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Parasitology > Amoeba/Protozoa > Flashcards

Amoeba/Protozoa Flashcards

0
Q

The only amoeba that ingests WBC

A

Entamoeba gingivalis

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1
Q

What is the smallest amoeba?

A

Endolimax nana

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2
Q

It has a well defined glycogen mass w/ definite borders

A

Iodamoeba butschlii

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3
Q

Treatment for E.histolytica and its mode of action

A

Metronidazole; Interferes w/ DNA replication

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4
Q

Organ of locomotion of Acanthamoeba spp.

A

Acanthopodia

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5
Q

Differentiate the E.histolytica from E.coli according to the chromatin body, type of pseudopod, number of nucleus, movement, and location of karyosome

A

E.histolytica: cigar shape chromatin body, clear finger-like pseudopod, directional movement, 4 nucleus and central karyosome

E.coli: splinter-like chromatin body, blunt pseudopod, sluggish movement, 8 nucleus (mature cyst) and peripheral karyosome

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6
Q

Site of infection of intestinal E.histolytica

A 
Small Intestine (excystation)
Large Intestine (trophozoite settle in its lumen)
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7
Q

Site of infection of extraintestinal E.histolytica

A

Liver

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8
Q

What is the aspirated material from the Amebic liver abscess?

A

Anchovy paste

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9
Q

Difference of amebic dysentery and amebic colitis

A

Amebic dysentery: characterized by blood and mucus in the stool

mebic colitis: infection caused by amoebic presence in the intestine

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10
Q

It causes flask-shaped ulcer in the colon?

A

Entamoeba histolytica

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11
Q

What is the etiologic agent of E.histolytica infection?

A

Amoebic dysentery

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12
Q

Common water contaminant

A

Entamoeba coli

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13
Q

Sign that the organism is invasive and pathologic?

A

Blood in the cytoplasm

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14
Q

Commonly found in Papua, New Guinea

A

Entamoeba polecki

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15
Q

Similar to E.histolytica but is much smaller

A

Entamoeba hartmanni

16
Q

Characterized by the absence of chromatin and clean cytoplasm

A

Endolimax nana

17
Q

Commonly found in the mouth

A

Entamoeba gingivalis

18
Q

Similar to E.nana (the only difference is that E.nana has 4 nucleus and this has only 1)

A

Iodamoeba butschlii

19
Q

Flask-shaped ulcer is caused by?

A

E.histolytica

20
Q

Amoeba that has no cystic stage?

A

E.gingivalis

21
Q

Characterized by a basket nucleus and iodine cyst?

A

I.butschlii

22
Q

Amoebas that has 1 nucleus?

A

E.polecki

I.butschlii

23
Q

True pathogen’s amoebas

A

Naegleria fowleri

Acathamoeba sp.

24
Q

What is the mode of entry of Naegleria fowleri?

A

Nasal cavity

25
Q

Naegleria fowleri is acquired through?

A

Contaminated pools

26
Q

Disease caused by Naegleria fowleri

A

Primary Amebic encephalitis

27
Q

Treatment for True pathogens?

A

Amphotericin B

28
Q

Difference between N.fowleri and Acanthamoeba?

A

N.fowleri has flagellated stage but Acanthamoeba is more resistant

29
Q

How is Acanthamoeba transmitted?

A

Through contaminated lens care solution

Contaminated pools

30
Q

Individuals who are affected by Acanthamoeba are mostly the?

A

Immunicompromised
Contact lens wearer
Those who experienced corneal trauma

31
Q

Disease caused by Acanthamoeba?

A

GAE/Granulomatous Amebic Encephalitis (Type 4 Hypersensitivity Reaction)

Types:
Keratitis:contact lens
Dermatitis:skin

32
Q

This species is not found in tissues and can only be seen in culture

A

Naegleria fowleri

33
Q

Morphology can be seen on wet preparation

A

Acanthamoeba spp.

34
Q

Mortality for Acanthamoeba sp.

A

70% w/o CNS Involvement

100% w/ CNS Involvement

35
Q

Mode of entry of Acanthamoeba

A

May enterthrough lower respiratory tract or through ulcerated or broken skin

36
Q

Two factors involved with Keratitis

A

Trauma

Contaminated water

Parasitology (8 decks)

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