POWER AND SYRED / SCIENCE PHOTO LIBRARY POWER AND SYRED / SCIENCE PHOTO LIBRARY
Common sheep tick (Ixodes ricinus) on hair, coloured scanning electron micrograph (SEM). The common sheep tick is an arachnid, and has eight legs. It feeds on blood by piercing the skin of its host with its mouthparts. It is the principal vector of Lyme disease in Europe. Symptoms such as stiff muscles and joints, tiredness, fever, and lack of appetite, can cause sudden collapse. Magnification: x30 when printed at 10 centimetres wide.
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