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*Chiggers spread scrub typhus, fleas spread murine typhus, and body lice spread epidemic typhus. | *Chiggers spread scrub typhus, fleas spread murine typhus, and body lice spread epidemic typhus. | ||
*The most common symptoms are fever, headaches, and sometimes rash. | *The most common symptoms are fever, headaches, and sometimes rash. | ||
==Pathophysiology== | |||
*Scratching a louse-bite site allows the rickettsia-laden excrement to be inoculated into the bite wound. | |||
*The rickettsia travel to the bloodstream, and rickettsemia develops. | |||
*The major pathology is caused by a vasculitis and its complications. | |||
Revision as of 18:45, 24 March 2017
Typhus fever
- Typhus is defined as a group of diseases caused by bacteria that are spread to humans by fleas, lice, and chiggers.
- Typhus fevers include scrub typhus, murine typhus, and epidemic typhus.
- Chiggers spread scrub typhus, fleas spread murine typhus, and body lice spread epidemic typhus.
- The most common symptoms are fever, headaches, and sometimes rash.
Pathophysiology
- Scratching a louse-bite site allows the rickettsia-laden excrement to be inoculated into the bite wound.
- The rickettsia travel to the bloodstream, and rickettsemia develops.
- The major pathology is caused by a vasculitis and its complications.