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Rocky Mountain spotted fever
1Companion Animal Medical Clinic, Puyallup, WA 98373.
The Veterinary Clinics of North America. Small Animal Practice
|January 1, 1991
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.
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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