Equis ISSN 2398-2977

Conjunctivitis: viral

Contributor(s): Dennis E Brooks, Graham Munroe

Introduction

  • Cause: usually associated with systemic disease: either Equine Viral Arteritis (EVA)   Equine viral arteritis (EVA)  or upper respiratory tract (URT) infections eg adenovirus   Equine adenovirus infection (EAI)  , equine herpes virus   Respiratory: EHV infection  .
  • Signs: typical clinical signs of conjunctivitis ; usually bilateral; concurrent signs of systemic disease may be present; secondary bacterial conjunctivitis is common   Conjunctivitis: bacterial  .
  • Diagnosis: failure to respond to standard conjunctivitis treatment; virus isolation or conjunctival scraping with inclusion bodies.
  • Treatment: specific antiviral topical ointments in non-self-resolving cases.
  • Prognosis: good - self-limiting in most cases within 7-10 days.

Pathogenesis

Etiology

Pathophysiology

Timecourse

  • Outbreaks of contagious conjunctivitis may spread rapidly with incubation periods of 2-3 days and a clinical course of 5-10 days.
  • Some horses are left with a chronic conjunctivitis lasting several weeks.

Diagnosis

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Treatment

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Prevention

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Outcomes

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Further Reading

Publications


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