03/05/2026
A rescue reached out about a virulent strain of Calicivirus popping up in Western Washington. It is not like typical Calicivirus. Vaccinated cats are still at risk of dying.
The order of the symptoms are:
Poor Appetite (likely due to sores in the mouth/throat)
Audible pharyngeal congestion (hoarse meow, difficulty swallowing, coughing)
Sometimes tongue ulcers are visible
PCRs are coming back positive for Calicivirus. Some cats are so sick that they are requiring feeding tubes.
The cats being hit the hardest are the seniors and cats that are stressed. Even with cats that have been vaccinated with FVRCP, are still turning out to be fatal. The cats that have passed went into respiratory distress despite vet treatment. 😢
The virus can present like URI (it looks very similar) but then it goes downhill from there.
Be aware. Take precautions. Practice good biosecurity.
Remember that Calicivirus is airborne. It can also spread by direct contact with food bowls/blankets/toys/ect. While you should always wash your hands and wear gloves while handling sick cats. If a cat that is positive Calicivirus and is sharing air with other cats... all cats will all get it.
OFS dealt with Calicivirus in the summer of 2024. It was brutal but nothing like some of the rescues are seeing up north - Intake mindfully, know your limits and have plans in place if you have sick cats entering your rescue