Samplex 2014 Set B (Parasitology)

Question 1

The primary vector of malaria in the Philippines is

a. Anopheles maculatus
b. Anopheles balabecensis
c. Anopheles mangyanus
d. Anopheles flavirostris

Answer 1

D

Question 2

Which of the following is not transmitted by Pediculus humanus humanus?

a. trench fever
b. relapsing fever
c. murine typhus
d. epidemic typhus

Answer 2

C

Question 3

Mechanical transmission of disease agents by non-biting flies is facilitated by the following except:

a. presence of hairs on the body of the fly
b. the filthy feeding habits of flies
c. the presence of both sexes
d. provision of the sponging lapping mouthparts

Answer 3

B

Question 4

What is the beetle intermediate host of Raillietina garrisoni?

a. Sitophilus
b. Acanthoscelides
c. Tribolium
d. Dermestes

Answer 4

C

Question 5

Vector of Trypanosoma cruzi

a. Rhodnius prolixus
b. Panstrongylus megistus
c. Triatoma infestans
d. All of the above

Answer 5

D

Question 6

Refers to the infection of the body by flies:

a. dermatosis
b. canthanasis
c. myasis
d. acariasis

Answer 6

C

Question 7

Among insects, sex differentiation can be determined by their:

a. proboscis
b. antennae
c. wings
d. color

Answer 7

B

Question 8

Which of the following is not an ectoparasite:

a. body louse adult
b. crab louse nits
c. head louse nymph
d. itch mites

Answer 8

B

Question 9

Which of these is not a biological vector?

a. mosquito larva
b. adult fly
c. flea larva
d. Kissing bug egg

Answer 9

B

Question 10

The lesions created by this insect are arranged in a zigzag pattern

a. Pulex
b. Culex
c. Cimex
d. none of the above

Answer 10

A

Question 11

The following features of the louse are adaptation for parasitism except:

a. small wingless body
b. piercing, sucking mouthpart
c. slender legs with claw
d. short antennae

Answer 11

D

Question 12

Human flea:

a. Pulex irritans
b. Ctenocephalides canis
c. Xenopsylla cheopis
d. Tunga penetrans

Answer 12

A

Question 13

Which of the following causes specific myiasis?

a. housefly
b. botfly
c. blowfly
d. latrine fly

Answer 13

B

Question 14

The following species transmit hepatitis virus except:

a. cimex lectularius
b. cimex hemipterus
c. leptocimex boueti
d. rhodnius prolixus

Answer 14

D

Question 15

The following diseases can be transmitted by the flea except:

a) hymenolepiasis
b) dipylidiasis
c) plague
d) scrub typhus

Answer 15

D

Question 16

Bancroftian filariasis in the Philippines is transmitted by the following mosquitoes, except:

a. Mansonia
b. Aedes
c. Anopheles
d. None of the above

Answer 16

A

Question 17

Man and animals attract mosquitoes by:

a. breath
b. sweat
c. warmth
d. all of the above

Answer 17

D

Question 18

Arthropod that burrows itself under the upper layers of skin.

a. Sarcoptes
b. Pediculus
c. Phthrirus
d. Cimex

Answer 18

A

Sarcoptes causes scabies

Question 19

This species is also known as the house dust mite.

a. Dermatophagoides
b. Acarus
c. Lepidoglyphus
d. Tyrophagus

Answer 19

A

Question 20

This is the biological vector of Japanese encephalitis.

a. Aedes albopictus
b. Mansonia bonneae
c. Anopheles poecillius
d. Culex tritaeniorhynchus

Answer 20

D

Question 21

Which of the following statements is true?

a. In a symbiotic relationship, both organisms must benefit.
b. The human pinworm has an indirect life cycle.
c. In a paratenic host, the parasite is alive but unable to undergo further development.
d. Facultative parasites are unable to survive outside the host’s body.

Answer 21

C

Question 22

Erythematous rash in a man’s foot caused by cutaneous larva migrans from a dog flea. Man is what kind of host?

a. accidental
b. indirect
c. direct
d. reservoir

Answer 22

A

Question 23

Which of the following helminths requires an intermediate host?

a. ascaris
b. blood fluke
c. hookworm
d. whipworm

Answer 23

B

Question 24

A man walking barefoot experienced an itching in his foot’s sole. The parasite that caused the itching was a dog hookworm. The man served as what kind of host?

a. Accidental host
b. Intermediate host
c. definite host
d. all of the above

Answer 24

A

Question 25

which of the following is a characteristic of trichuris infection?

a. most frequently asymptomatic
b. characterized by lung to GI migration
c. small intestine intussusceptions
d. characterized by autoinfection

Answer 25

A

Question 26

What is the symptom of Ascaris infection that should not be included in the following:

a. bowel obstruction
b. rectal prolapsed
c. enhanced migration
c. transient respiratory syndrome

Answer 26

B

Rectal prolapse is a symptom of trichuris trichiura infection. Symptoms of Ascaris includes abdominal pain, intestinal obstruction and transient respiratory syndrome

Question 27

In hookworm infection, ground itch is caused by?

a. penetration of skin by filariform larva
b. rhabditiform migration in subcutaneous tissue
c. larval migration from alveoli to trachea
d. allergic reaction from egg antigen

Answer 27

A

Question 28

Best way of diagnosing Strongyloides stercolitica

a. eggs in FES (fecal smear)
b. rhabditiform larva in FECT (formalin-ether concentration technique)
c. filariform larvae in Kato-thick smear
d. eggs in duodenal aspirate

Answer 28

B

Question 29

People heavily infected with hookworm for several months will manifest

a. pallor
b. rash on the feet
c. vomiting
d. wheezing

Answer 29

A

hookworm –> anemia -> pallor

Question 30

All of the following are good control measures against STH except

a. wearing of sleepers and shoes
b. periodic mass treatment with anti-helminthic
c. chemical eradication of filariform larva in the soil
d. avoiding using human feces as fertilizer

Answer 30

C

the use of chemical might have a deleterious effect in the health of humans living near the area where the chemical was used.