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Rocky Mountain spotted fever.

K M Comer1

  • 1Companion Animal Medical Clinic, Puyallup, WA 98373.

The Veterinary Clinics of North America. Small Animal Practice
|January 1, 1991
PubMed
Summary

Rocky Mountain spotted fever is a tickborne illness transmitted by Dermacentor ticks. Early diagnosis and treatment with antibiotics like tetracycline are crucial for recovery.

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Area of Science:

  • Veterinary Medicine
  • Infectious Diseases
  • Epidemiology

Background:

  • Rocky Mountain spotted fever (RMSF) is an endemic tickborne disease prevalent in the United States and globally.
  • The disease is transmitted through Ixodid ticks, primarily Dermacentor variabilis and Dermacentor andersoni, with small mammals serving as natural reservoirs.
  • Dogs can contract RMSF from infected ticks but do not act as reservoirs for transmission.

Purpose of the Study:

  • To summarize the epidemiology, clinical presentation, diagnosis, treatment, and prevention of Rocky Mountain spotted fever in dogs.
  • To highlight the role of dogs as sentinels for RMSF presence in the environment.

Main Methods:

  • Review of existing literature on RMSF, focusing on tick vectors, reservoirs, and canine infection.
  • Analysis of clinical signs, diagnostic methods (serology, thrombocytopenia), and effective antibiotic treatments (tetracycline, chloramphenicol).

Main Results:

  • RMSF can range from subclinical to fatal multiorgan collapse.
  • Thrombocytopenia is a characteristic laboratory finding, but serologic testing is essential for definitive diagnosis.
  • Antibiotic therapy with tetracycline or chloramphenicol for 14–21 days is effective.

Conclusions:

  • Prompt diagnosis and a full course of antibiotic treatment are vital for successful outcomes in canine RMSF.
  • Preventative measures include avoiding tick-infested areas and prompt tick removal.

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