Symptoms of feline upper respiratory infection includes SNEEZING, NASAL DISCHARGE, RUNNY EYES, and COUGH. To some extent, the combinations of symptoms and course of infection is determined by which of numerous infectious agents is responsible. Ninety percent of feline upper respiratory infections are caused by either feline Herpes or feline Calicivirus. Neither of these infections is transmissible to humans or to other animals.
Most feline colds run a course of 7 to10 days regardless of treatment but it is important to realize that these infections are permanent and that Herpesvirus infections are recurring (a property of all types of Herpes infections). In kittens Herpes infections are notorious for dragging out. Stresses such as surgery (usually neutering/spaying or declawing), boarding, or introduction of a new feline companion commonly induce a fresh Herpes upper respiratory episode. These episodes may recur for the life of the cat though as the cat matures, symptoms become less and less severe and ultimately may not be noticeable to the owner. A cat with Herpes is contagious to other cats for a couple of weeks after a stressful event. Cats infected with Calici are contagious for several months after infection but do not appear to have recurrences the same way cats with Herpes do.


