Prevalencia de hallazgo de huevos de toxocara canis en plazas de la Región Metropolitana de la ciudad de Santiago de Chile / Prevalence of toxocara canis eggs in squares of the metropolitan region of Santiago de Chile

In order to stablish the current prevalence by eggs of Toxocara canis, 110 squares of five zones of the Metropolitan Region of Santiago city were examined by a flotation in saturated zinc solution modified method. Samples were taken from different kinds of soil in the four seasons of the year and they were preserved under anaerobic conditions over 2 years. 18,2 percent of samples resulted positive to Toxara canis eggs and 24,4 percent were positive to nematodes larvae. No viable eggs were found. Western zone is the most contaminated of the city and autumn is the season in which we obtained higher recovery of eggs. Silty clay sample soil seems to be better than sandy soils on maintenance of studied eggs