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Parasit -Internship 2 > Protozoology > Flashcards

Protozoology Flashcards

1
Q

Nucleus: One
Peripheral chromatin: fine, uniform, beaded appearance
Karysome: small, central, “bull’s eye”

A

Trophozoites of Entamoeba histolytica/E. dispar

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2
Q

Nucleus: One
Peripheral chromatin: fine, uniform, beaded appearance
Karyosome: small, eccentric

A

Trophozoites of Entamoeba hartmanni

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3
Q

Nucleus: One
Peripheral chromatin: dark solid ring
Karyosome: large, eccentric

A

Trophozoites of Entamoeba coli

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4
Q

Nucleus: One
Peripheral chromatin: none
Karyosome: large, irregular, blot like, central

A

Trophozoites of Endolimax nana

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5
Q

Smallest intestinal protozoan

A

Trophozoites of Endolimax nana

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6
Q

Nucleus: One; “basket-shaped”, “basket of flowers”
Peripheral chromatin: none
Karyosome: large, central, surrounded by reflactile achromatic granules

A

Iodamoeba butschlii trophozoites

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7
Q

Cytoplasm: Fine, granular, ground glass appearance (“clean looking”)
Inclusions: RBCs (E. histolytica)

A

Entamoeba histolytica/E. dispar trophozoites

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8
Q

Cytoplasm: Fine granular

A

Entamoeba hartmanni trophozoites

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9
Q

Small race E. histolytica

A

Entamoeba hartmanni trophozoites

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10
Q

Cytoplasm: vacoulated “dirty looking”

A

Entamoeba coli trophozoites

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11
Q

Cytoplasm: Fine granular, vacuolated
Inclusions: epithelial cells, WBCs

A

Entamoeba gingivalis trophozoites

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12
Q

Cytoplasm: Granular, vacuolated

A

Endolimax nana trophozoites

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13
Q

Cytoplasm: Coarsely, granular, heavily vacuolated

A

Iodamoeba butschlii trophozoites

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14
Q

Motility: Progressive, directional (explosive)
Hyaline fingerlike or blade pseudopod

A

Entamoeba histolytica/E. dispar trophozoites

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15
Q

Motility: Non-progressive

A

Entamoeba hartmanni trophozoites

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16
Q

Motility: Non-progressive (sluggish)
Blunt, granularh pseudopod

A

Entamoeba coli trophozoites

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17
Q

Motility: Moderately active
Varied pseudopodia

A

Entamoeba gingivalis trophozoites

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18
Q

Motility: Sluggish, non-progressive
Hyaline, blunt or fingerlike pseudopod

A

Iodamoeba buschlii trophozoites

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19
Q

Nucleus: 1-4
PC: fine, uniform
K: small, central

A

Cyst of E. histolvtica/E. dispar

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20
Q

Cytoplasm: CB: elongated bars
with blunt rounded
ends (cigar-
shaped, sausage-
shaped, rod-like)

A

Cyst of E. histolvtica/E. dispar

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21
Q

Shape: Spherical

A

Cyst of E. histolytica/ E. dispar

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22
Q

Nucleus : 1-4

A

Cyst of E. hartmanni

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23
Q

CB: elongated bars with blunt
Spherical, rounded ends (bar-like, rice grain)

A

Cyst of E. hartmanni

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24
Q

Shape: Spherical

A

Cyst of E. hartmanni (the same with E. histolytica and E. dispar)

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25
Q

Nucleus: 1-8
CB: with pointed
PC: coarse granular, irregular ends (splinter-like.
K: large, eccentrics

A

Cyst of E. coli

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26
Q

CB: with pointed broomstick, jagged ends

A

Cyst of E. coli

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27
Q

Shape: Spherical, oval, triangular, other shapes

A

Cyst of E. coli

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28
Q

***No cyst stage

A

E. gingivalis

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29
Q

1-4 (cross-eyed cyst, “button hole”
PC: none (comma, coccoid, short curved
K: large, blot-like, central

A

Cyst of E. nana

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30
Q

CB: none
granules or small oval masses
PC: none
(comma, coccoid, short curvedrods)

A

E. nana

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31
Q

Shape: Spherical, oval, ellipsoidal

A

Cyst of E. nana

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32
Q

Nucleus: 1PC: none
K: large, eccentric, with refractile achromatic granules (periendosome)

A

I. butschlii Cyst

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33
Q

Cytoplasm:
CB: none
Glycogen:
compact, well-defined (dark brown in lodine prep)

A

I. butschlii Cyst

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34
Q

Shape: Oval, ellipsoidal, triangular, other shapes

A

I. butschlii Cyst

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35
Q

“swine amoeba”

A

E. polecki

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36
Q

Cyst is UNNUCLEATED

A

E. polecki

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37
Q

Found in pigs and monkey

A

E. polecki

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38
Q

Cyst stage: “Halo” effect: retraction of cytoplasm from cyst wall

A

Giardia lamblia

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39
Q
  • “Falling leaf,” lip-flop” motility
  • 4 pairs of flagella
  • Sucking disk
  • 2 nuclei: “old man with eyeglasses,” “monkey face”
A

