Survey: Cat, Dog Heartworm Cases on the Rise

American Heartworm Society works with vets to raise awareness among pet parents.

Posted: April 7, 2009, 3 a.m. EDT

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Persian cat
Heartworm disease is most prevalent in the Southeastern portion of the U.S., though it appears to be spreading in the Northwest.
Cases of heartworm disease are on the rise across the United States, according to a new survey by the American Heartworm Society.

When compared to historical data, the survey, which is conducted on a tri-annual basis, demonstrates that the number of heartworm cases is gradually rising.

Heartworm disease, potentially fatal to cats and dogs, has been reported in all 50 states. However, the Delta, South-Central and Southeast regions of the United States have the greatest incidence, with prevalence highest in the Delta region. In many counties and parishes in this region, the survey found that there were 100 or more cases reported per clinic.

The survey results are consistent with the geographical spread of heartworm disease, particularly in the Northwest United States, according to AHS. This is especially apparent in Oregon and Montana.
AHS is working with the veterinarian community to raise awareness among consumers and provide guidance on prevention and treatment.

For example, AHS has an educational outreach program called Heartworm University. AHS is also developing canine and feline heartworm guidelines, providing incidence maps to veterinarians, offering client education materials, and providing the latest information and opinions on heartworm disease.

In addition, AHS will present its latest findings at the Heartworm Symposium April 15-18, 2010, in Memphis, Tenn.

Major survey sponsors included Bayer Animal Health of Shawnee, Kan., Fort Dodge Animal Health of Overland Park, Kan., Idexx Laboratories of Westbrook, Maine, Intervet/Schering-Plough Animal Health of Kenilworth, N.J., Lilly of Indianapolis, Merial of Duluth, Ga., Novartis Animal Health of Greensboro, N.C., and Pfizer of New York. Virbac Animal Health of Fort Worth, Texas, was a minor sponsor. Banfield, The Pet Hospital of Portland, Ore., and Idexx provided additional data support.

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Reader Comments

Julie    Seattle, WA

4/10/2009 5:27:39 PM

I was curious about info because one of the vets we go to really thinks all of our dogs should be treated to prevent heartworm here in Seattle. I read an older article that said it is still very rare in the northwest. I'm not sure if I should seriously consider it or skip it for our dogs.

me    me, ME

4/7/2009 11:46:19 PM

Good info

momo    anaheim, CA

4/7/2009 10:07:07 PM

good article

ann    madison, CT

4/7/2009 8:35:38 PM

thanks for the good info

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