Introduction
Cats, and especially kittens, are prone to developing respiratory disease. Respiratory diseases often present with the same clinical signs, despite their many different causes. While there are many different types of respiratory diseases in cats, most of them are grouped under the heading of “feline upper respiratory disease complex.” Due the similarity of clinical signs and the difficulty in diagnosing the precise cause of the condition, feline upper respiratory disease complex is a name which is used to identify classic feline respiratory disease symptoms.
Types of Respiratory Disease in Cats
Viral
The most common respiratory diseases in cats are viral. The feline herpesvirus (FHV) and feline calicivirus are the most common causes of feline upper respiratory tract infection. Other viruses can be primarily or secondarily involved.
Bacterial
Bacterial infections are also among the most common causes of feline upper respiratory tract disease. Bordetella bronchiseptica and Chlamydophila felis are the most common bacterial culprits.
Fungal
Respiratory disease in cats can also be caused by fungal infections, particularly by inhalation of the soil-borne fungus, Coccidiodes immitis. This is uncommon in domestic cats.
Allergic
In some cases, allergies can cause or contribute to feline asthma and respiratory disease. Cats can be allergic to a number of environmental and other allergens, including chemicals, ingredients in food, plants, pollen or a number of other things.