larvae
(western st. louis encephalitis) has a long breathing tube. Tube can be seen out of the water. -The Aedes
larvae (yellow fever) has a short breathing tube. It moves at different angles.
7.Describe how mosquito surveys are performed. - Answer: -check for flow characteristics, stagnancy,
and pollution levels in open bodies of water. Mosquito dippers used to capture larvae and study the
adult mosquito.
8.what are Tossits and how are they used? - Answer: -A petroleum based oil pesticide used to **** up
larvae. Considered a hazardous material in California! Liquid detergent is now used.
9.Name 2 common natural enemies of the mosquito. - Answer: -Gambusia Affinis: Minnow freshwater
fish is referred to as the mosquito fish. -The DragonFly: kills larvae and adult mosquitoes.
10.Describe some mosquito control methods. - Answer: -Pesticides (used as a last resort). -When larvae
control has failed these methods can be used: -Fogging (spray insecticides) misting technique into the
air. -Screening, protective clothing; physical barriers. -Repellents: diethyltoluamide (deet) very popular
active ingredient. Vit. B12 or garlic or garlic oil.
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