Changes

==Signalment==

==Signalment==

The risk of Dirofilaria immitis infection is greatest in outdoor dogs and cats. Dogs of any age may be affected, but infections are most common in 3 to 8 year old dogs, and medium and large breeds are over-represented^{merck, fmc}. In cats, there are no breed or age predispositions, but males are more frequently affected^fmc. There are no age predilections in ferrets^merck.

''Dirofilaria immitis'' infection affects dogs more commonly than cats, and risk is greatest in outdoor animals. Dogs of any age may be affected, but infections are most common in 3 to 8 year old dogs, and medium and large breeds are over-represented^{1, 3}. In cats, there are no breed or age predispositions, but males are more frequently affected³. Ferrets may also contract dirofilariasis; there are no age or sex predilections¹.

==Diagnosis==

==Diagnosis==