Hookworm

A.    B.

Hookworm eggs examined on wet mount (eggs of Ancylostoma duodenale and Necator americanus cannot be distinguished morphologically). Diagnostic characteristics: Size 57-76 µm by 35-47 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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