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Microbiology and Parasitology > Fundamentals of parasitology and soil-transmitted helminths > Flashcards

Fundamentals of parasitology and soil-transmitted helminths Flashcards

2015-2018

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Biology 101 flashcards
1
Q

Helminths with intermediate host

A. Ascaris lumbricoides
B. Necator americanus
C. Schistosoma japonicum
D. Trichuris trichuria

A

C

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2
Q

25 year old man dude consults for foot rash after going to mega nice beach. You diagnose it as cutaneous larva migrans from dog hookworm. Man dude is what kind of host

A. Accidental
B. Definitive
C. Paretenic
D. Reservoir

A

A

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3
Q

No pulmonary migration in this helminth’s life cycle

A. Ascaris
B. Ancylostoma
C. Trichuris
D. Strongyloides

A

C

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4
Q

Characteristic of soil-transmitted helminthes

A. Pneumonitis during worm migration through the lungs is seen in whipworm infections

B. Without repeated exposure to filariform larve, the number of adult Strongyloides worms in a human host cannot increase

C. The infective stage of the hookworm is the filariform larvae

D. Strongyloides filariform larve are free-living in the soil

A

C

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5
Q

Binds to helminth beta-tubulin, preventing uptake of glucose

A. Albendazole
B. Ivermectin
C. Pyrantel pamoate
D. Praziquantel

A

A

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6
Q

Characteristic of an adult female Trichuris

A. Blunted posterior end
B. Paired posterior spicules
C. Copulatory bursa
D. Thick anterior end

A

A

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7
Q

Stool concentration techniques are better than the direct fecal smear for diagnosing soil-transmitted helminth infections because these

A. keep the eggs viable
B. are more sensitive
C. preserve the morphology of the eggs
D. require less steps to perform in the lab

A

B

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8
Q

In the freshly voided stool of a person with Strongyloides infection, you will find

A. Unfertilized egg
B. Fertilized egg
C. Embryonated egg
D. Rhabditiform larvae

A

D

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9
Q

Describes a Trichuris egg

A. Thin shelled
B. Unembryonated when passed in stool
C. Has a thickened abopercular end
D. Has mammilations

A

C

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10
Q

Describes hookworms or hookworm infection

A. Rhabditiform larvae comprises the infectious phase
B. A stage of development in the lungs is needed
C. Necator has cutting plates
D. Malnutrition and anemia are rare consequences of hookworm infections in children

A

B

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11
Q

Using stool concentration techniques is helpful in detecting ova of the following helminthes except:

A. Ascaris lumbricoides
B. Trichuris trichiuria
C. Strongyloides stercoralis
D. Hookworms

A

C

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12
Q

Medications for soil-transmitted helminthes is given every __ month/s in the Philippine Integrated Helminth Control Program

A. 1
B. 3
C. 6
D. 9

A

C

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13
Q

A person with Strongyloides hyperinfection will have

A. A competent, hyperactive immune system
B. Filariform larvae penetrating the perianal skin
C. embryonated eggs in the stool
D. severe symptoms limited to the GIT

A

A

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14
Q

Does not migrate through the human lung during development

a. Ascaris
b. Hookworm
c. Trichuris
d. Strongyloides

A

C

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15
Q

Adult worm has thin anterior, thick posterior end

a. Ascaris
b. Hookworm
c. Trichuris trichiura
d. Strongyloides

A

C

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16
Q

Associated with intestinal obstruction and erratic worm migration

a. Ascaris lumbricoides
b. Hookworm
c. Trichuris trichiura
d. Strongyloides

A

A

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17
Q

Which of the following parasites has a snail intermediate host?

a. Taenia solium
b. Echinostoma ilocanum
c. Capillaria philippinensis
d. Trichuris trichura
e. NOTA

A

E

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18
Q

Sundathelpusa philippina is the crustacean intermediate host of?

a. Paragonimus westermanii
b. Echinostoma ilocanum
c. Capillaria philippinensis
d. Fasciola hepatica
e. NOTA

A

A

19
Q

Which of the following parasites is notorious in causing cholangiocarcinoma?

a. Opisthorchis viverini
b. Clonorchis sinensis
c. Fasciola hepatica
d. Fasciola gigantica
e. NOTA

A

A

20
Q

Which of the following causes neurocysticercosis?

a. Taenia solium
b. Taenia saginata
c. Capillaria philippinensis
d. Trichuris trichura
e. NOTA

A

A

21
Q

Which of the following does not require a heart-lung stage?

