Feline herpesvirus-1 (FHV-1) is the causative agent of feline viral rhinotracheitis (FVR), a common cause of upper respiratory tract disease, and considered the most common cause of feline ocular disease1,2; it is highly contagious. Initial infection in kittens leads to severe upper respiratory and ocular disease, often with fever, sneezing, and purulent nasal and ocular discharge. After primary infection, the virus becomes dormant in the trigeminal ganglion, and cats become latent carriers. Stressful events, such as concurrent illness, travel, introduction of a new pet, or immunosuppressive therapy (eg, steroids, chemotherapy), can cause recrudescence of the virus and clinical flare-ups.
Figure 1. Conjunctivitis in a 6-week-old kitten, with adhesions of the conjunctiva caused by fibrinous membranes