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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
What is the motility of Entamoeba coli
Sluggish
26
Where is the karyosome of Entamoeba histolytica located
Center
27
Location of Entamoeba coli karyosome
Eccentric
28
MOT of Entamoeba histolytica
Fecal-oral transmission
29
Life cycle of Entamoeba histolytica consists of 2 stages
Invasive trophozoite and infective cyst
30
Have the ability to colonize or invade the large bowel
Trophozoite
31
E. histolytica multiplies by
Binary fission
32
Can survive in a moist environment for weeks
E. histolytica cyst
33
Acute disease characterized by bloody diarrhea with abdominal cramping
Amebic dysentery
34
Infection of the intestines which causes diarrhea containing blood or mucus
Dysentery
35
Hexagonal structures formed formed from the breakdown of eosinophils and maybe seen in the stools
Chargot-Leyden crystals
36
Mimic ulcerative colitis
Amebic colitis
37
Develops a small, pinpoint mucosal ulcerations and expand within the submucosa to form flask-shaped ulcers
Amebic colitis
38
Most common form of extra intestinal amebiasis
Amebic liver abcess
39
Amount of stool specimens collected for the diagnosis of E. histolytica
3 stool specimens
40
Fresh stool should be examined within how many minutes
30 mins
41
Observe trophozoite motility
DFS with saline
42
Differentiates Entamoeba from WBC
Saline and Methylene blue
43
Nucleus and karyosome can be observed by
Iodine and saline
44
Drug of choice for Entamoeba histolytica
Metronidazole
45
It has a spherical nucleus with distinct nuclear membrane
Entamoeba
46
Has a vesicular nucleus with large and irregular shaped karyosome
Endolimax
47
Large chromatin rich karyosome surrounded by a layer of achromatic globules
Iodameoba
48
Morphologically similar to Entamoeba histolytica but differ in DNA and RNA
Entamoeba dispar
49
They are first detected in sewage
Entamoeba moshkovskii
50
Physiologically unique-osmotolerant and able to survive at 0-41 degrees celsius
Entamoeba moshovskii
51
Has been called small race Entamoeba histolytica
Entamoeba hartmanni
52
Cosmopolitan in distribution and is more common than other human amoeba
Entamoeba coli
53
A parasite found in the intestines of pigs and monkeys
Entamoeba polecki
54
It can be found in the oral cavity
Entamoeba gingivalis
55
Trophozoite measurement of E. gingivalis
10-20 micrometer
56
It moves quickly because it has numerous pseudopods
Entamoeba gingivalis
57
Amoeba that has no cyst stage
Entamoeba gingivalis
58
The smallest amoeba to infect humans
Endolimax nana
59
How many nuclei does Endolimax nana have
4
60
Cyst is seen as cross eyed
Endolimax nana
61
What is found in formed stools
Cysts
62
What is found in liquid or semi formed stools
Trophozoite
63
It is added to enhance nuclear detail and avoid confusion of amoeba with other blood cellular elements
Methylene blue
64
Trophozoites are best demonstrated by using what technique
Direct fecal smear
65
Usually found in contact lenses solution
Acanthamoeba keratitis
66
An aquatic organism that is found in myriad of natural and artificial environments
Acanthamoeba species
67
Thorn-like appendages and a highly resilient cyst stage
Acanthamoeba species
68
Opportunistic ocular surface pathogens causing keratitis
Acanthamoeba keratitis
69
Major causative agent for Primary Amebic Meningoenciphilitis
Naegleria species
70
Most commonly acquired by diving or swimming during hot weather
Naegleria species
71
Thermophilic organism that throve best in hot springs
Naegleria species
72
The only species of Naegleria to infect people
Naegleria fowleri
73
Usually found in CSF and tissue
Naegleria fowleri trophozoites
74
Found in CSF
flagellated forms of Naegleria fowleri
75
Able to survive in elevated temperatures and reproduces rapidly in temperatures above 30 celsius
Naegleria fowleri

PARASITOLOGY LECTURE (3 decks)

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