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• Hook worms skin#

Some of the larvae that are traveling through tissue encyst and stay in the tissue, until the (female) host becomes pregnant. Once in the lungs, they follow the same path as larvae that penetrated the skin. Some of the larvae stay there, and some burrow through the intestinal wall and travel to the lungs through tissues. If the larvae are ingested, they travel directly to the small intestine. Coughing brings the larvae to the mouth, where they are swallowed and travel to the small intestine, attach to the wall, and mature to adulthood. Once in the lungs, they break out of the blood vessels and enter the alveoli, then crawl up the respiratory tree to the trachea, where they cause a mild irritation that makes the host cough.

Hook worms skin#

Larvae that enter the host through minute breaks in the skin migrate to the lungs via the bloodstream. The larvae infect the host either by being ingested or by penetrating the host's skin ( Figure 19). The infective larvae are found in shady, moist, sandy soil. In 1 to 3 weeks they become infective larvae. During the normal life cycle of hookworms, eggs are passed by adult females in dog or cat feces and hatch as larvae on the ground. BERRYHILL PHD, in Handbook of Zoonoses, 2007 TRANSMISSIONĪdult hookworms are found attached to the wall of the small intestine.