| comparable seropositivity for ascariasis and toxocariasis in tropical slum children. | the seropositivities for infection by ascaris lumbricoides and toxocara canis were determined in children (1-15 years old) of a slum area of caracas, venezuela, and the levels that indicate the presence of active infection were defined. in children aged from 1 to 3 years, approximately 10% were positive for either parasite, and this figure increased to about 30% in 4- to 6-year-olds. for toxocariasis, the percentage of positivity remained at this level up to the age of 15 years. whilst the posit ... | 1993 | 8278336 |