Creeping eruption is the name for a rash caused by the movement of hookworm larvae beneath the surface of the skin. The incidence of creeping eruption is most common in warm climates, and more often in children than in adults. Coming into frequent contact with damp sandy soil that is contaminated with cat or dog feces is a major risk factor for developing the condition.

Cats and dogs that are infested with hookworms shed the eggs in their feces. The hookworm eggs hatch and infest the soil around the droppings. When bare skin comes in contact with the soil, the larvae burrow into the skin and begin to migrate, which may lead to severe itching. The path taken by the larvae can often be clearly seen in the form of a snake-like trail that actually moves across the skin. The movement rates may be from a few millimeters to a few centimeters per day. Intense itching along the trail is common, and often more severe at night.

Treatment is not always necessary, as the condition may clear up on its own. If treatment is sought, physicians may administer thiabendazole , albendazole, or ivermectin. These drugs are quite effective.

Wearing shoes outside is one of the best ways to prevent the hookworm infection, as the vast majority of cases involve penetration of the larvae through bare feet. De-worming pet cats and dogs has also lessened occurences of creeping eruption.

See also

• Dermatology
• Intestinal parasite