Clinical, serologic, and epidemiologic characteristics of ocular toxocariasis.

The clinical, serologic, and epidemiologic characteristics of 17 cases of ocular toxocariasis (OT) were studied and compared with those of a control group of 15 cases of other ocular diseases whose differential diagnosis included retinoblastoma. The prevalence and mean titers of Toxocara antibody detected by enzyme-linked immunosorbent assay were greater (P less than 0.005) for patients with OT than for the control group, but not all clinically diagnosed OT cases had detectable antibody. The prevalence of pica was significantly greater in cases than in controls (P less than 0.05). Almost all case and control patients had a history of exposure to pet dogs and cats, but recent exposure to puppies (less than 3 months old) was significantly associated with Toxocara infection in this study group.