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Overview of Canine Lungworms. Lungworms are a type of parasite that can infect the respiratory tract in dogs. There are several different parasites that have been identified including: Paragonimus kellicotti, Capillaria aerophilia, Filaroides and Osleri spp.verview of Canine Lungworms. Lungworms are a type of parasite that can infect the respiratory tract in dogs. There are several different parasites that have been identified including: Paragonimus kellicotti, Capillaria aerophilia, Filaroides and Osleri spp.
Heartworm disease may lead to blood clots in arteries of the lungs. Blood clots in the pulmonary artery most commonly produce difficulty breathing and an increased breathing rate. Affected dogs often seem normal until they have a sudden onset of respiratory distress.