We present the case of a 4.5 years old boy with atypic toxocariasis, from La Matanza, Morropon, Piura. The patient had non-specific symptoms during 9 days. Suspicion of Toxocariasis was supported by marked eosinophilia in the cell blood count (15% or 1470 cells/μL). Diagnosis was confirmed by laboratory with ELISA serology demonstrating the presence of IgG and IgM anti-Toxocara antibodies. Symptoms receded before the patient received a five-day treatment with albendazol 15mg/kg/day.