ABSTRACT
To determine the seroprevalence of Toxocara in children having chronic cough. It is a cross sectional study conducted at Ahwaz a city southwest Iran, from Sep 2006 to Dec 2006. Analyses were based on 115 children [randomized cluster sampling] with chronic cough [cough with duration of 2 weeks or more]. Laboratory exams; CBC, eosinophils absolute count and tests for intestinal parasites were performed. Eosinophils <500/mm3 were considered as eosinophilia. IgG anti-toxocara antibodies test was carried out by ELISA method for eosinophitic child. Out of total 115 children 29 [25.2] were eosinophilic, among them 10 [34.48%] hypereosinophilic and 40 [34.78%] had intestinal parasites. Frequency of Toxocara-IgG in chronic cough, eosinophilic and hypereosinophilic was 13.9%, 55.2% and 80% respectively. Chronic cough associated eosinophilia among children in Ahwaz may be contributing to Toxocara infection