alexa Typhus fever | United States| PDF | PPT| Case Reports | Symptoms | Treatment

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Typhus Fever

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  • Typhus fever

     Typhus results from infection by Rickettsia prowazekii a Gram negative, obligate intracellular bacterium. At least two strains can be distinguished by genetic analysis. One strain is found only in humans the other also occurs in flying squirrels in the United States.In scrub typhus, an eschar approximately 5 to 20 mm in diameter is formed at the site bitten by trombiculid mites, and this may be considered the most important clinical finding for the diagnosis of scrub typhus. The site bitten by chiggers is initially a papule followed by a blistered ulcer, and this is then covered with a black crust; the border of the eschar is surrounded by reddish erythema.


  • Typhus fever

    In the United States about 10,482 cases of Typhus fever are reported in each year. Almost 14% of the United States population is suffering with Typhus fever, a disease caused by bacteria called Rickettsia typhi or bacteria called Rickettsia felis.

    Antibiotics are generally only used for treatment of symptomatic typhus infections. Antibiotics should not routinely be used as prophylaxis but may be occasionally recommended for use by people at high risk of exposure, such as those working in endemic areas (eg soldiers at risk of scrub typhus may be prescribed doxycycline prophylaxis).

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