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PH 172 > Entamoeba, Blastocystis > Flashcards

Entamoeba, Blastocystis Flashcards

1
Q 
Centrally located karyosome
Ingested RBC (proof of invasion)

True for what devt stages of what species?

A

Entamoeba histolytica

Trophozoite

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2
Q

The cysts of E.histolytica are not yet infective when they are excreted in the stool. T/F?

A

F

Infective na sila

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3
Q

Most common method of transmission for E.histolytica

A

Contam drinking water/food

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4
Q

How is water contam by E.histolytica?

A

Sewage water and drinking water are parallel

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5
Q

How is food contam by E histolytica via mech vector?

A

They have sticky hairs to which the infective cysts attach.

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6
Q

Gold standard for E histolytica diagnosis

A

PCR (DNA detection)

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7
Q

[E histolytica]

excystation. The cyst excysts producing __ metacystic trophozoites.

A

8

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8
Q

Main pathology of E histolytica

A

Lysis of cells and tissues

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9
Q

In the large intestine/colon, trophozoites invade the mucosal and submucosal cells, forming the basic pathology of ___

A

flask-shaped ulcer

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10
Q

[E histolytica]

From the large intestines, they can go to the liver and produce abscess. Trophozoites in the liver can go up, cross the diaphragm and into the lower right lobe of the lung producing pulmonary abscess. Why?

A

Pseudopodia

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11
Q

[E histolytica]

It causes dehydration because of ___This is the triggering factor for the trophozoites to protect themselves; .

A

Diarrhea

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12
Q

[E histolytica]

Bc diarrhea, the trophozoites undergo ___ –> feces

A

Encystation

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13
Q

In stained fecal smears the cigar shaped chromatoidal bar can be seen.true for what devt stage and what species?

A

Cyst

Entamoeba histolytica

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14
Q

most common form of Blastocystis hominis in stool specimen

A

vacuolar form

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15
Q

only difference of Entamoeba hartmanni with E histolytica

A

size

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16
Q

Which is false about E.histolytica diagnosis?
A. Mini gel electrophoresis separates DNA molecule
B. Mucosal scrapes are examined from small intestine.
C. Both are false.

A

B

Large dapat

17
Q

most common cause of amebic liver abscess in developing countries - what mode/s of transmission?

A

genitourinary

cutaneous

18
Q

identify

has a glycogen vacuole that occupies the whole cyst, pushing nucleus to periphery

A

Iodameba butschlii

19
Q

T/F

Entameba coli has chromatoidal bar

A

T

splinter-shaped

20
Q

False about Acathameba
A. acanthopods: reproductive cells
B. treatment: Amphothericin B
C. both are false

A

A

spine-like processes dapat

21
Q

false about diagnosis of Acanthameba
A. trophozoites in stool
B. cysts in brain tissue & corneal scrapings
C. both are false

A

A

CSF dapat

22
Q

Difference between Naegleria and Acanthameba in terms of disease caused.

A

Acanthameba: with granuloma

23
Q

special clin manif @ Naegleria

A

Kernig’s sign

24
Q

Naegleria diagnosis: trophozoites @ CSF, char by ___

A

blunt pseudopodia

25
Q

False about Naegleria & Acanthameba
A. enter nose of human while swimming @ contam water
B. migrate @ trigeminal nerves
C. both are false

A

B

Olfactory dapat

26
Q

infective stage of Naegleria & Acanthameba

A

trophozoite

27
Q

Which part of the liver usually has abscess c/o E histolytica?

A

right lobe of liver

28
Q

false about amebic dysentery
A. diarrhea is always with blood and mucus
B. manif of intestinal amebiasis
C. tumorlike in 1% of population

A

A

pwede walang dugo

29
Q

@ extra-intestinal amebiasis, where can there be pulmo abscess

A

lower lobe of right lung

30
Q

E histolytica may cause ___ in the brain

A

meningoencephalitis

31
Q

[E histolytica]

freshly voided stool must be seen within 30 mins to view ___

A

trophozoite

32
Q

[E histolytica]

culture used in diagnosis

A

Robinson’s culture

33
Q

[E histolytica]

most commonconcentration method used for stool exam

A

Formalin Ether Concentration

34
Q

[E histolytica]

describe aspirate of liver infected with E histolytica

A

anchovy sauce-like

35
Q

[E histolytica]

indirect fluorescent AB test: what antigen is used?

A

trophozoite of E histo

36
Q

[E histolytica]

stool ELISA detects ___

A

adherence lectin

37
Q

[E histolytica]

DNA is extracted fr stool via what method?

A

phenol chloroform extraction

38
Q

[B hominis]

enumerate signs and symptoms

A

diarrhea, abdominal pain, bloating

PH 172 (25 decks)

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