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[OS 214] GI Exam 1 Cluster 4 > Lec 14: Water-Borne Protozoans > Flashcards

Lec 14: Water-Borne Protozoans Flashcards

1
Q

ID: What is the infective stage of Entamoeba histolytica?

A

cyst

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2
Q

ID: This polyribosomal structure is characteristic of E. histolytica.

A

cigar-shaped chromatoidal bars

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3
Q

ID: What is the morphology of the lesion caused by E. histolytica?

A

flask-shaped ulcer

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4
Q

Which non-pathogenic amoeba contains large glycogen vacuoles?

A. Entamoeba dispar
B. Entamoeba hartmanni
C. Entamoeba coli
D. Endolimax nana
E. Iodamoeba butschlii
A

E.

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5
Q

ID: E. histolytica causes what disease?

A

amoebic dysentery

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6
Q

Which E. histolytica virulence factor is responsible for its adherence to the mucosa?

A. GalNAc lectin
B. Amoebapore
C. Cysteine proteases
D. KN adhesin
E. NOTA
A

A. GalNAc lectin

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7
Q

Amoebic liver abscess has a predisposition to occur where?

A. R liver lobe
B. L liver lobe
C. caudate liver lobe
D. portal vein
E. no predisposition
A

A. R liver lobe

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8
Q

What is the recommended number of stool exam for diagnosis of E. histolytica infection?

A. 2x
B. 3x
C. 4x
D. any number of times
E. depends on institution
A

B. 3x

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9
Q

ID: The detection of this substance in PCR differentiates E. histolytica from E. dispar.

A

adherence lectin

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10
Q

ID: This test is useful when suspecting amoebic liver abscess.

A

ultrasonography

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11
Q

ID: What is the treatment for asymptomatic cyst carriers?

A

diloxanide furoate

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12
Q

ID: What is the treatment for intestinal and amoebic liver abscess?

A

metronidazole

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13
Q

Giardia lamblia resides in which part of the gastrointestinal tract?

A. stomach
B. duodenum
C. small intestines
D. large intestines
E. cecum
A

B & C

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14
Q

This is associated with the pathology of G. lamblia infection.

A. falling leaf motion
B. binary fission
C. sucking disc
D. flagellar attachment
E. binucleation
A

C. sucking disc

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15
Q

What is the characteristic diarrhea caused by G. lamblia?

A. watery
B. fatty
C. bloody
D. dark
E. NOTA
A

B. fatty or steatorrheic

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16
Q

ID: This is the gold standard in detection of G. lamblia.

A

microscopic detection

17
Q

T/F: Cryptosporidium infection is self-limiting in immunocompetent individuals.

A

T

18
Q

ID: This stain may be used in the ID of Cryptosporidium.

A

acid-fast stain

19
Q

ID: What type of diarrhea is caused by Cryptosporidium?

A

watery, cholera-like diarrhea

20
Q

ID: What is the current drug used for treatment of Cryptosporidium?

A

nitazoxanide

[OS 214] GI Exam 1 Cluster 4 (4 decks)

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