Parasitology

• Detected in faecal specimens of infected human
• Eggs embryonated when passed
• Egg infective to human or to intermediate host – arthropods

Diagnostic Features

• Size: 47 µm x 37 µm (range:40-60 µm x 30-50 µm)
• Shape: Oval
• Colourless
• Shell has 2 membranes: an outer membrane and an inner membrane 
• No thick striated embryophore like in Taenia eggs
• Two polar thickenings on inner membrane that has 4-8 polar filaments
• Contains a 6-hooked oncosphere inside shell