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Clinical Parasitology > Chapter 3: Ameba QUIZ > Flashcards

Chapter 3: Ameba QUIZ Flashcards

1
Q

Amebic dysentery is caused by

A. Entamoeba histolytica
B. Entamoeba coli
C. Entamoeba gingivalis
D. Endolimax nana

A

Entamoeba histolytica

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2
Q

Primary amebic meningoencephalitis is
primarily caused by

A. Entamoeba histolytica
B. Naegleria fowleri
C. Entamoeba gingivalis
D. Acanthamoeba spp.

A

Naegleria fowleri

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3
Q

Transformation of a trophozoite stage into
a cyst stage

A

Encystation

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4
Q

Transformation of a cyst stage into a trophozoite stage

A

Excysation

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5
Q

The amebic stage with a thick cell wall allows for survival of the organism in the external environment

A

Cysts

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6
Q

A motile class of Protozoa equipped with pseudopods

A

Ameba

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7
Q

Extension of cytoplasm that aids ameba in motility

A

Pseudopods

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8
Q

The amebic stage is characterized by its ability to move and multiply

A

Trophozoites

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9
Q

Small mass of chromatin located within the nucleus of certain protozoan parasites

A

Karyosome

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10
Q

An intestinal amebic infection characterized by blood and mucus in the stool

A

Amebic dysentery

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11
Q

Amebic dysentery is caused by

A. Entamoeba histolytica
B. Entamoeba coli
C. Entamoeba gingivalis
D. Endolimax nana

A

Entamoeba histolytica

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12
Q

What is the special medium known that supports E. histolytica in culture?

A

TYI-S-33

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13
Q

Symptomatic intestinal amebiasis treatment, what recommended treatment for patients who have
progressed to extraintestinal amebiasis.

A

Metronidazole or tinidazole

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14
Q

Acanthamoeba infections of the cornea of the eye are known as?

A

Amebic keratitis

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15
Q

Parasites that non-treatment

A
  • E. hartmanni
  • E. coli
  • E. nana
  • I. butchlii
  • E. gingivalis
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16
Q

Parasites that have treatment

A
  • E. histolytica
  • E. polecki
  • Acanthamoeba spp
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17
Q

Replication only occurs in what stage; it is accomplished by multiplication of the nucleus via asexual binary fission.

A

Trophozoite

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18
Q

Formed stool specimens are more likely to contain
which of the following?

A. Trophozoites
B. Cysts

A

Cysts

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19
Q

It is defined as an INTESTINAL INFECTION caused by the presence of amebas exhibiting symptoms.

A

Amebic colitis

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20
Q

These patients may transition from amebic colitis into a condition characterized by blood and mucus in the stool known as

A

Amebic dysentery

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21
Q

Commonly associated disease or condition names of E. histolytica?

A
  • Intestinal amebiasis
  • Amebic colitis
  • Amebic dysentery
  • Extraintestinal amebiasis
22
Q

What treatment may become symptomatic in the intestinal tract only or with subsequent extraintestinal invasion, in asymptomatic individuals?

A
  • Paromomycin
  • Diloxanide furoate (Furamide)
  • Metronidazole (Flagyl)
23
Q

A nonpathogenic ameba that has been identified that is morphologically identical to E. histolytica due to lack RBCs and/or cysts are recovered, known as?

A

E. dispar

24
Q

The infective stage of E. histolytica is which of the
following?

A. Trophozoite
B. Cyst

A

B. Cyst

25
Q

What is the common associated disease or condition names of E. hartmanni?

A
  • Intestinal amebiasis
  • Amebic colitis
  • Amebic dysentery
  • Extraintestinal amebiasis
26
Q

Infections with E. hartmanni, E. coli, E. polecki, E. nana,

A

Asymptomatic

27
Q

What is the common associated disease or condition names of E. coli?

A
  • Intestinal amebiasis
  • Amebic colitis
  • Amebic dysentery
  • Extraintestinal amebiasis
28
Q

What method of choice is used in E. histolytica?

A
  • Enzyme-linked immunosorbent assay (ELISA)
  • Indirect hemagglutination (IHA)
  • Gel diffusion precipitin (GDP)
  • Indirect immunofluorescence (IIF).
29
Q

What methods of choice are used in

  • Entamoeba hartmanni
  • Entamoeba polecki
  • Entamoeba coli
  • Endolimax nana
  • Iadamoeba butchlii
A

Stool samples

30
Q

What is the commonly associated disease or condition names of E. polecki?

A

None

31
Q

What is the treatment for E. polecki?

A

Metronidazole

32
Q

What is the common associated disease or condition names of E. nana?

A

None

33
Q

What is the common associated disease or condition names of Iadamoeba butchlii?

A

None

34
Q

What is the common associated disease or condition names of E. gingivalis?

A

None

35
Q

Nonpathogenic E. gingivalis trophozoites are frequently recovered in patients suffering from?

A

Pyorrhea alveolaris

36
Q

What is the common associated disease or condition name of Naegleria fowleri?

A

Primary amebic meningoencephalitis (PAM)

37
Q

Two whiplike structures that assist select parasites in locomotion known as?

A

Flagella

38
Q

What is the method of choice of Naegleria fowleri?

A

Cerebrospinal fluid (CSF)

39
Q

Defined as a diagnostic sign for meningitis.

A

Kernig’s sign

40
Q

What medications used to treat meningitis and amebic infections are ineffective against N. fowleri?

A

Amphotericin B

41
Q

One noteworthy species of Naegleria that
could possibly infect humans in the future is
known as?

It has been found to be pathogenic in mice that have been exposed to this parasite by intranasal
instillation.

A

Naegleria australiensis

42
Q

What is the common associated disease or condition names of Acanthamoeba species?

A
  • Granulomatous amebic encephalitis (GAE)
  • Acanthamoeba keratitis
43
Q

The term acanthopodia refers to:
A. Spinelike pseudopods
B. Hairy projections
C. Double-layer cell wall
D. Large karyosome and no obvious peripheral
chromatin

A

Spinelike pseudopods

44
Q

The specimen of choice for diagnosing Acanthamoeba species trophozoites and cysts is which of the following?

A. Urine
B. Sputum
C. Cerebrospinal fluid
D. Stool

A

Cerebrospinal fluid (CSF)

45
Q

CNS infections with Acanthamoeba are also known.

A

Granulomatous amebic encephalitis (GAE)

46
Q

Acanthamoeba infections of the cornea of the eye are known as?

A

Amebic keratitis

47
Q

What is the treatment for Acanthamoeba species?

A

Propamidine

48
Q

Acanthamoeba shares many characteristics with
the gram-negative bacteria are known as the activity of Acanthamoeba spp?

A

Pseudomonas aeruginosa

49
Q

Infections with Acanthamoeba species are encountered in which of the following anatomical parts?
A. Eye
B. Large intestines
C. Lungs
D. Liver

A

Eye

50
Q

Primary amebic meningoencephalitis is
primarily caused by:

A. Entamoeba histolytica
B. Naegleria fowleri
C. Entamoeba gingivalis
D. Acanthamoeba spp.

A

B. Naegleria fowleri

Clinical Parasitology (7 decks)

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