(DIAGNOSTIC IMAGING) -- Human toxocariasis, or visceral larva migrans, is a zoonotic disease caused by tissue migration of the nematode larva Toxocara canis, a dog ascaris. The condition involves the liver and lungs producing eosinophilic inflammation. Mature dog ascarid worms, T. canis, live in the small intestine of the wild dog, wolf, dingo, and fox. Eggs produced by these worms are unembryonated when passed in feces, and have a subglubose appearance and a pitted shell. They reach the infective stage in three to four weeks, given favorable moisture and temperature conditions.
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