Giardia lamblia

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40
Q

Disease or Diagnosis:
- Gay bowel syndrome
- Leningrad’s curse (traveler’s diarrhea)
- Backpacker’s diarrhea
- Beaver fever
- ST: Enterotest (String test)

A

Giardia lamblia

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41
Q

Cyst stage:
- Lemon-shaped
- Anterior, hyaline knob (nipple-like)

A

Chilomastix mesnili

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42
Q

Trophozoite stage:
- Stiff, rotary motility “shepherd’s crook” appearance
- Prominent cytostome
- Spiral grooves across ventral surface

A

Chilomastix mesnili

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43
Q

Disease/Diagnosis
- Commensal

A

Chilomastix mesnili

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44
Q

NO cyst stage

A

Dientamoeba fragilis

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45
Q

Trophozoite stage:
- Amoeboid, “stellate” appearance
- Tetrakarvosome
- Explosive disintegration in water (“Hakansson
phenomenon”)
- Formerlv classified as amoeba

A

Dientamoeba fragilis

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46
Q

first intermediate host of D. latum

A

Copepod

47
Q

Cercaria dermatitis, commonly known as swimmer’s itch, is caused by

A

Schistosomes

48
Q

“Ground itch” occurs in infxns caused by hookworms

A

at the site of larval penetration of the skin

49
Q

intermediate host of Taenia asiatica

A

Pigs

50
Q

Cestodes without rostellum and hooks

A

T. saginata

51
Q

Mature proglottids have 7-15 finger-like branches

A

T. solium

52
Q

Eggs of D. latum resemble the eggs of

A

P. westermani

53
Q

Heart to lung migration occurs with

A

Ascaris, Strongyloides and Hookworms

54
Q

Gravid segments contain

A

Eggs

55
Q

Recovered form cestodes in stool are

A

Proglottids, scolex, ova

56
Q

diagnostic stage of this parasite is the rhabditiform larva

A

threadworm

57
Q

TRUE of W. bancrofti

A

pointed tip with no terminal nuclei

58
Q

In hydatidosis, man serves as

A

Accidental intermediate host

59
Q

Parthenogenic parasite

A

threadworm

60
Q

disease is associated with contact with soil, EXCEPT

A

Filariasis

Can be acquired through soil contact:
- Ascariasis
- Ancylostomiasis
- Trichuriasis
- Necatoriasis

61
Q

Incorrectly matched

  • E. granulosus = ova and parasite examinations
  • O. volvulus = skin snip examination
  • E. histolytica = stool staining with trichrome stain
  • S. haematobium = urine sediment examination
  • T. spiralis = tissue biopsy
A

E. granulosus = ova and parasite examinations

CORRECTLY MATCHED
- O. volvulus = skin snip examination
- E. histolytica = stool staining with trichrome stain
- S. haematobium = urine sediment examination
- T. spiralis = tissue biopsy

62
Q

migrating larvae of this parasite can be recovered in sputum

A

Ascaris lumbricoides

63
Q

Helminth infection that can induce the greatest increase of eosinophils in the peripheral blood

A

Trichinosis

64
Q

technique which can be used to cultivate larval stages of hookworms

A

Harada-Mori technique

65
Q

Human infxn with beef tapeworm is usually less serious that with pork tapeworm because

A

larval invasion does not occur in beef tapeworm infection

66
Q

Visceral larval migrans is associated with the following organism and test for identification

A

Toxocara spp = serology test

67
Q
  1. Humans can serve as both the intermediate and definitive host is caused by
A

Hymenolepis nana

68
Q

Incorrect match between disease and its symptom

  • oxyuriasis = dysyntery
  • Paragonimiasis = hemolysis
  • Cryptosporidiosis = watery diarrhea
  • Toxoplasmosis in HIV+ patients = CNS
A

oxyuriasis = dysyntery

CORRECTLY MATCHED
- Paragonimiasis = hemolysis
- Cryptosporidiosis = watery diarrhea
- Toxoplasmosis in HIV+ patients = CNS

69
Q

This condition results from the accidental ingestion of parasite eggs. In this instance, human becomes the intermediate rather than the definitive host.

A

Cysticercosis

70
Q

Has oral and ventral suckers

A

Trematodes

71
Q

True regarding onchocerciasis

A

the diagnostic method of choice is skin snip

72
Q

Hydatid disease in human is due to the ingestion of this tapeworm stage normally infective to herbivores

A

embryonated egg

73
Q

infective stage of this parasite is an egg with thin hyaline shell with one flattened side and fully developed larva within

A

Pinworm

74
Q

Loeffler’s syndrome is caused by parasites

A

with a heart and lung intestine migration

75
Q

Ascaris eggs seen in fresh stool

A

fertilized and unfertilized

76
Q

Mode of transmission of Fasciolopsis buski

A

Ingestion of metacercaria

77
Q

Ascaris lumbricoides, the most common roundworm, is carried by the mechanical vectors

A

Flies and cockroaches

78
Q

Infective stage of the broad fish tapeworm to man

A

Plerocercoid

79
Q

A blue stained egg around 75 microns in diameter and contains a hexacanth embryo that lacks polar knobs and filaments is that of

