Biologist using a microscope

Credit: SCOTT BAUER/US DEPARTMENT OF AGRICULTURE/SCIENCE PHOTO LIBRARY

Restrictions: EDITORIAL USE ONLY

Caption: Biologist using a microscope to examine leaf litter for black-legged tick (Ixodes sp.) nymphs. Black-legged ticks are external parasites that feed on human blood. They spread Lyme disease, which causes a rash, fever and joint pain.

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Keywords: adult, biological, biologist, biology, black, black-legged, equipment, examining, human, instrument, lab, laboratory, leaf litter, light microscope, male, man, middle-aged, observing, parasitology, pathological, pathology, people, person, research, researcher, researching, science, scientific, scientist, tick, ticks, using

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