DR KEITH WHEELER / SCIENCE PHOTO LIBRARY DR KEITH WHEELER / SCIENCE PHOTO LIBRARY
Head louse. Light micrograph of the human head louse (Pediculus humanus capitus). This exoparasite has a large head with two eyes (black) and two small jointed antennae. Head lice lay eggs on the hairs of the head. Symptons are itching and scratching which causes lesions such as impetigo. Magnification: x10 when printed at 10 centimetres tall.
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