A newly discovered bacterium identified in three dogs belongs to the same Rickettsia group as the pathogen that causes Rocky Mountain spotted fever, according to a study in Emerging Infectious Diseases. Genetic analysis showed that one dog each in Illinois, Oklahoma and Tennessee with known tick exposure carried a Rickettsia strain that had 95% similarity to R. rickettsii, and researchers are asking veterinarians to collect ticks from dogs with clinical signs of RMSF when possible to help determine the pathogen's range.
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