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Table of Contents > Helminths > Intestinal Nematodes > Ascaris lumbricoides > A.lumbricoides artifacts

Ascaris lumbricoides morphology


72 - Ascaris lumbricoides fertile egg - Phase contrast microscopy

Characteristic fertile egg

  • bile stained
  • mammillated
  • thick external layer
  • unembryonated
  • measures 55-75 mm by 35-50 mm
31 - Ascaris infertile egg

Characteristic infertile egg

  • elongated and larger than fertile egg
  • thin shelled
  • shell ranges from irregular mammillations to a relatively smooth layer completely lacking mammillations
  • internal contents are a mass of disorganized, highly refractive granules
  • measures between 85-95 mm by 43-47 mm

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