Rocky Mountain spotted fever

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Rocky Mountain spotted fever is caused by Rickettsia rickettsii, a species of bacteria that is spread to humans by hard ticks (Ixodidae).It was originally called “black measles” because of the characteristic rash that develops after infection.

[edit] Agent and vector

Rickettsia rickettsii, the causative agent of Rocky Mountain spotted fever.

Ixodes ricinus ticks

[edit] Symptoms

Hand and wrist displaying the characteristic spotted rash of Rocky Mountain spotted fever.

Close up of spotted rash.
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