Intestinal Hookworm Life Cycle

1) Eggs in feces

2) Rhabditiform larva hatches

3) Development to filariform larva in environment

4) Filariform larva penetrates skin

5) Adults in small intestine

Larvae exit circulation in the lungs; they are then coughed up and swallowed.

Ancylostoma spp. larvae can developmentally arrested and dormant in tissues. Re-activated larvae may enter the small intestine.



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