Feline Upper Respiratory Infection (URI)

Feline Upper Respiratory Infection (URI)

Feline Upper Respiratory Infection (URI)

Overview

Feline upper respiratory infection (URI) is a highly contagious viral and bacterial respiratory condition, often compared to a “common cold” in cats. However, in kittens, seniors, or immunocompromised cats, it can become severe or even life-threatening.

Most cases are caused by feline herpesvirus (FHV-1) or calicivirus, sometimes combined with bacterial infections.

Symptoms

  • Sneezing
  • Nasal discharge (clear to thick)
  • Eye discharge or conjunctivitis
  • Fever
  • Loss of appetite
  • Lethargy
  • Mouth ulcers (calicivirus cases)

Causes & Transmission

  • Direct contact with infected cats
  • Shared bowls, bedding, litter boxes
  • Airborne droplets in shelters or multi-cat homes
  • Stress-induced flare-ups in latent herpesvirus carriers

Treatment

  • Supportive care (most important)
  • Fluids if dehydrated
  • Antibiotics for secondary bacterial infection
  • Antiviral medications (severe herpesvirus cases)
  • Eye ointments if ocular involvement

Prognosis

Most cats recover, but herpesvirus may remain lifelong and flare under stress.

References