Larval stages of Toxocara canis and Toxocara cati, common intestinal roundworms of dogs and cats, respectively, frequently infect humans worldwide. Objectives: to determine the knowledge and practice of dog or cat ownership related to Toxocara infection. Method: 235 patients being suspected of infection at 103 Hospital from September 2012 to March 2013 were questionnaire interviewed their serum samples were tested for antibodies to Toxocara excretorysecretory antigens by ELISA. Results: The percentage of knowing dogs and cats having worms was low (35 percent) and did not differ between positive and negative groups. 77.1 percent of the patients knowing that dogs or cats having nematodes were aware of the ascarids's capacity of causing disease to humans but the difference between the two groups was not significantly. Knowledge of transmission of Toxocara spp. was not associated with the infection. No significant association was observed between ownership of or contacts with dogs or cats and Toxocara infection (OR 0.84 - 1.51) Dogs and cats were locked in chains or cages increased the risk of Toxocara infection (OR = 2.35). Properly or improperly hygiene practices for dogs or cats did not affect the rate of seropositivity (OR = 1.47).
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