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protozoans > intestinal protozoa > Flashcards

intestinal protozoa Flashcards

1
Q

-Single-cell eukaryotic organisms
-Feeds on organic matter like bacteria and tissue
debris
-forms cyts and tropozoite

A

protozoa

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2
Q

classification of intestinal protozoa

A

sarcodina, flagellates, ciliates, heterokonts

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3
Q

-Feeding vegetative stage
- Has pseudopods, flagella or
cilia for locomotion

A

tropozoites

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4
Q

-Infective stage
- Resistant to environmental
changes

A

cyts

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5
Q 
morphology of E. histolytica tropozoite
size:
movement:
pseudopods:
chromatin:
nucleus:
cytoplasm:
inclusions:
A

-Size: 12- 35um
- Movement: Unidirectional,
progressive
- Pseudopods: finger-like or
knife-like
- Chromatin: Regular, fine, even distributed chromatin
pattern
- Nucleus: Small & centrally located karyosome
- Cytoplasm: Finely granular
- Inclusions: Ingested RBC, bacteria with scanty
vacuoles

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6
Q 
morphology of E. histolytica cyts
size:
nucleus:
chromatin:
cytoplasm:
inclusions:
A

-Size: 12-15um
- Nucleus: quadrinucleated (1-4)
- Chromatin: Regular, fine, even
distributed
- Cytoplasm: Finely granular
- Inclusions: cigar shaped (chromatoid bar)

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7
Q 
morphology of E. coli trophozoites
size:
movement:
pseudopods:
chromatin:
nucleus:
cytoplasm:
inclusions:
A

-Size: 12- 20um
- Movement: Non-motile,
sluggish
- Pseudopods: blunt and
granular
- Chromatin: Thick, unevenly
distributed peripheral
chromatin
- Nucleus: large eccentric karyosome
- Cytoplasm: Coarse granular, vacuolated
- Inclusions: bacteria with numerous
vacuoles

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8
Q 
morphology of E. coli cyts
size:
nucleus:
chromatin:
cytoplasm:
inclusions:
A

-Size: 12-15um
- Nucleus: 5-8 nuclei
- Chromatin: Thick, unevenly distributed
- Cytoplasm: Coarse granular
- Inclusions: needle-shape chromatoidal
bars with splintered ends, diffuse
glycogen mass (appears red in iodine)

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9
Q 
morphology of E. hartmanni trophozoites
size:
movement:
pseudopods:
chromatin:
nucleus:
cytoplasm:
inclusions:
A

-Size: 4-10um
- Movement: sluggish
- Pseudopods: finger-like or
knife-like
- Chromatin: Regular, fine,
even distributed chromatin
pattern
- Nucleus: Small & centrally located
karyosome
- Cytoplasm: Finely granular
- Inclusions: bacteria with scanty
vacuoles

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10
Q 
morphology of E. hartmanni cyts
size:
nucleus:
chromatin:
cytoplasm:
inclusions:
A
  • Size: 5-10um
  • Nucleus: 1-4 nuclei
  • Chromatin: Fine & evenly distributed
  • Cytoplasm: Fine granular
  • Inclusions: short grain or grape-like chromatoidal bars
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11
Q 
morphology of Iodamoeba butschlii tropozoites
size:
movement:
pseudopods:
chromatin:
nucleus:
cytoplasm:
inclusions:
A

-Size: 10-15um
- Movement: sluggish
- Pseudopods: blunt
finger-like
- Chromatin: Regular, fine,
even distributed
chromatin pattern
- Nucleus: Large & centrally located
karyosome
- Cytoplasm: Granular and vacuolated
- Inclusions: bacteria with scanty
vacuoles

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12
Q 
morphology of Iodamoeba butschlii cyts
size:
nucleus:
chromatin:
cytoplasm:
inclusions:
A

-Size: 8-10um
- Nucleus: 1 only
- Chromatin: Absent
- Cytoplasm: Coarsely granular and vacuolated
cytoplasm, eccentric achromatic granules on one side
- Inclusions: large glycogen vacuole that stains well with
iodine

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13
Q 
morphology of Endolimax nana trophozoites
size:
movement:
pseudopods:
chromatin:
nucleus:
cytoplasm:
inclusions:
A

-Size: 8-10 um
- Movement: sluggish
- Pseudopods: blunt and
numerous
- Chromatin: Absent
- Nucleus: Large, central,
irregular,
“blotlike” karyosome
- Cytoplasm: Granular
- Inclusions: bacteria with
scanty vacuoles

