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Caused by larvae of the dog and cat hookworms, Ancylostoma braziliense and Ancylostoma caninum
Worms migrate through skin; they cannot complete their life cycles so only cause cutaneous disease
May also be caused by other animal hookworms, gnathostomiasis, strongyloidiasis
Infection common in warm areas, including the southeastern United States
Most common in children
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Intensely pruritic erythematous papules develop, usually on the feet or hands
Papules are followed within a few days by serpiginous tracks marking the course of the parasite, which may travel several millimeters per day
Several tracks may be present
The process may continue for weeks, with lesions becoming vesiculated, encrusted, or secondarily infected
Without treatment, the larvae eventually die and are absorbed
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Mild cases do not require treatment
Thiabendazole (10% aqueous suspension) can be applied topically three times daily for 5 or more days
Systemic therapy with albendazole (400 mg orally once or twice daily for 3–5 days) or ivermectin (200 mcg/kg orally single dose) is highly effective