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Flashcards in Vector Control Deck (35):
1

Which vector causes Chagas disease?
A. Glossina
B. Triatomine tick
C. Phlebotomus sandflies
D. Ochlerotatus mosquito

B

A- trypanosomiasis
C -leishmania

2

Which vector causes lymphatic filariasis?
A. Glossina
B. Triatomine tick
C. Phlebotomus sandflies
D. Ochlerotatus mosquito

D

3

How can population migration increase vector-borne disease?

unplanned urbanization --> open sewers and water storage containers
PLUS↑ population density --> humans are preferred

4

Which is false?
A. Aedes aegypti biting patterns are also being affected and modified by changing environments and climate
B.↑ diseases associated with mosquitoes due to
cooler climates and ↑ rainfall as a result of global
climate change
C. BOTA

B
Dapat warmer climate!!

5

Enumerate 3 factors that may affect vector control

1. Advanced technology
2. Modern pesticides – can cause side effects
3. Man’s ability to modify environmental conditions

6

Which vector has larvae parallel to water surface?
A. Anopheles mosquito
B. Aedes mosquito
C. Culex mosquito
D. Ochlerotatus mosquito

A

7

Which vector has larvae 45 degrees to water surface?
A. Anopheles mosquito
B. Aedes mosquito
C. Culex mosquito
D. Ochlerotatus mosquito

C

8

Which vector "loves" permanent polluted water?
A. Anopheles mosquito
B. Aedes mosquito
C. Culex mosquito
D. Ochlerotatus mosquito

C

9

Differentiate endemic from outbreak

Endemic – continually present at a steady level
Outbreak – slight increase over endemic level

10

Which type is most common @ PHL? Also causes cerebral malaria.
A. P.vivax
B. P.falciparum
C. P.malariae
D. P.ovale

B

11

Yellow fever is affected by jungle urban cycle of Aedes aegypti. Explain please!

For the person: trips to the forest: trekking (bitten by the mosquito -> goes back to the city (gets sick)

Shifts between forest/jungle habitat to urban/indoor habitat

12

Which is false?
A. Yellow fever may be controlled via vaccine.
B. Humans are natural hosts of encephalitis virus.
C. Flies are both mechanical & biological vectors.
D.Ectoparasite control should be done prior to trapping.

B
birds dapat

13

Enumerate 3 factors part of the early control program for vector control?

Screening of houses
Use of mosquito nets (pesticide-impregnated)
Drainage or filling of swamps and other water sources

14

Which is/are used on adult mosquitoes?
A. aspirator
B. light traps
C. syringe and vial
D. dipper

A & B

15

Which is/are used on larvae mosquitoes? How?
A. aspirator
B. light traps
C. syringe and vial
D. dipper

C & D
D: Placing the lip of the dipper under the water surface → pull forward; Larvae are counted and recorded

16

Why are fumigants problematic?

they do not kill; adults are just displaced, no effect to larvae, short term effect

17

Factors affecting level of pesticides in food chains- enumerate the 4

1. Amount of pesticide ingested
2. Time period over which pesticides are ingested
3. Pesticide-storage capability of animal
4. Rate of detoxification and excretion

18

What incident revealed the revealed adverse side effects of DDT to humans and the environment in general?

Rachel Carson's Silent Spring

19

How does biological control work for mosquitoes?

Small fishes – eat larvae
 Birds, bats and dragonflies – eat adult mosquitoes

20

not a disadvantage of mosquito biological control for humans
A. Parasitic infestations
B. Exposure to harmful toxins
C. Allergic reactions
D. Increased risk of NCDs

D

21

What won't happen to beneficial organisms bc of mosquito bio control?
A. Infestation
B. Predation
C. Multiplication
D. Displacement

C

22

Enumerate DOH 4S strategy against dengue

Search and destroy - breeding places
Self protection measures
Seek early consultation
Say “no” to indiscriminate fogging

23

Differentiate Breteau index (BI) from Container Index (CI)–

Breteau index (BI) – number of positive containers per 100 houses inspected
Container index (CI) – percentage of water-holding containers infested with larvae or pupae.

24

Enumerate components of the DOST'S Ovi Trap!! + purpose of each

black can/cup: female Aedes LOVE black
OL pellets + water: to KILL
lawanit paddle: attract Aedes to lay eggs there. TRAP!!

25

Which is false?
A. household garbage - most important source of flies
B. flies are mechanical vectors of anthrax
C. a gravid female fly can lay 100-150 eggs
D. Cockroaches can be prevented via regular handwashing.

B - biological dapat

26

Cockroaches family name

Blattidae

27

False about Cimex lecturalis
A.Hide in crevices and cracks, feed at night
B.Nuisance and may cause hypersensitivity reactions
C.Control through insecticides and regular handwashing
D.No larva stage

C
bed bugs ito kaya little effect ang handwashing

28

lice are vectors for all except
A. pediculosis
B. epidemic typhus
C. relapsing fever
D. plague

D - kasi sa Xenopsylla cheopis ito

29

Rodents are not reservoirs for/
A. leptospirosis
B. salmonellosis
C. murine typhus
D. NOTA

C - they are host for the tick & the flea (Xenopsylla cheopis)

30

Which is not true about rats?
A.Keen sense of touch
B.color blind
C.Taste sense well developed

C

A- through vibrissae and tactile hairs

31

Enumerate the 3 things revealed @ rodent surveillance

species
population density
frequency

32

Which instrument is used to Detects rat urine stains

phosphorescent UV light bulb

33

Name 2 rodenticides + effect @ rat

Anticoagulants - warfarin (bleed to death)
Red squill –natural emetic (causes vomiting)

34

vector of Guinea worm
A. Copepod
B. Triatomine tick
C. Phlebotomus sandflies
D. Ochlerotatus mosquito

A

35

lack of control of this vector may increase cases of river blindness
A. Glossina
B. Triatomine tick
C. Black fly
D. Ochlerotatus mosquito

C