Abstract
Several parasitic diseases affect the skin and appendages in humans, the most common are head lice and scabies. Both diseases have worldwide distribution with geographical variations. In Chile, the reported prevalence of head lice is 20-25% and of scabies 1-5%. Other ectoparasites include fleas and mite, causing transient parasitosis related to human and animal contact. These parasites are associated with various factors such as poor personal hygiene, promiscuity, long hair, crowding, and sharing of combs, among others. Various effective pharmacological therapies are available, which base on several active compounds. Important therapeutic options include topical treatments with pyrethroids, lindane, crotamiton, and malathion as well as oral medications such as ivermectin, which is used in case of drug intolerance, poor treatment response, infections with multiple parasites or concomitant bacterial infections. For some drugs, resistance has been reported in patients received multiple dosis.
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