DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Tick on scrotum. Close-up of a tick (superfamily Ixodoidea) embedded in the scrotum of a 68-year-old male agricultural worker. Ticks are blood sucking ectoparasite arachnids that can transmit diseases such as Lyme disease in humans and animals.
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