Feline Upper Respiratory Infection Fact Sheet
What is Feline Upper Respiratory Infection?
Feline upper respiratory infection, or feline URI as it is commonly known, is a highly contagious disease affecting the nasal passages and sinuses of cats and kittens. It is common in animal shelters, catteries, multiple-cat households, and free-roaming cat populations. Almost all cases of feline URI are caused by infection with one of two viruses: feline herpesvirus (also known as feline rhinotracheitis) and feline calicivirus. These two viruses are "species specific," meaning they infect only cats and kittens, not dogs or humans.