Microsporidial keratopathy in two dogs

Area of Science:

• Veterinary Ophthalmology
• Ocular Pathology
• Microbial Keratitis

Background:

• Microsporidia are opportunistic intracellular protozoan parasites.
• Canine keratopathies can have diverse etiologies, including infectious agents.
• Accurate diagnosis is essential for effective treatment of corneal diseases.

Observation:

• Two dogs presented with unilateral stromal keratopathy.
• Clinical signs included multifocal coalescing corneal opacities.
• Histopathology and transmission electron microscopy confirmed Nosema species infection.

Findings:

• Superficial keratectomy was the initial treatment for both dogs.
• One dog experienced local recurrence two years post-surgery.
• Penetrating keratoplasty and antifungal medication were required for the recurrent case.

Implications:

• This study highlights microsporidia as a cause of canine keratopathy.
• Early diagnosis and surgical intervention are important for managing this condition.
• Recurrence is possible, necessitating long-term monitoring and potentially advanced surgical techniques.