| prevalence of toxocara ova in some schools and public grounds in northern and central jordan. | two hundred and twenty-six soil samples were collected from school playgrounds and public places in four cities and 17 villages in northern and central jordan. toxacara eggs were found in 35 (15.45%) of the samples. viable eggs were found in 18 samples, with viability ranging from 20 to 78%, and among these 18 samples the mean number of viable eggs per 5 g soil was 5.5 +/- 4.58 s.d. (range one to 15 eggs). nine of 94 samples collected from public places and five of 86 samples collected from scho ... | 1989 | 2596905 |