Sarcoptes scabiei (human itch mite)

Sarcoptes scabiei is a microscopic ectoparasitic mite responsible for human scabies. The female mite burrows into the stratum corneum of human skin where she lays eggs; this process triggers intense itching due to a hypersensitivity reaction. The life cycle includes egg, larva, nymph, and adult stages entirely within the host’s epidermis. Scabies spreads primarily through prolonged direct skin-to-skin contact but can also be transmitted by contaminated clothing or bedding. Crusted (“Norwegian”) scabies represents a severe form with massive numbers of mites seen especially in immunocompromised individuals; it is highly contagious and difficult to treat due to thick crusts protecting mites from topical therapies[1][2][3][4][5]. **Note:** The entry "Scabies mite and other ectoparasites causing cutaneous infestation/scabies etc." is not a canonical molecular target but rather refers collectively to parasitic organisms—primarily Sarcoptes scabiei—that cause cutaneous infestations like scabies. It does not represent a single molecule/receptor/enzyme/transporter suitable for drug targeting classification; instead it describes an organismal pathogen group[2].

Other names

Scabies miteHuman itch miteSarcoptes scabiei var. hominis

Permethrin and other topical agents act as neurotoxins to the mites, disrupting sodium channel function and causing paralysis and death. Ivermectin is an oral antiparasitic that binds to glutamate-gated chloride channels in the nerve and muscle cells of the parasite, leading to paralysis and death[4][5].