Heartworm incidence nationwide
Map © American Heartworm Society: This map shows heartworm incidence based on the average number of cases per reporting clinic. Some remote regions of the United States lack veterinary clinics; therefore, there are no reported cases from these areas.
It’s important to protect your dog year-round
You love doing everything with your dog, so make sure you’re always ready for your next adventure with year-round heartworm protection. The Companion Animal Parasite Council and the American Heartworm Society recommend year-round treatment with a broad-spectrum parasite control product without interruption, regardless of where you live.1,2
Why your dog needs a year-round heartworm disease preventative
Don’t assume that cold winter weather eliminates the threat of heartworm disease. Starting and stopping medication based on seasonality can cause gaps in your dog’s protection and leave them vulnerable to infection. But you can reduce this risk by protecting your dog from heartworm disease year-round.
However, if your dog has less than year-round protection, it’s important to administer Interceptor Plus for at least six months after your dog’s last exposure to mosquitoes. It can take up to six months or longer for the signs of heartworm infection to manifest in your dog, and some dogs may display no signs at all. So talk to your veterinarian about administering Interceptor Plus monthly all year long — even in winter or other times you don’t see mosquitoes.