Southeast U.S. "hotbed" for heartworms, warns AHSApril 11, 2023An influx of heartworm-positive dogs across the U.S. and a general lack of prevention compliance are the driving factors behind the uptick in heartworm cases. This is according to the American Heartworm Society (AHS). The group has unveiled its 2022 Heartworm Incidence Map, drawn from data provided by thousands of veterinary practices and shelters across the U.S. The numbers show the locales with highest heartworm incidence continue to be those in and adjacent to the lower Mississippi Delta, AHS reports. These areas typically experience conditions fostering widespread heartworm infection, including, among other factors, a mosquito-heavy climate. "The states with the highest density of diagnosed heartworm cases in the latest survey were Mississippi, Louisiana, Texas, Alabama, and Arkansas," says AHS president Jennifer Rizzo, DVM. "Meanwhile, Arkansas, Mississippi, Texas, Georgia, Florida, Tennessee, and the Carolinas all saw expansions of high-density areas on our incidence map." Additionally, the report shows "unexpected increases" in incidence for states with historically low heartworm rates, including Washington, Oregon, Kansas, North Dakota, Massachusetts, and Connecticut. These areas also saw the development of new "hot spot" areas within their borders. Further, several urban cities (including Seattle, Wash., and Boise, Idaho, in the Northwest; Bismarck, N.D., in …
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