Upper respiratory infections are common in kittens and rare in most adult cats. Common infectious organisms include the Bordetella bacterium, feline herpes virus (viral rhinotracheitis), feline calicivirus, mycoplasma, and Chlamydia psittaci.
Infection occurs as a result of contact with the organism, which is present in nasal, eye, and salivary secretions from infected or diseased cats. Common clinical signs include discharge from the eyes and...