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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.
Heartworms are a thread-like parasitic worm that infest your dog's heart and lungs. They are spread by mosquito bites. If your dog's heartworm infestation becomes severe, he could exhibit heavy breathing symptoms. He might also cough, cough up blood phlegm, and retain fluid in his abdomen.