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14
Q 
morphology of Endolimax nana cyts
size:
nucleus:
chromatin:
cytoplasm:
inclusions:
A
  • Size: 8-10um
  • Nucleus: 1-4 with blot-like karyosome
  • Chromatin: No peripheral chromatin
  • Cytoplasm: Granular and vacuolated
  • Inclusions: no glycogen vacuole, mostly granules
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15
Q 
morphology of Dientamoeba fragilis trophozoites
size:
movement:
pseudopods:
chromatin:
nucleus:
cytoplasm:
inclusions:
A
  • Size: 6-15 um
  • Movement: non-motile
  • Pseudopods: propeller-blade like
  • Chromatin: Evenly distributed
  • Nucleus: Single with granulated karyosome
  • Cytoplasm: Granular
  • Inclusions: bacteria
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16
Q

does D. fragilis and E. gingivalis have cyts stage?

A

no

17
Q 
morphology of Entamoeba gingivalis trophozoites
size:
movement:
pseudopods:
chromatin:
nucleus:
cytoplasm:
inclusions:
A
  • Size: 8-15 um
  • Movement: moderately progressive
  • Pseudopods: blunt
  • Chromatin: Evenly-distributed
  • Nucleus: Large central karyosome
  • Cytoplasm: Granular
  • Inclusions: leukocyte, epithelial cells, rbc, bacteria
18
Q

morphology of Giardia lamblia trophozoites

A 
-Old man with eye glasses; bilaterally
symmetrical
- Pyriform or teardrop shaped
- Two nuclei with large karyosome
- Four pairs of flagella
- Two median bodies, 2 axonemes & 2 sucking disk
- Falling leaf motility
19
Q

morphology of Giardia lamblia cyts

A
  • Ovoid
  • 4 nuclei and median body
  • Central karyosome
  • Cytoplasm retracted from cells wall
  • Interior flagellar structures
20
Q 
morphology of Chilomastix mesnili trophozoites
size:
shape:
flagella:
inclusion:
A

-Size: 10-15um
- Pear-shaped
- Stiff rotary motility
- Flagella:
o 3 from anterior
o 1 from cytosome
region
- Inclusion: Prominent cytosome; spiral
groove

21
Q

morphology of Chilomastix mesnili cyts
size:
nucleus:
shape:

A

-Size: 6-8 um
- 1 nucleus
- Lemon shaped with
clear hyaline knob

22
Q 
morphology of Trichomonas hominis trophozoites
Habitat:  
Size: 
Nucleus: 
Undulation membrane: 
Inclusion bodies: 
Specimen for diagnosis:
A
  • Habitat: intestines
  • Size: medium
  • Nucleus: ovoid
  • Undulation membrane: as long as the costa
  • Inclusion bodies: none
  • Specimen for diagnosis: stool
23
Q 
morphology of Trichomonas tenax trophozoites
Habitat:  
Size: 
Nucleus: 
Undulation membrane: 
Inclusion bodies: 
Specimen for diagnosis:
A
  • Habitat: Oral Cavity
  • Size: smallest
  • Nucleus: round
  • Undulation membrane: 2/3 of the costa
  • Inclusion bodies: none
  • Specimen for diagnosis: oral scrapings
24
Q 
morphology of Trichomonas vaginalis trophozoites
Habitat:  
Size: 
Nucleus: 
Undulation membrane: 
Inclusion bodies: 
Specimen for diagnosis:
A

-Habitat: genitals
- Size: largest
- Nucleus: ovoid
- Undulation membrane:
less than half of the costa
- Inclusion bodies: siderophil granules
- Specimen for diagnosis: urine, vaginal
discharge, prostatic secretions

25
Q 
morphology of B. coli cyst
no. of nuclei:
shape of nuclei:
vacuoles:
wall:
location of cilia:
A 
-Two nuclei:
o Kidney shape 
macronucleus
o Small spherical 
micronucleus
- 1-2 contractile vacuoles
- Double cyst wall
- Row of cilia between cyst wall layers
26
Q 
morphology of Balantidium coli trophozoites
movements:
no. of nuclei:
shape of nuclei:
vacuoles:
does the cytostome present or absent?
does it have numerous bristles
A

-Motility: Rapid non-directional
- 2 nuclei:
o Kidney shape macronucleus
o Small spherical micronucleus
- 1-2 contractile vacuoles
- Food vacuoles, bacteria
- Cytostome present
- Numerous bristles

27
Q 
morphology of Blastocystis hominis trophozoites
size:
shape:
color:
inclusions:
A

-Size: 5-10um
- Shape: spherical to ameboid
- Color: Refractile but stained with iodine
- Inclusions: large central vacuole with
peripheral nucleus and cytoplasm

protozoans (2 decks)

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