- Infective stage to human
- Found in faecal specimens of infected human
- Eggs not infective when passed; require development in soil for a few weeks
Diagnostic Features
- Size: 54 µm x 22 µm (range: 49-65 µm x 20-29 µm)
- Shape: Lemon or barrel shaped
- Thick-shelled and yellow brown in colour
- Colourless opercular plugs at each end
- Has an unsegmented ovum
