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PARASITOLOGY LECTURE > Amoeba > Flashcards

Amoeba Flashcards

1
Q

What is the outer membrane of amoeba called

A

Periplast

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2
Q

The outer region of the cytoplasm in amoeba

A

Ectoplasm

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3
Q

The inner region in the cytoplasm of amoeba

A

Endoplasm

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4
Q

Unicellular eukaryotes with membrane bound organelles

A

Amoeba

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5
Q

Responsible for the osmoregulation of amoeba

A

Contractile vacuole

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6
Q

An amoeba can have how many nucleus

A

2 or more

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7
Q

What are the food sources of amoeba

A

Bacteria and protists

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8
Q

What is the nutrition of amoeba called

A

Holozoic

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9
Q

Process where the entire organism engulfs the food it plans on eating up

A

Phagocytosis

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10
Q

All amoeba are commensals except for

A

Entamoeba histolytica

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11
Q

All amoeba are found in the colon except

A

Entamoeba gingivalis

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12
Q

Small karyosome at or near the center

A

Entamoeba

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13
Q

Large, irregular karyosome attached to nuclear membrane it has nor peripheral chromatin and it forms cysts

A

Endolimax

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14
Q

Large karyosome surrounded by achromatic granules it has no peripheral chromatin

A

Iodamoeba

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15
Q

Generally binucleate; central particulate karyosome

A

Dientamoeba

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16
Q

What are the 3 genera of amoeba that inhibit the intestinal tract

A

Entamoeba, Endolimax and Iodamoeba

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17
Q

The only amebic specie that is capable of invading tissues and causing disease

A

Entamoeba histolytica

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18
Q

Most invasive and pathogenic kind of amoeba

A

Entamoeba histolytica

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19
Q

The most common method for diagnosing E. histolytica

A

Microscopic identification of cysts and trophozoite

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20
Q

Shows chromatid body with a bluntly rounded end

A

Entamoeba histolytica

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21
Q

How many nuclei does E. histolytica has

A

4

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22
Q

Pseudopods in E. histolytica is

A

Finger like

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23
Q

Pseudopods in Entamoeba coli is

A

Blunt or rounded

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24
Q

What is the motility of Entamoeba histolytica

A

Progressive and directional

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25
Q

What is the motility of Entamoeba coli

A

Sluggish

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26
Q

Where is the karyosome of Entamoeba histolytica located

A

Center

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27
Q

Location of Entamoeba coli karyosome

A

Eccentric

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28
Q

MOT of Entamoeba histolytica

A

Fecal-oral transmission

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29
Q

Life cycle of Entamoeba histolytica consists of 2 stages

A

Invasive trophozoite and infective cyst

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30
Q

Have the ability to colonize or invade the large bowel

A

Trophozoite

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31
Q

E. histolytica multiplies by

A

Binary fission

32
Q

Can survive in a moist environment for weeks

A

E. histolytica cyst

33
Q

Acute disease characterized by bloody diarrhea with abdominal cramping

A

Amebic dysentery

34
Q

Infection of the intestines which causes diarrhea containing blood or mucus

35
Q

Hexagonal structures formed formed from the breakdown of eosinophils and maybe seen in the stools

A

Chargot-Leyden crystals

36
Q

Mimic ulcerative colitis

A

Amebic colitis

37
Q

Develops a small, pinpoint mucosal ulcerations and expand within the submucosa to form flask-shaped ulcers

A

Amebic colitis

38
Q

Most common form of extra intestinal amebiasis

A

Amebic liver abcess

39
Q

Amount of stool specimens collected for the diagnosis of E. histolytica

A

3 stool specimens

40
Q

Fresh stool should be examined within how many minutes

41
Q

Observe trophozoite motility

A

DFS with saline

42
Q

Differentiates Entamoeba from WBC

A

Saline and Methylene blue

43
Q

Nucleus and karyosome can be observed by

A

Iodine and saline

44
Q

Drug of choice for Entamoeba histolytica

A

Metronidazole

45
Q

It has a spherical nucleus with distinct nuclear membrane

46
Q

Has a vesicular nucleus with large and irregular shaped karyosome

47
Q

Large chromatin rich karyosome surrounded by a layer of achromatic globules

48
Q

Morphologically similar to Entamoeba histolytica but differ in DNA and RNA

A

Entamoeba dispar

49
Q

They are first detected in sewage

A

Entamoeba moshkovskii

50
Q

Physiologically unique-osmotolerant and able to survive at 0-41 degrees celsius

A

Entamoeba moshovskii

51
Q

Has been called small race Entamoeba histolytica

A

Entamoeba hartmanni

52
Q

Cosmopolitan in distribution and is more common than other human amoeba

A

Entamoeba coli

53
Q

A parasite found in the intestines of pigs and monkeys

A

Entamoeba polecki

54
Q

It can be found in the oral cavity

A

Entamoeba gingivalis

55
Q

Trophozoite measurement of E. gingivalis

A

10-20 micrometer

56
Q

It moves quickly because it has numerous pseudopods

A

Entamoeba gingivalis

57
Q

Amoeba that has no cyst stage

A

Entamoeba gingivalis

58
Q

The smallest amoeba to infect humans

A

Endolimax nana

59
Q

How many nuclei does Endolimax nana have

60
Q

Cyst is seen as cross eyed

A

Endolimax nana

61
Q

What is found in formed stools

62
Q

What is found in liquid or semi formed stools

A

Trophozoite

63
Q

It is added to enhance nuclear detail and avoid confusion of amoeba with other blood cellular elements

A

Methylene blue

64
Q

Trophozoites are best demonstrated by using what technique

A

Direct fecal smear

65
Q

Usually found in contact lenses solution

A

Acanthamoeba keratitis

66
Q

An aquatic organism that is found in myriad of natural and artificial environments

A

Acanthamoeba species

67
Q

Thorn-like appendages and a highly resilient cyst stage

A

Acanthamoeba species

68
Q

Opportunistic ocular surface pathogens causing keratitis

A

Acanthamoeba keratitis

69
Q

Major causative agent for Primary Amebic Meningoenciphilitis

A

Naegleria species

70
Q

Most commonly acquired by diving or swimming during hot weather

A

Naegleria species

71
Q

Thermophilic organism that throve best in hot springs

A

Naegleria species

72
Q

The only species of Naegleria to infect people

A

Naegleria fowleri

73
Q

Usually found in CSF and tissue

A

Naegleria fowleri trophozoites

74
Q

Found in CSF

A

flagellated forms of Naegleria fowleri

75
Q

Able to survive in elevated temperatures and reproduces rapidly in temperatures above 30 celsius

A

Naegleria fowleri

PARASITOLOGY LECTURE (3 decks)

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