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PH 136 > Vector Control > Flashcards

Vector Control Flashcards

1
Q 
Which vector causes Chagas disease?
A. Glossina
B. Triatomine tick
C. Phlebotomus sandflies
D. Ochlerotatus mosquito
A

B

A- trypanosomiasis
C -leishmania

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2
Q 
Which vector causes lymphatic filariasis?
A. Glossina
B. Triatomine tick
C. Phlebotomus sandflies
D. Ochlerotatus mosquito
A

D

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3
Q

How can population migration increase vector-borne disease?

A

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

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4
Q

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

A

B

Dapat warmer climate!!

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5
Q

Enumerate 3 factors that may affect vector control

A
  1. Advanced technology
  2. Modern pesticides – can cause side effects
  3. Man’s ability to modify environmental conditions
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6
Q 
Which vector has larvae parallel to water surface?
A. Anopheles mosquito
B. Aedes mosquito
C. Culex mosquito
D. Ochlerotatus mosquito
A

A

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7
Q 
Which vector has larvae 45 degrees to water surface?
A. Anopheles mosquito
B. Aedes mosquito
C. Culex mosquito
D. Ochlerotatus mosquito
A

C

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8
Q 
Which vector "loves" permanent polluted water?
A. Anopheles mosquito
B. Aedes mosquito
C. Culex mosquito
D. Ochlerotatus mosquito
A

C

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9
Q

Differentiate endemic from outbreak

A

Endemic – continually present at a steady level

Outbreak – slight increase over endemic level

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10
Q 
Which type is most common @ PHL? Also causes cerebral malaria.
A. P.vivax
B. P.falciparum
C. P.malariae
D. P.ovale
A

B

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11
Q

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

A

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

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12
Q

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.

A

B

birds dapat

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13
Q

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

A

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

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14
Q 
Which is/are used on adult mosquitoes?
A. aspirator
B. light traps
C. syringe and vial
D. dipper
A

A & B

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15
Q 
Which is/are used on larvae mosquitoes? How?
A. aspirator
B. light traps
C. syringe and vial
D. dipper
A

C & D

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

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16
Q

Why are fumigants problematic?

A

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

17
Q

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

A
  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
Q

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

A

Rachel Carson’s Silent Spring

19
Q

How does biological control work for mosquitoes?

A

Small fishes – eat larvae

 Birds, bats and dragonflies – eat adult mosquitoes

20
Q 
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
A

D

21
Q 
What won't happen to beneficial organisms bc of mosquito bio control?
A. Infestation
B. Predation
C. Multiplication
D. Displacement
A

C

22
Q

Enumerate DOH 4S strategy against dengue

A

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

23
Q

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

A 
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
Q

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

A

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

25
Q

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.

A

B - biological dapat

26
Q

Cockroaches family name

A

Blattidae

27
Q

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

A

C

bed bugs ito kaya little effect ang handwashing

28
Q 
lice are vectors for all except
A. pediculosis
B. epidemic typhus
C. relapsing fever
D. plague
A

D - kasi sa Xenopsylla cheopis ito

29
Q 
Rodents are not reservoirs for/
A. leptospirosis
B. salmonellosis
C. murine typhus
D. NOTA
A

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

30
Q

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

A

C

A- through vibrissae and tactile hairs

31
Q

Enumerate the 3 things revealed @ rodent surveillance

A

species
population density
frequency

32
Q

Which instrument is used to Detects rat urine stains

A

phosphorescent UV light bulb

33
Q

Name 2 rodenticides + effect @ rat

A

Anticoagulants - warfarin (bleed to death)

Red squill –natural emetic (causes vomiting)

34
Q 
vector of Guinea worm
A. Copepod
B. Triatomine tick
C. Phlebotomus sandflies
D. Ochlerotatus mosquito
A

A

35
Q 
lack of control of this vector may increase cases of river blindness
A. Glossina
B. Triatomine tick
C. Black fly
D. Ochlerotatus mosquito
A

C

PH 136 (18 decks)

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