Calici virus infection has many similarities to rhinotracheitis. Cats become infected by inhaling or swallowing the virus, and signs of illness develop within 2 to 10 days of exposure. Early signs include runny eyes and nose, sneezing, depression, and poor appetite. Ulcers may develop on the tongue and hard palate, and most infected cats drool heavily. Illness lasts from 1 to 4 weeks.
Most cats recover, but fatalities do occur.
Young kittens are most likely to be severely affected. Some cats that recover from the disease may continue to shed the virus for weeks or even years. The virus is hardy and can survive outside the cat on dishes and pans for 8 to 10 days. The virus is not transmissible to humans or dogs. Treatment Mildly to moderately affected cats are treated at home with good nursing care.