SI ascarid of dogs, ubiq in puppies, few = asymptomatic, lots→wt loss, poor growth, pot belly, Dx, Vx, hepatitis (due to hepatotracheal migration), pneumonia, death. PPP=4-5wks., L2 in embryonated egg infective (can survive<5y). in puppies under 3mo, ingest embryonated eggs/larvae→hepatotracheal migration→++ shedding (starts 2-3wo), spontaneous expulsion~6wo. in adults dogs (or warm blooded non-canids, later eaten) →liver→heart→lungs→heart via bvs→somatic tissues (liver/kidney/mm/etc)→granulomatous reactions, "waiting phase"→ dont develop but still metabolically active, immune evasion...→ vertical transmision by 1) somatic (placental) migration, hypobiotic stages reactivated by hormonal changes towards end of gestation, placenta→ to puppy liver , 2) mammary transmission. or faecal transmission, ingestion of L3.