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Equine ehrlichiosis

J E Madigan1

  • 1Department of Medicine, University of California, Davis, School of Veterinary Medicine.

The Veterinary Clinics of North America. Equine Practice
|August 1, 1993
PubMed
Summary
This summary is machine-generated.

Equine ehrlichiosis, a seasonal horse disease, presents with fever and edema. Diagnosis involves blood smear morulae, and tetracycline treatment effectively resolves symptoms.

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Area of Science:

  • Veterinary Medicine
  • Equine Infectious Diseases
  • Hematology

Background:

  • Equine ehrlichiosis is a recognized seasonal disease in horses, first identified in 1969.
  • The disease manifests with a range of clinical signs including fever, depression, and edema.
  • Hematological alterations such as leukopenia, thrombocytopenia, and anemia are characteristic findings.

Purpose of the Study:

  • To describe the clinical presentation and diagnostic methods for equine ehrlichiosis.
  • To outline the typical hematological changes associated with the disease.
  • To report on the efficacy of tetracycline treatment.

Main Methods:

  • Clinical observation of affected horses.
  • Hematological analysis of blood smears.

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  • Microscopic examination for morulae using Wright's stain.

    • Main Results:

    • Characteristic clinical signs include fever, depression, anorexia, limb edema, petechiae, icterus, and ataxia.
    • Hematologic findings include leukopenia, thrombocytopenia, icterus, anemia, and intracytoplasmic morulae in neutrophils and eosinophils.
    • Tetracycline administration resulted in rapid fever reduction and progressive clinical improvement.

    Conclusions:

    • Diagnosis of equine ehrlichiosis is achievable through clinical signs and identification of morulae in blood smears.
    • Prompt treatment with tetracycline is effective in managing the clinical signs of equine ehrlichiosis.
    • Mortality is generally low, but complications can arise from secondary infections or injuries.