| prevalence of toxocara eggs in sandpits in tokushima city and its outskirts. | to demonstrate the prevalence of toxocara eggs in sandpits in tokushima prefecture, japan, sand samples were examined. of 46 sandpits surveyed, 29 sandpits (63.3%) had toxocara eggs. sandpits in public parks and playgrounds in residential areas were more contaminated (87.5%) with the eggs than those in kindergartens, schools, and children's centers (36.4%). to examine the seasonal change in the contamination, sand samples obtained from five sandpits were examined monthly from may 1990 to april 1 ... | 1993 | 8286535 |