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The lungworm infection in dogs affects the respiratory system and may be fatal. The infection is parasitic and may be caused by a number of worms such as Paragonimus kellicotti, Capillaria aerophilis, Osleri osleri or the Filaroides.The infection can be contracted from hosts that carry the parasites.he lungworm infection in dogs affects the respiratory system and may be fatal. The infection is parasitic and may be caused by a number of worms such as Paragonimus kellicotti, Capillaria aerophilis, Osleri osleri or the Filaroides.
Roundworms (Toxocara canis) are common intestinal nematode parasites of dogs. The parasite is extremely common in puppies; however, a strong immunity begins to develop in most dogs by 2-3 months of age. Consequently, in well-cared-for pet dogs that have been dewormed as young puppies, infection is uncommon.