Introduction to Diagnostic Medical Parasitology

• Diseases
• Parasites
• Methods
• Virtual Microscope
• Diagnostics Keys

2 nuclei cyst

2 nuclei cyst
Size: 15 - 30 μm

• Immature cyst with 2 nuclei
• Typically located on opposite sides
• Only one nuclei in focus
• Most commen stage seen in stool specimen
• 1 and 4 nuclei cysts rarely seen

8 nuclei cyst

8 nuclei cyst
Size: 15 - 30 μm

• Mature cyst
• Nuclei not always all visible and sometimes centrally gathered

Vegetative form

Vegetative form
Size: 15 - 50 μm

• Larger and structures more prominent than in E. histolytica
• Difficult to differentiate from E. histolytica.