| toxocara canis infestation. clinical and epidemiological associations with seropositivity in kindergarten children. | we studied a cohort of 333 children in kindergarten to determine the prevalence of seropositivity to toxocara canis, and to detect and measure chronic health effects that might be attributable to past infection. we found that 23.1% of the children had serologic evidence of infection (antibody titer greater than or equal to 1:32), assayed by means of an enzyme-linked immunosorbent assay. black children were more frequently infested than white children, as were children of parents who did not grad ... | 1986 | 3763150 |