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PARASITOLOGY > Multiple choice (Laventhal) > Flashcards

Multiple choice (Laventhal) Flashcards

1
Q

Infection with Enterobious vermicularis is the best diagnosed by which one of the following?

A

Examination of a cellophane tape preparation for eggs and adult

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2
Q

Human infection with Loa loa is the best diagnosed by which of following ?

A

Examination of blood smears

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3
Q

A child who plays in the dirt contaminated with human and pet feces is susceptible to which of the following set of parasites?

A

S. stercoralis, T. canis, A. lumbricoides, N. americanus

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4
Q

All of the following adult parasites live in the intestinal tract, except:
Ascaris lumbricoides
Dracunculus medinensis
Onchocerca vovulus
Trichella spiralis

A

Onchocerca volvulus

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5
Q

The largest nematodes that is found in the subcutaneously in infected host?

A

Dracunculus medinensis

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6
Q

Each of the following microfilaria has a sheath , except

A

Mansonella ozzardi

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7
Q

Diagnostic method for Ascaris lumbricoides

A

Fecal concentration method

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8
Q

Diagnostic method for S. stercoralis

A

Fecal concentration method

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9
Q

Diagnostic method for Trichinella spiralis

A

Tissue biopsy

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10
Q

Diagnostic method for W. bancrofti

A

Blood film examination

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11
Q

The vector of Brugia malayi

A

Anopheles and mansonia

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12
Q

The vector of Loa loa

A

Chrysops fly

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13
Q

The vector for Onchocerca volvulus

A

Simulium fly

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14
Q

The vector for Wuchereria bancrofti

A

Anopheles and culex

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15
Q

Visceral larva migrants is caused by

A

Toxocara canis

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16
Q

The zoonotic disease known as creeping eruption is caused by :

A

Ancylostoma braziliense

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17
Q

Can cause microcytic anemia , Vitamin b12 deficiency

A

Diphyllobothrium latum

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18
Q

Plerocercoid subcutaneously

A

Sparganosis

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19
Q

Neurological symptoms in the brain

A

Cysticercosis

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20
Q

Autoreinfection is common

A

Hymenolepis nana

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21
Q

Proglottid has 7 to 10 lateral urine branches

A

Taenia solium

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22
Q

Human accidentally ingested infected flea

A

Dipylidium caninum

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23
Q

Cysts found in liver, lungs or other organs

A

Echinococcus granulosus

24
Q

A patient from the Great Lakes ares presents with vague abdominal symptoms and a macrocytic anemia. Which cestoda would be the probable cause?

A

Diphyllobothrium latum

25
Q

A scolex is recovered in the human feces after patient is treated with medication. The scolex bears four cup shaped suckers. This parasite is:

A

Taenia saginata

26
Q

The eggs of which two species are infective to humans if ingested, resulting in the larval stages and pathology in the host tissue?

A

Echinococcus granulosos and Taenia solium

Amor’s note: Hymenolepis nana and Taenia saginata

27
Q

The larval stage of which two species are infective to humans if the parasitized insect intermediate host is ingested?

A

Hymenolepis nana and Dipylidium caninum

28
Q

Packets of tapeworm eggs encapsulated in a single membrane were recovered feces. This parasites is:

A

Dipylidium caninum

29
Q

The causative agent of cysticercosis is :

A

Taenia solium

30
Q

The examination of human feces is no help of the detection of ?

A

Echinococcus granulosus

31
Q

Mature eggs of an adult tapeworm accumulate in the :

A

Gravid proglottid

32
Q

A type of tapeworm larva with a large bladder, producing daughter cysts, brood capsules, and numerous scolices is

A

Hydatid cyst

33
Q

Eggs from which tapeworm, when passed, are immediately infective to humans?

A

Hymenolepis nana

34
Q

In which o nematodes can each organism cause a pneumonia-like syndrome in a person exposed to heavy infection with any of the three parasites?

A

Necator americanus, Ascaris lumbricoides, Strongyloider stercoralis

35
Q

A patient presents with vague abdominal pains and a microcytic hypochromic anemia. A possible causative parasite is:

A

Ancylostoma duodenale

36
Q

An immunosuppressed patient is susceptible to autoreinfection with which of the ff nematodes?

A

Strongyloides stercoralis

37
Q

In the Diphyllobothrium latum life cycle, the infective stage for humans is:

A

Plerocercoid

38
Q

The number of uterine branches in the mature proglottid of Taenia saginata is:

A

More than 14

39
Q

The tapeworm scolex without cup-shaped suckers is:

A

Diphyllobotrium latum

40
Q

Define and cite an example of each of the following:

a. Hexacanth embryo
b. Hermaphroditic
c. Armed scolex
d. Proglottid
e. Hydatid cysts

A

a. embryo with 6 hooklets
b. two sexes in one organism
c. presence of hooklets
d. chain of segments
e. E. granulosus

41
Q

What is the intermediate hosts for each parasite:

Taenia solium

A

Pig and Human

42
Q

What is the intermediate hosts for this parasite:

Hymenolepis nana

A

None

43
Q

What is the intermediate hosts for this parasite:

Hymenolepis diminuta

A

Flea or beetle

44
Q

What is the intermediate hosts for this parasite:

Diphyllobothrium latum

A

Fish and Copepod

45
Q

What is the intermediate hosts for this parasite:

Echinococcus granulosus

A

Human and none

46
Q

Chronologic sequence of the life cycle of an intestinal nematode

A

Egg –> Miracidium –> Sporocyst –> Redia –> Cercaria –> Metacercaria –> Adult

47
Q

Humans can be infected with the larval stage of all except one of the following parasites. Which of these Digenea cannot develop as a viable larva in the tissues of humans?

a. Hydatid tapeworm
b. Bird schistosomes
c. Manson’s blood fluke
d. Sheep liver fluke

A

b. Bird schistosomes

48
Q

Which Platyhelminthes infects humans by skin penetration and has an association with bladder cancer?

A

Schistosoma haematobium

49
Q

Eggs of all of the ff flukes are undeveloped when passed in feces except:

a. Fasciola hepatica
b. Paragonimus westermani
c. Schistosoma japonicum
d. Clonorchis sinensis

A

A. Fasciola hepatica

50
Q

Fish carrying metacercariae may transmit:

A

Clonorchis sinensis

51
Q

Paragonimus westermani infection is acquired by:

A

Eating infected crustacea

52
Q

Schistosoma cercariae enter the human body:

A

By skin penetration or in contaminated drinking water

53
Q

The Digenea infection for which bloody urine is often a symptom is:

A

Schistosoma haematobium

54
Q

The fluke most commonly found in the United States is:

A

Fasciola hepatica

55
Q

The preffered specimen for the diagnosis of paragonimiasis is:

A

Sputum

56
Q

The three species of human blood flukes have as intermediate host:

A

An aquatic snail

57
Q

The fluke acquired by eating contaminated vegetation is:

A

Fasciolopsis buski

PARASITOLOGY (4 decks)

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