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Scabies is a highly contagious—yet highly treatable—parasitic skin disease caused by tiny mites. Often contracted through contact with mite-infested persons, it is most prevalent in crowded, unhygienic areas and has plagued mankind for centuries. Female mites tunnel into the host’s skin to deposit their eggs, triggering a massive allergic reaction that causes intense itching. Scratching the skin causes lesions that may then become infected. Most scabies infestations are caused by how many mites? Discuss
Source: The Free Dictionary