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Hookworm
[Ancylostoma duodenale]
[Necator americanus]
Hookworm egg Hookworm egg
A B

A, B: Hookworm eggs examined on wet mount (eggs of Ancylostoma duodenale and Necator americanus cannot be distinguished morphologically).  Diagnostic characteristics:

  • Size 57 to 76 µm by 35 to 47 µm
  • Oval or ellipsoidal shape
  • Thin shell

The embryo in B has begun cellular division and is at an early (gastrula) developmental stage.

 

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