PROTOZOA (Morphological Characteristics) PART 1

Entamoeba histolytica (Cystic Stage)

Chromatoidal body -“Cigar” shaped bodies

Entamoeba histolytica (Cystic Stage)

Number of nuclei:

• 1 in early stages, 4 when mature

Entamoeba histolytica (Cystic Stage)

Pathognomonic/ diagnostic feature:

• “Ring and dot” nucleus

Entamoeba histolytica (Cystic Stage)

Pathogenic and invasive motility

Entamoeba histolytica (Trophozoite)

Broad or finger-like

Entamoeba histolytica (Trophozoite)

Thrust out quickly

Entamoeba histolytica (Trophozoite)

Pseudopodium first formed with hyaline ectoplasm

Entamoeba histolytica (Trophozoite)

Central and bull’s eye appearance

Entamoeba histolytica (Trophozoite)

Progressive and directional

Entamoeba coli (Trophozoite)

Blunt pseudopods

Entamoeba coli (Trophozoite)

Sluggish, non-progressive motility

Entamoeba coli (Trophozoite)

Blunt pseudopodia

Entamoeba coli (Trophozoite)

Nucleus consist of large

Entamoeba coli (Trophozoite)

Eccentrict karyosome

Entamoeba coli (Cystic Stage)

A thick cell wall surrounds the round to spherical cyst

Entamoeba coli (Cystic Stage)

Have 4 or more nuclei. It has 8 nuclei in mature cyst.

Entamoeba coli (Cystic Stage)

Thin chromatid bars with pointed to splintered ends in young cyst.

Entamoeba coli (Cystic Stage)

Splintered and Broom stick chromatoidal bodies

Entamoeba coli (Cystic Stage)

10-33 microliter in size

Entamoeba gingivalis (Trophozoites)

The only amoeba spp. that ingest WBC

Entamoeba gingivalis (Trophozoite)

Has central and distinct karyosome

Entamoeba gingivalis (Trophozoites)

10-20 um inhabits in the mouth

Entamoeba gingivalis (Trophozoites)

Numerous pseudopodia

Entamoeba gingivalis (Trophozoites)

Digest WBC

Iodamoeba butschlii (Trophozoite)

6-20 micrometers

Iodamoeba butschlii (Trophozoite)

Karyosome may be centrally located

Iodamoeba butschlii (Trophozoite)

Pseudophodia may appear blunt and clear

Iodamoeba butschlii (Trophozoite)

Slugish and non-directional in motility

Iodamoeba butschlii (Cystic Stage)

5-18 micrometers in size

Iodamoeba butschlii (Cystic Stage)

It is consist of one nucleus

Iodamoeba butschlii (Cystic Stage)

It doesn’t have chromatoidal bodies but with large glycogen mass.

Iodamoeba butschlii (Cystic Stage)

Oval shaped in nucleus

Iodamoeba butschlii (Cystic Stage)

With nuclear endosome

Endolimax nana (Trophozoite)

6-15 um in size

Endolimax nana (Trophozoite)

Karyosome: Irregular and blot-like

Endolimax nana (Trophozoite)

Motility: Sluggish and progressive

Endolimax nana (Trophozoite)

Inclusions: Bacterial debris and food vacuole

Endolimax nana (Cystic Stage)

Nuclei: 4

Endolimax nana (Cystic Stage)

Chromatoidal bodies: Small and spherical “cross-eyed cyst”

Endolimax nana (Cystic Stage)

Quadrinucleated

Endolimax nana (Cystic Stage)

Distinct Karyosome