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Eosinophilic keratoconjunctivitis in seven horses

M Yamagata1, D A Wilkie, B C Gilger

  • 1Department of Veterinary Clinical Sciences, School of Veterinary Medicine, Ohio State University, Columbus 43210, USA.

Journal of the American Veterinary Medical Association
|October 1, 1996
PubMed
Summary

Eosinophilic keratoconjunctivitis in horses presents with severe eye discharge and corneal ulcers. Topical corticosteroids and antibiotics effectively treated the condition, though treatment duration was lengthy.

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Area of Science:

  • Veterinary Ophthalmology
  • Equine Health

Background:

  • Eosinophilic keratoconjunctivitis is an ocular condition affecting horses.
  • This study reviews cases diagnosed at a specific veterinary teaching hospital.

Purpose of the Study:

  • To describe the clinical presentation, diagnosis, and treatment outcomes of eosinophilic keratoconjunctivitis in horses.
  • To evaluate the efficacy of topical corticosteroid and antibiotic therapy.

Main Methods:

  • Retrospective case review of 7 horses diagnosed with eosinophilic keratoconjunctivitis.
  • Clinical examination, cytologic evaluation of corneal scrapings, and microbial cultures were performed.
  • Treatment involved topical 0.05% dexamethasone and triple antibiotic ointments, with one case treated surgically.

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Main Results:

  • All horses exhibited severe blepharospasm, chemosis, conjunctival hyperemia, epiphora, and mucoid discharge.
  • Cytology revealed numerous eosinophils; cultures were negative for pathogens.
  • Topical treatment led to complete resolution in 5 horses, with a mean treatment duration of 64 days.
  • No secondary infections occurred despite prolonged treatment.

Conclusions:

  • Eosinophilic keratoconjunctivitis in horses is characterized by specific clinical and cytologic findings.
  • Topical corticosteroid and antibiotic therapy is effective but requires prolonged treatment.
  • Superficial keratectomy may offer a faster resolution in some cases.