a. Ascaris lumbricoides
b. Hookworm
c. Trichuris trichura
d. Stronglyoides stercoralis
e. NOTA

A

C

22
Q

Which of the following causes iron deficiency anemia?

a. Ascaris lumbricoides
b. Hookworm
c. Trichuris trichura
d. Stronglyoides stercoralis
e. NOTA

A

B

23
Q

Which of the following commonly causes rectal prolapse?

a. Ascaris lumbricoides
b. Hookworm
c. Trichuris trichura
d. Stronglyoides stercoralis
e. NOTA

A

C

24
Q

Which of the following has a free-living stage?

a. Ascaris lumbricoides
b. Hookworm
c. Trichuris trichura
d. Stronglyoides stercoralis
e. NOTA

A

D

25
Q

Which of the following could re-infect a host due to autoinoculation?

a. Ascaris lumbricoides
b. Hookworm
c. Trichuris trichura
d. Stronglyoides stercoralis
e. NOTA

A

D

26
Q

Which of the following is an emerging infection among AIDS patients?

a. Ascaris lumbricoides
b. Hookworm
c. Trichuris trichura
d. Stronglyoides stercoralis
e. NOTA

A

D

27
Q

In schistosomiasis, The pathological changes in the liver is due to what stage of the parasite?

a. Egg
b. Cyst
c. Larva
d. Adult

A

A

28
Q

Which of the following has cutting plates?

a. Ancylostoma duodenale
b. Necator americanum
c. Ancylostoma caninum
d. NOTA

A

B

29
Q

Which of the following is most prone to hookworm infection?

a. Children who frequently wade in streams
b. Children who frequently play barefoot in the garden
c. Farmers who frequently till the land barefoot
d. Fishermen who eat raw fish

A

C

30
Q

Oncomelania snail will thrive in the following except

a. Lagoon
b. Cove
c. Stream
d. Ricefield
e. NOTA

A

D

31
Q

Organism that transfers the parasite from a source

a. carrier
b. ectoparasite
c. reservoir
d. vector

A

D

32
Q

Most common roundworm

a. Ascaris
b. Ancyclostoma
c. Necator
d. Trichuris

A

A

33
Q

Where is the final habitat of adult Trichuris?

a. Cecum
b. Stomach
c. Rectum
d. Perianal skin

A

C

34
Q

Diagnostic phase of hookworms

a. Adult worm
b. Filariform larva
c. Rhabditiform larva
d. Ova

A

D

35
Q

Effective STH management

a. Control of Strongyloides spread through awareness programs on properly washing utensils and avoiding
sharing of towels

b. Most of Ascaris infections are asymptomatic thus, there is no need for treatment
c. Mass treatment of helminth infections by the DOH
d. Educating people on the dangers of open defecation

A

C

36
Q

A kind of host where the parasite attains its sexual maturity

A. Accidental
B. Definitive
C. Intermediate
D. Paratenic

A

B

37
Q

The diagnostic stage for Ascaris is:

A. Adult worm
B. Egg
C. Larva
D. A and B

A

D

38
Q

True of Ascaris

A. Most people with Ascaris are asymptomatic
B. Ascaris worm has both male and female reproductive organs
C. Obstruction of the GI tract is usually due to a minor infection
D. Unfertilized egg in the soil usually takes a longer time to become in the infective stage than fertilized egg

A

A

39
Q

Heavy Trichuris infestation usually presents with

A. Colonic perforation
B. Intestinal Obstruction
C. Rectal prolapse
D. Anemia

A

C

40
Q

Which is true of hookworm infection?

A. Rhabditiform larvae is infective
B. There is a stage in the lungs that is needed
C. Ancylostoma has a mouth with cutting plates
D. Malnutrition and anemia are rare

A

B

41
Q

Diagnostic phase of hookworms

A. Adult worm
B. Filariform larva
C. Rhabditiform larva
D. Ova

A

D

42
Q

Choose the statement that is TRUE about Strongyloides:

A. The number of Strongyloides worms may increase in a human host even without repeated exposure to the infective stage in the soil.

B. The final habitat of adult Strongyloides worms is the large intestine.

C. Disseminated Strongyloides infection is equally common in immunocompromised and immunocompetent hosts.

D. The stage excreted in human stool is the embryonated or fertilized egg.

A

A

43
Q

This drug kills worms by binding to free beta-tubulin and inhibiting glucose uptake. Which is it?

A. ivermectin
B. mebendazole
C. praziquantel
D. pyrantel pamoate

A

B

Microbiology and Parasitology (7 decks)

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