Rocky Mountain wood tick


SEM-Rocky Mountain wood tick (Dermacentor andersoni). Rickettsias, which are germs slightly larger than viruses, causes the disease Rocky Mountain spotted fever. The germ infects the Rocky Mountain wood tick. The ticks become infected when they bite small mammals, such as field mice and dogs, that are infected with the germ. When the tick bites a person, it transfers the rickettsia to that person's bloodstream. Symptoms include chills, fever, rash, severe pains in the leg muscles and the joints. Then a rash develops. Magnification-150x.

Credit: Eye of Science / Science Source

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