Ascaris lumbricoides – Unfertilized Egg

  • Not infective to human
  • Detected in faecal specimens of infected human
Diagnostic Features
  • Size: 90 µm x 40 µm. Range, 85-95 µm x 35-45 µm – larger than fertilised egg
  • Shape: Elongated
  • Colour: Brown
  • Mammillated covering absent or less prominent
  • Shell is often very thin
  • Filled with an irregular mass of protoplasm
Magnification X40