A

Hymenolepis diminuta

80
Q

A roundworm that inhabits that small intestine and usually is demonstrated as rhabditiform larvae in feces

A

threadworm

81
Q

Dracunculus infections cause ulcers that

A

on contact with water, release larvae

82
Q

Adults of filarial worms live in the

A

lymphatic and subcutaneous tissue

83
Q

Helminth that induces hypochromic monocytic anemia in the chronic course

A

Hookworm

84
Q

Organs of the body is most often involved in extraintestinal amoebiasis

A

liver

85
Q

Incorrectly paired with the appearance of its cyst

  • E. coli = basket nucleus
  • E. nana = cross eyed cyst
  • I. butschlli = large glycogen vacuole
  • E. histolytica = sausage-shaped chromatoidal bodies
A

E. coli = basket nucleus

Correctly paired
- E. nana = cross eyed cyst
- I. butschlli = large glycogen vacuole
- E. histolytica = sausage-shaped chromatoidal bodies

86
Q

cyst containing 8 nuclei most probably belong to

A

E. coli

87
Q

A gram stain from a gum lesion what appeared to be amoeba. A trichrome smear showed amoeba w/ a single nucleus and partially digested PMN. The best identification would be

A

E. gingivalis

88
Q

Intestinal parasite seen in an iodine-mount has 25 um diameter with a homogenously stained body surrounded by a thin rim of cytoplasm containing around 4 nuclei.

A

Blastocystis hominis

89
Q

protozoan cyst shows 4 nuclei with no chromatin on its nuclear membrane. Each nucleus has a large karyosome which appears as a refractive dot. Thus cyst is most likely that of

A

E. nana

90
Q

Best to differentiate E. histolytica from E. hartmanni

A

Shape of chromatoidal bodies

91
Q

It is trophozoite has a peripheral chromatin with beaded appearance, bull’s eye appearance, ground glass cytoplasm with RBC inclusion and unidirectional finger-like pseudopodia

A

E. histolytica

92
Q

This amoebic cyst is spherical, has an average size of 6-8 um, has 4 nuclei when mature through immature cysts with 1-2 nuclei are often present. The nuclei have a small central karyosome with uniform granules of peripheral chromatin. Chromatoidal bars with blunt ends are also often present

A

E. histolytica

93
Q

Has a double walled, wrinkled cyst form

A

Ancylostoma castellani

94
Q

An amoeba isolated from a patient with keratitis has spiny pseudopods, well-defined ectoplasm & endoplasm, & no flagellar phase noted is most likely

A

Acanthamoeba

95
Q

A patient noticed deterioration of vision after storing her contact lenses in tap water. She was diagnosed of retinitis. Culture of the tap water and of her vitreous fluid would most likely reveal

A

Acanthamoeba

96
Q

The best way of obtaining specimen in corneal ulcer

A

Scraping

97
Q

causes pingpong infxn. It contains siderophile granules and an undulating membrane which runs its body across the costa

A

T. vaginalis

98
Q

Bilaterally symmetrical

A

Giardia lamblia

99
Q

Type of blood specimen is preferred in preparing blood smears for protozoa

A

Capillary blood

-EDTA in UB

100
Q

commensal flagellate with a shepherd’s crook cystosomal fibril and appears like a twisted jar

A

Chilomastix mesnili

101
Q

parasite stage is the intracellular form of blood and tissue flagellates

A

Leishmanial

102
Q

Infective stage of Leishmania

A

Promastigote

-Man: IS: Promastigote
-Sandfly: IS: Amastigote

103
Q

Kala-azar is a form of

A

Visceral leishmaniasis

104
Q

T. cruzi multiplies is a skin called chagoma. In the chronic stage, the main lesions are often observed in the

A

heart and digestive tract

105
Q

The observation of piroplasms in packets of 2 or 3 or a maltese cross formation on stained blood films most likely indicates

A

Babesia microti

106
Q

Infective stage of malaria parasite to humans

A

Sporozoite

107
Q

pLDH meaning

A

Plasmodium lactate dehydrogenase

108
Q

traveler from Africa complains of paroxysmal attacks of chills, fever and sweating that last a day or 2 and recur every 36-48 hrs. Blood smear examination reveals ringlike and crescent-like forms within RBCs. The most probable parasite is

A

P. falciparum

109
Q

Applique or accole form of this parasite may be seen in blood films

A

P. falciparum

110
Q

The examination of blood smear may reveal

A
  • Babesia microti
  • Trypamosoma cruzi
  • Plasmodium falciparum
  • Wuchereria bancrofti
111
Q

causes of most (90%) malaria cases are

A

P. falciparum and P. vivax

112
Q

Giemsa stained blood smear showed many ring forms with no older stages, and a number of the rings have double chromatin dots. These findings are characteristic of

A

P. falciparum

113
Q

Partially acid fast protozoans

A
  • Cryptosporidium hominis
  • Cyclospora belli
  • Cyclospora cayatenensis

Parasit -Internship 2 (1 decks)

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