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Heartworm disease is a parasitic infection that can affect any dog regardless of age, sex or habitat. Heartworm disease is found in virtually all parts of the United States and many parts of Canada. Heartworms are spread by mosquitoes. The disease tends to have a higher incidence in areas heavily populated by mosquitoes.
Heartworms live in the blood of a dog's heart and adjacent blood vessels. They can grow from four to twelve inches in length, reach maturation one year after infection and live for approximately five to seven years. Adult heartworms produce offspring, known as microfilariae, which circulate in the animal's blood. When a female mosquito bites an infected animal, it sucks blood containing the microfilariae. When the mosquito bites another pet, the infected larvae are transmitted. In many cases the infected dog will not show symptoms in the early stages of the disease process.
Heartworms are the most serious common parasite for dogs because they stress the dog's heart by restricting blood flow and also damage other internal organs. The heart may enlarge and become weakened due to an increased workload, and congestive heart failure may occur. Left untreated, the disease can be fatal to dogs.
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Blood screening tests can verify the presence of heartworms. Radiographs and x-rays are used to detect the disease in its later stages. Prompt detection prevents needless suffering.
The good news is that most dogs with heartworm disease can be successfully treated, usually with drugs that kill adult heartworms and their offspring. But prevention is the best cure - it's safer, less expensive, and better for your pet!
Preventative medications are extremely effective and when given properly, on a regular basis, can prevent your pet from contracting heartworm disease. But remember, year-round heartworm protection is as good as your diligence in remembering to give your pet the prescribed medication, as directed by Dr. Clark!
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