Head louse, SEM

Head louse, SEM

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Credit: STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY

Caption: Head louse. Coloured scanning electron micrograph (SEM) of the head and thorax of a human head louse (Pediculus humanus capitis) clinging to a strand of human hair. It ranges in size from 2 to 3 millimetres in length. Each of its six legs ends in a claw. These claws are used to grasp the shaft of a hair, and as such render the louse unable to jump. An infestation will cause itching due to an allergic reaction to louse saliva, and if not treated can lead to fever & secondary infections. Magnification: x30 at 6x7cm size.

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Keywords: animal, antenna, antennae, claw, claws, coloured, disease causing, hair, head, head louse, human, infection, insect, insecta, invertebrate, invertebrates, leg, legs, lice, nature, nit, nits, parasite, parasitic, pediculus humanus capitis, scanning electron micrograph, sem, strand, thorax, wildlife, zoology

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