Chapter 3: Ameba QUIZ Flashcards
Amebic dysentery is caused by
A. Entamoeba histolytica
B. Entamoeba coli
C. Entamoeba gingivalis
D. Endolimax nana
Entamoeba histolytica
Primary amebic meningoencephalitis is
primarily caused by
A. Entamoeba histolytica
B. Naegleria fowleri
C. Entamoeba gingivalis
D. Acanthamoeba spp.
Naegleria fowleri
Transformation of a trophozoite stage into
a cyst stage
Encystation
Transformation of a cyst stage into a trophozoite stage
Excysation
The amebic stage with a thick cell wall allows for survival of the organism in the external environment
Cysts
A motile class of Protozoa equipped with pseudopods
Ameba
Extension of cytoplasm that aids ameba in motility
Pseudopods
The amebic stage is characterized by its ability to move and multiply
Trophozoites
Small mass of chromatin located within the nucleus of certain protozoan parasites
Karyosome
An intestinal amebic infection characterized by blood and mucus in the stool
Amebic dysentery
Amebic dysentery is caused by
A. Entamoeba histolytica
B. Entamoeba coli
C. Entamoeba gingivalis
D. Endolimax nana
Entamoeba histolytica
What is the special medium known that supports E. histolytica in culture?
TYI-S-33
Symptomatic intestinal amebiasis treatment, what recommended treatment for patients who have
progressed to extraintestinal amebiasis.
Metronidazole or tinidazole
Acanthamoeba infections of the cornea of the eye are known as?
Amebic keratitis
Parasites that non-treatment
- E. hartmanni
- E. coli
- E. nana
- I. butchlii
- E. gingivalis
Parasites that have treatment
- E. histolytica
- E. polecki
- Acanthamoeba spp
Replication only occurs in what stage; it is accomplished by multiplication of the nucleus via asexual binary fission.
Trophozoite
Formed stool specimens are more likely to contain
which of the following?
A. Trophozoites
B. Cysts
Cysts
It is defined as an INTESTINAL INFECTION caused by the presence of amebas exhibiting symptoms.
Amebic colitis
These patients may transition from amebic colitis into a condition characterized by blood and mucus in the stool known as
Amebic dysentery
Commonly associated disease or condition names of E. histolytica?
- Intestinal amebiasis
- Amebic colitis
- Amebic dysentery
- Extraintestinal amebiasis
What treatment may become symptomatic in the intestinal tract only or with subsequent extraintestinal invasion, in asymptomatic individuals?
- Paromomycin
- Diloxanide furoate (Furamide)
- Metronidazole (Flagyl)
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?
E. dispar
The infective stage of E. histolytica is which of the
following?
A. Trophozoite
B. Cyst
B. Cyst
What is the common associated disease or condition names of E. hartmanni?
- Intestinal amebiasis
- Amebic colitis
- Amebic dysentery
- Extraintestinal amebiasis
Infections with E. hartmanni, E. coli, E. polecki, E. nana,
Asymptomatic
What is the common associated disease or condition names of E. coli?
- Intestinal amebiasis
- Amebic colitis
- Amebic dysentery
- Extraintestinal amebiasis
What method of choice is used in E. histolytica?
- Enzyme-linked immunosorbent assay (ELISA)
- Indirect hemagglutination (IHA)
- Gel diffusion precipitin (GDP)
- Indirect immunofluorescence (IIF).
What methods of choice are used in
- Entamoeba hartmanni
- Entamoeba polecki
- Entamoeba coli
- Endolimax nana
- Iadamoeba butchlii
Stool samples
What is the commonly associated disease or condition names of E. polecki?
None
What is the treatment for E. polecki?
Metronidazole
What is the common associated disease or condition names of E. nana?
None
What is the common associated disease or condition names of Iadamoeba butchlii?
None
What is the common associated disease or condition names of E. gingivalis?
None
Nonpathogenic E. gingivalis trophozoites are frequently recovered in patients suffering from?
Pyorrhea alveolaris
What is the common associated disease or condition name of Naegleria fowleri?
Primary amebic meningoencephalitis (PAM)
Two whiplike structures that assist select parasites in locomotion known as?
Flagella
What is the method of choice of Naegleria fowleri?
Cerebrospinal fluid (CSF)
Defined as a diagnostic sign for meningitis.
Kernig’s sign
What medications used to treat meningitis and amebic infections are ineffective against N. fowleri?
Amphotericin B
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.
Naegleria australiensis
What is the common associated disease or condition names of Acanthamoeba species?
- Granulomatous amebic encephalitis (GAE)
- Acanthamoeba keratitis
The term acanthopodia refers to:
A. Spinelike pseudopods
B. Hairy projections
C. Double-layer cell wall
D. Large karyosome and no obvious peripheral
chromatin
Spinelike pseudopods
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
Cerebrospinal fluid (CSF)
CNS infections with Acanthamoeba are also known.
Granulomatous amebic encephalitis (GAE)
Acanthamoeba infections of the cornea of the eye are known as?
Amebic keratitis
What is the treatment for Acanthamoeba species?
Propamidine
Acanthamoeba shares many characteristics with
the gram-negative bacteria are known as the activity of Acanthamoeba spp?
Pseudomonas aeruginosa
Infections with Acanthamoeba species are encountered in which of the following anatomical parts?
A. Eye
B. Large intestines
C. Lungs
D. Liver
Eye
Primary amebic meningoencephalitis is
primarily caused by:
A. Entamoeba histolytica
B. Naegleria fowleri
C. Entamoeba gingivalis
D. Acanthamoeba spp.
B. Naegleria fowleri
