PBH 101 EXAM 2 UPDATED ACTUAL QUESTIONS AND
CORRECT ANSWERS
Question:
1. Vector
Answer:
living organism that transmits from a reservoir/infected host and susceptible host
Question:
2. Mechanical Vector
Answer:
moves the agent (fly, cockroach)
Question:
3. Biological Vector
Answer:
(Infectious Disease) amplifies the agent
Question:
4. Chemical Vector
Answer:
Lead, Mercury, Arsenic, Ozone
Question:
5. Physical Vector
Answer:
Particulate Matter
Question:
6. Difference between zoonotic and anthroponotic vector-borne disease
Answer:
Zoonotic: transmits from animal to human via vector
Anthroponotic: transmits person to person via vector
Question:
7. Examples of zoonotic and anthroponotic disease
Answer:
Zoonotic: plague: rodent-flea-human Anthroponotic: malaria, dengue fever, yellow fever
Question:
8. Intrinsic vs. extrinsic incubation period
Answer:
Extrinsic: how long until agent amplifies sufficiently in the vector so it can infect humans
Intrinsic: how long until humans express symptoms
, Question:
9. Common disease vectors
Answer:
-Mosquitoes (Aedes, Culex, Anopheles)
-Ticks (Ixodes)
-Fleas
Question:
10. Commonalities of dengue and zika
Answer:
Transmitted by Aedes mosquitoes, Cause similar viral symptoms (fever, rash, general malaise), Occur in
similar tropical and subtropical regions, Can spread quickly in populations.
Question:
11. What vector transmits dengue and zika
Answer:
Aedes aegypti mosquito: breed in water, lifecycle (eggs, larvae, pupae in 5-10 days in water), day biting,
don't travel more than a mile from breeding site, prefer cool shaded places (in house/cabinate/porch), only
females bite, can be transmitted vertically, infected for life (month)
Question:
12. How does climate and weather affect vector-borne diseases
Answer:
Climate (tropical, dry, etc): influences where in the world (range) the disease will occur
Weather (daily or weekly conditions): determines the timing and intensity of outbreaks
Question:
13. Vector control strategies
Answer:
Personal Protection, Structural Barriers, Larval control, Adult control and source reduction
Question:
14. Personal protection
Answer:
long sleeves, clothing impregnated with permethrin, mosquito net
Question:
15. Structural barriers
Answer:
screen on doors/windows
Question:
16. Larval control
Answer:
growth regulators, larvacidal films and oils, microbial insecticides
CORRECT ANSWERS
Question:
1. Vector
Answer:
living organism that transmits from a reservoir/infected host and susceptible host
Question:
2. Mechanical Vector
Answer:
moves the agent (fly, cockroach)
Question:
3. Biological Vector
Answer:
(Infectious Disease) amplifies the agent
Question:
4. Chemical Vector
Answer:
Lead, Mercury, Arsenic, Ozone
Question:
5. Physical Vector
Answer:
Particulate Matter
Question:
6. Difference between zoonotic and anthroponotic vector-borne disease
Answer:
Zoonotic: transmits from animal to human via vector
Anthroponotic: transmits person to person via vector
Question:
7. Examples of zoonotic and anthroponotic disease
Answer:
Zoonotic: plague: rodent-flea-human Anthroponotic: malaria, dengue fever, yellow fever
Question:
8. Intrinsic vs. extrinsic incubation period
Answer:
Extrinsic: how long until agent amplifies sufficiently in the vector so it can infect humans
Intrinsic: how long until humans express symptoms
, Question:
9. Common disease vectors
Answer:
-Mosquitoes (Aedes, Culex, Anopheles)
-Ticks (Ixodes)
-Fleas
Question:
10. Commonalities of dengue and zika
Answer:
Transmitted by Aedes mosquitoes, Cause similar viral symptoms (fever, rash, general malaise), Occur in
similar tropical and subtropical regions, Can spread quickly in populations.
Question:
11. What vector transmits dengue and zika
Answer:
Aedes aegypti mosquito: breed in water, lifecycle (eggs, larvae, pupae in 5-10 days in water), day biting,
don't travel more than a mile from breeding site, prefer cool shaded places (in house/cabinate/porch), only
females bite, can be transmitted vertically, infected for life (month)
Question:
12. How does climate and weather affect vector-borne diseases
Answer:
Climate (tropical, dry, etc): influences where in the world (range) the disease will occur
Weather (daily or weekly conditions): determines the timing and intensity of outbreaks
Question:
13. Vector control strategies
Answer:
Personal Protection, Structural Barriers, Larval control, Adult control and source reduction
Question:
14. Personal protection
Answer:
long sleeves, clothing impregnated with permethrin, mosquito net
Question:
15. Structural barriers
Answer:
screen on doors/windows
Question:
16. Larval control
Answer:
growth regulators, larvacidal films and oils, microbial insecticides
