Alberta Insect Vector Identification and
Disease Prevention (2026
Edition)Comprehensive Canadian Public
Health & Vector Identification Exam
Preparation | High-Difficulty Multiple-Choice
Questions | Verified Answers | Detailed
Rationales in Italics | Alberta Environmental
Health, Pest Management & Disease
Prevention Concepts
Question 1
Which insect is considered the primary vector of West Nile virus
in Alberta?
A. Black fly
B. Horse fly
C. Culex mosquito
D. Deer fly
Answer: C. Culex mosquito
,Rationale: Culex species are the principal vectors responsible for
transmitting West Nile virus between infected birds and humans
throughout Alberta.
Question 2
What characteristic best distinguishes mosquitoes from biting
midges?
A. Broad wings
B. Long chewing mouthparts
C. Long proboscis adapted for piercing and sucking
D. Flattened body
Answer: C. Long proboscis adapted for piercing and sucking
Rationale: Mosquitoes possess an elongated proboscis used to
pierce skin and obtain blood meals, while biting midges have
much shorter mouthparts.
Question 3
Which disease is currently recognized as the most significant
mosquito-borne disease affecting Alberta?
A. Dengue fever
B. Yellow fever
,C. Malaria
D. West Nile virus infection
Answer: D. West Nile virus infection
Rationale: West Nile virus remains the most important endemic
mosquito-borne disease monitored in Alberta.
Question 4
Which host serves as the primary reservoir for West Nile virus?
A. Horses
B. Humans
C. Dogs
D. Wild birds
Answer: D. Wild birds
Rationale: Birds develop sufficient viral levels to infect feeding
mosquitoes, maintaining the natural transmission cycle.
Question 5
Which mosquito life stage is entirely aquatic?
A. Adult
B. Larva
, C. Pupa only
D. Egg only
Answer: B. Larva
Rationale: Mosquito larvae live entirely in water where they
feed and develop before pupation.
Question 6
Which insect is most commonly associated with painful daytime
bites near rivers and streams?
A. Mosquito
B. Stable fly
C. Black fly
D. Crane fly
Answer: C. Black fly
Rationale: Black flies breed in flowing water and aggressively
bite during daylight hours.
Question 7
Which environmental condition most favors mosquito
breeding?
Disease Prevention (2026
Edition)Comprehensive Canadian Public
Health & Vector Identification Exam
Preparation | High-Difficulty Multiple-Choice
Questions | Verified Answers | Detailed
Rationales in Italics | Alberta Environmental
Health, Pest Management & Disease
Prevention Concepts
Question 1
Which insect is considered the primary vector of West Nile virus
in Alberta?
A. Black fly
B. Horse fly
C. Culex mosquito
D. Deer fly
Answer: C. Culex mosquito
,Rationale: Culex species are the principal vectors responsible for
transmitting West Nile virus between infected birds and humans
throughout Alberta.
Question 2
What characteristic best distinguishes mosquitoes from biting
midges?
A. Broad wings
B. Long chewing mouthparts
C. Long proboscis adapted for piercing and sucking
D. Flattened body
Answer: C. Long proboscis adapted for piercing and sucking
Rationale: Mosquitoes possess an elongated proboscis used to
pierce skin and obtain blood meals, while biting midges have
much shorter mouthparts.
Question 3
Which disease is currently recognized as the most significant
mosquito-borne disease affecting Alberta?
A. Dengue fever
B. Yellow fever
,C. Malaria
D. West Nile virus infection
Answer: D. West Nile virus infection
Rationale: West Nile virus remains the most important endemic
mosquito-borne disease monitored in Alberta.
Question 4
Which host serves as the primary reservoir for West Nile virus?
A. Horses
B. Humans
C. Dogs
D. Wild birds
Answer: D. Wild birds
Rationale: Birds develop sufficient viral levels to infect feeding
mosquitoes, maintaining the natural transmission cycle.
Question 5
Which mosquito life stage is entirely aquatic?
A. Adult
B. Larva
, C. Pupa only
D. Egg only
Answer: B. Larva
Rationale: Mosquito larvae live entirely in water where they
feed and develop before pupation.
Question 6
Which insect is most commonly associated with painful daytime
bites near rivers and streams?
A. Mosquito
B. Stable fly
C. Black fly
D. Crane fly
Answer: C. Black fly
Rationale: Black flies breed in flowing water and aggressively
bite during daylight hours.
Question 7
Which environmental condition most favors mosquito
breeding?
