Close-up view of intestinal hookworm infestation, representing causes like poor sanitation, walking barefoot on infected soil, or ingesting contaminated substances.

Anatomical 3D image showing multiple hookworms in intestinal walls, illustrating common causes of infection such as contaminated soil or water.
Close-up view of intestinal hookworm infestation, representing causes like poor sanitation, walking barefoot on infected soil, or ingesting contaminated substances.