LM of nit (egg case) of human head louse Pediculus

LM of nit (egg case) of human head louse Pediculus

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Caption: Light micrograph of a nit (egg case) containing a developing human head louse Pediculus humanus capitis, attached to a human hair. The vase-like nit has a perforated lid (upper right), which is removed by the emerging nymph. Adult female lice lay between 80-100 eggs in a lifetime. Development to maturity is rapid, with successive generations arising at intervals of about three weeks. The adult lice live within the hair of the head. Infestations of Pediculus humanus capitus cause pediculosis, an intense itching that may progress to bacterial infection. Treatment is with shampoo preparations. Magnification: x25 at 35mm size.

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Keywords: animal, egg, head louse, insect, insecta, invertebrate, invertebrates, lice, light micrograph, louse, nature, nit, pediculus humanus capitis, wildlife, zoology

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