| urban contamination with zoonotic parasites in the central region of argentina. | adult worms develop in dogs and their eggs are shed in the feces. non-embryonated eggs of toxocara canis become infectious after about 2-6 weeks in the soil and the likelihood of their transmission to humans is through ingestion. in 2004 studies were carried out in the areas of urban recreation in the central region of argentina. a total of 393 dog excrement samples were collected in eight different cities: 59.3 per cent were positive for parasites. these areas of urban recreation are contaminat ... | 2008 | 18977705 |