Emergence of head louse from nit

Emergence of head louse from nit

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Credit: J.C. REVY, ISM/SCIENCE PHOTO LIBRARY

Caption: Light micrograph of the emergence of a young human head louse, Pediculus humanus capitis, from its egg case (nit) attached to a human hair. The vase- like nit is capped by a lid, which is perforated to allow air to reach the developing nymph within. An adult female lays 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. A close relative, the body louse, P. humanus corporis, inhabits clothing. Infestations of both subspecies cause pediculosis, an intense itching that may progress to bacterial infection. Magnification: x22.5 at 35mm size.

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Keywords: animal, birth, emergence, head louse, insect, insecta, invertebrate, invertebrates, nature, nit, pediculosis, pediculus humanus capitis, wildlife, zoology

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