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Flagellates
Dientamoeba fragilis (trophozoite) |
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| Shape | Ameboid shape |
| Motility | Sluggish |
| Nucleus |
1 or 2.4% of D. fragilis only have one nucleus, but this is usually fragmented Karyosome usually in form of cluster of 4-8 granules |
| Cytoplasm | Finely granular |
| Pathogenic | YES |
Trichomonas vaginalis (trophozoite) |
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| Shape | Pear-shaped |
| Motility | Rapid, jerking |
| Nucleus | 1 nuclei |
| Flagella |
3-5 anterior, 1 posterior Undulating membrane extends half length of body; seen in vaginal smears and urethral charges |
| Pathogenic | YES |
Giardia lamblia (trophozoite) |
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| Shape | Pear-shaped |
| Motility | "Falling Leaf" |
| Nucleus | 2 nuclei |
| Axostyle | Structure down the middle |
| Flagella |
4 lateral, 2 ventral, and 2 caudal Sucking disk occupies 50-75% of body |
| Pathogenic | YES |
Giardia lamblia (cyst) |
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| Shape | Oval or Ellipsoid |
| Nuclei | Usually 4, located at one end |
| Fibrils & Flagella | Oriented longitudinally in cyst |
| Pathogenic | YES |