Here’s a summary of the most recent and significant diseases affecting cats in the United States, including new outbreaks, emerging threats, and ongoing concerns vets are watching in 2026.
Avian Influenza (Bird Flu) – Highly Pathogenic H5N1
There have been confirmed H5N1 infections in domestic cats, including at least one reported death in Washington state in early 2026 from bird flu.
The case surfaced after a San Francisco pet became ill and was euthanized. Tests tied the virus in the cat to the same virus in bags of RAWR Raw Cat Food Chicken Eats. [Earth.com, Adrian Villellas – FDA issues health alert for raw pet food contaminated with avian influenza]
Feline Infectious Peritonitis (FIP) — Coronavirus-Related
Feline infectious peritonitis, caused by a mutation of feline coronavirus, remains a serious and often fatal disease in cats unless treated appropriately.
Researchers at the University of California, Davis, have uncovered new details about how a once-deadly coronavirus disease in cats spreads through the immune system. The findings may help scientists better understand long COVID and other long-lasting inflammatory illnesses in people. [UCDavis.edu, Amy Quinton, January 12, 2026 – Cat Disease Challenges What Scientists Thought About Coronaviruses – Study Finds Viruses May Hide and Persist in Immune Cells]
Parasitic and Vector-Borne Diseases
Heartworm disease: Cats can be infected by a single mosquito bite. While less common than in dogs, heartworm incidence in cats has been noted, especially in warmer states.
Certain US states saw elevated rates of parasite-borne illnesses in cats and dogs last year, according to 2024 data from the Companion Animal Parasite Council, a nonprofit organization focused on bringing awareness to the risks posed by parasites. Although parasite-related illness rates in dogs and cats varied by state, these organisms affect all states, including during the winter months. [DVM360.com, Abi Bautista-Alejandre, April 3, 2025 – States with the highest cases of parasite-borne diseases in cats and dogs]
Recommended Reading
There’s only one way to become an outstanding success as a salesperson. It’s called repeat and referral sales. It doesn’t matter if you’re selling cars, real estate, insurance, pharmaceuticals, financial services or farm equipment. If you don’t focus your efforts on generating repeat and referral sales, you’re going nowhere as a salesperson. Furthermore, there’s only one way in which you can get your customers to provide you with continuing repeat and referral sales and that’s by turning them into long-term friends. Let me give you an example: Joe Girard was a car salesperson for Merolis Chevrolet in Detroit. For 12 straight years Joe was listed in The Guinness Book of World Records for being the world’s best new car salesperson. During his final year of selling cars, Joe sold 1,425 new Chevrolet cars and trucks! That’s 1,425 new Chevrolet cars and trucks sold by a single salesperson during one calendar year! How did Joe do it? The answer is simple. 65% of his sales were to repeat customers and the other 35% were to customers who were referred to him by his repeat customers. So, the year that Joe Girard got into The Guinness Book of World Records for selling 1,425 cars, how many cars did he actually sell? The answer is NONE! His customers sold them for him. Why? Because Joe took the time to turn each of his customers into a long-term friend. As Joe put it, “I stand in front of my product as well as behind it.” In other words, before you could buy a car from Joe, you first had to buy Joe. He wouldn’t let you buy a car from him until he turned you into a friend. Then, after you bought a car from Joe and you experienced a problem either with the car or someone at the dealership, Joe went to bat for you and personally saw to it that the problem was resolved to your satisfaction. Joe also made it a point to stay in touch with his customers after they bought a car from him; he didn’t forget about them and he made sure they they knew it. Yes, Joe truly loved his customers and they loved him back by providing him with enough repeat and referral sales to make it possible for him to sell more than 13,000 cars in 12 years. As Joe said in his book, How to Sell Anything to Anybody, “All of my customers these days are people who ask for me by name. All of them.” You too can enjoy the same level of success as Joe Girard once you stop focusing on making sales and start focusing on turning your customers into long-term friends.
Recommended Reading
There’s only one way to become an outstanding success as a salesperson. It’s called repeat and referral sales. It doesn’t matter if you’re selling cars, real estate, insurance, pharmaceuticals, financial services or farm equipment. If you don’t focus your efforts on generating repeat and referral sales, you’re going nowhere as a salesperson. Furthermore, there’s only one way in which you can get your customers to provide you with continuing repeat and referral sales and that’s by turning them into long-term friends. Let me give you an example: Joe Girard was a car salesperson for Merolis Chevrolet in Detroit. For 12 straight years Joe was listed in The Guinness Book of World Records for being the world’s best new car salesperson. During his final year of selling cars, Joe sold 1,425 new Chevrolet cars and trucks! That’s 1,425 new Chevrolet cars and trucks sold by a single salesperson during one calendar year! How did Joe do it? The answer is simple. 65% of his sales were to repeat customers and the other 35% were to customers who were referred to him by his repeat customers. So, the year that Joe Girard got into The Guinness Book of World Records for selling 1,425 cars, how many cars did he actually sell? The answer is NONE! His customers sold them for him. Why? Because Joe took the time to turn each of his customers into a long-term friend. As Joe put it, “I stand in front of my product as well as behind it.” In other words, before you could buy a car from Joe, you first had to buy Joe. He wouldn’t let you buy a car from him until he turned you into a friend. Then, after you bought a car from Joe and you experienced a problem either with the car or someone at the dealership, Joe went to bat for you and personally saw to it that the problem was resolved to your satisfaction. Joe also made it a point to stay in touch with his customers after they bought a car from him; he didn’t forget about them and he made sure they they knew it. Yes, Joe truly loved his customers and they loved him back by providing him with enough repeat and referral sales to make it possible for him to sell more than 13,000 cars in 12 years. As Joe said in his book, How to Sell Anything to Anybody, “All of my customers these days are people who ask for me by name. All of them.” You too can enjoy the same level of success as Joe Girard once you stop focusing on making sales and start focusing on turning your customers into long-term friends.
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