Heartworm

• dirofilaria immitis
• florida
• mosquitoes
• dogs, cats, and ferrets
• adult right ventricle and pulmonary artery and microfilaria circulatory system

dogs-lethargy, dry cough, exercise intolerance

cats-may not show signs

knott's test, direct smear, Hematocrit method, filtration method, and occult heartworm test (snap test)

Immiticide,

• D. reconditium - straight (glides)
• D. immitis - spiral, long, tapered head