Table 2: Morphology of Trophozites of intestinal Amoebae

Question 1

Entamoeba histolytica

Size (diameter or length)
Motility
No. of nucleus

Answer 1

-10-60um: usual range. 15-20um commensal form- over 20um-invasive form
-Progressive with hyaline, fingerlike pseudopods
- 1

Question 2

Entamoeba hartmanni

Size (diameter or length)
Motility
No. of nucleus

Answer 2

• 5-12um:usual range, 8-10um
• usually non progressive: maybe progressive occasionally
• 1

Question 3

Entamoeba coli

Size (diameter or length)
Motility
No. of nucleus

Answer 3

• 15-50um:usual range, 20-25um
• sluggish, non progressive, with blunt pseudopods
• 1

Question 4

Entamoeba polecki

Size (diameter or length)
Motility
No. of nucleus

Answer 4

• 10-25um:usual range, 15-20um
• Usually sluggish, similar to E.coli;
  occasionally in diarrheic speciments, maybe progressive
• 1

Question 5

Endolimax nana

Size (diameter or length)
Motility
No. of nucleus

Answer 5

• 6-12um:usual range, 8-10um
• Sluggish, usually non-progressive, with blunt psedopods
• 1

Question 6

lodamoeba buetschlii

Size (diameter or length)
Motility
No. of nucleus

Answer 6

• 8-20um:usual range, 12-15um
• Sluggish usually non-progressive
• 1

Question 7

Entamoeba histolytica

Peripheral chromatin
Karyosomal chromatin

Answer 7

• Fine granules:usually evenly distributed and uniform in Size
• Small, discrete: usually centrally located, but occasionally eccentrically located

Question 8

Entamoeba hartmanni

Peripheral chromatin
Karyosomal chromatin

Answer 8

• Similar to E. histolytica
• Small, discrete, often eccentrically located

Question 9

Entamoeba coli

Peripheral chromatin
Karyosomal chromatin

Answer 9

• Coarse granules, irregular in size and
  distribution
• Large, discrete, usually eccentrically located

Question 10

Entamoeba ploecki

Peripheral chromatin
Karyosomal chromatin

Answer 10

• Usually fine granules evenly distributed, occasionally regularly arranged, chromatin sometimes in plaques or crescents
• Small, discrete, eccentrically located:
  occasionally large, diffuse, or
  irregular

Question 11

Endolimax nana

Peripheral chromatin
Karyosomal chromatin

Answer 11

• None
• Large, irregularly shaped, blotlike

Question 12

lodamoeba buetschlii

Peripheral chromatin
Karyosomal chromatin

Answer 12

• none
• Large, usually centrally located, surrounded by refractile, achromatic granules: granules often not distinct even in stained slides

Question 13

Entamoeba histolytica cytoplasm

Appearance
Inclusions

Answer 13

• Finely granular
• Erythrocytes occasionally: noninvasive organisms may contain bacteria

Question 14

Entamoeba hartmanni cytoplasm

Appearance
Inclusions

Answer 14

• finely granular
• bacteria

Question 15

Entamoeba coli cytoplasm

Appearance
Inclusions

Answer 15

• Coarse, often vacuolated
• Bacteria yeasts, other materials

Question 16

Entamoeba ploecki cytoplasm

Appearance
Inclusions

Answer 16

• Coarsely granular, may resemble E.coli; vacuolated
• Bacteria yeasts

Question 17

Endolimax nana cytoplasm

Appearance
Inclusions

Answer 17

• Granular, vacuolated
• Bacteria

Question 18

lodamoeba buetschlii cytoplasm

Appearance
Inclusions

Answer 18

• Coarsely granular, vacuolated
• Bacteria, yeasts, or other material