The adult heart-worms can grow up to 12 inches in length. These adult worms live in the heart, lungs and vessels of dogs, cats and ferrets. They can also be found other mammals such as foxes, wolves, coyotes, sea lions and even humans. Heart-worms cause damage to vital internal organs and their associated vessels leading to heart failure and lung disease as well as liver and kidney damage. Heart-worm disease is most prevalent in warm, humid areas where the mosquito population

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