Microscopy - Hookworms

   Necator americanus                            Ancylostoma duodenale
Necator americanus buccal capsule
Anterior: Note the ventral teeth in the buccal capsule of A. duodenaleN. americanus has ventral cutting plates. Ancylostoma duodenale buccal capsule
Necator americanus male copulatory bursa
Male Posterior:
The copulatory bursa is used by the males for grasping the female during mating.  Females lack a copulatory bursa.
Ancylostoma duodenale male copulatory bursa
 Hookworm adults
Adults:  Adults are about 12 mm in length with the males (bottom) smaller than females.
Hookworm eggs
Egg: Eggs cannot be separated morphologically between these two species.  They are about 40 x 70 um with a thin shell, and are undeveloped.

Help / Information
Return to the Hookworm Life Cycle PageZOL 316 Parasitology Online
1999 - All rights reserved.  Produced by Brian E. Keas.