Sera from 455 patients with diagnosed toxocarosis were examined for the presence of specific IgE by the ε-capture ELISA. Total IgE levels were measured in the sera of 174 patients. Specific IgE was found in 54% of cases, with a high level in 30%. Total IgE level was elevated in 67% of patients. A similar pattern was found in patients with ocular and visceral forms of toxocarosis. There was no statistically significant difference in levels of specific IgE between patients with these forms of the disease. However, we observed significantly higher concentrations of specific IgE among patients who showed high specific IgG activity (titre equal to or higher than 1 : 20,000).