samples
were also examined by ELISA test (Dahlewitz, Berlin,
Germany). The age, gender, living place and symptoms
of subjects were also recorded. Data were analyzed using
the Statistical Package for the Social Sciences software
program. The Chi-square test was used for assessment of
relation of Giardia infestation and clinical symptoms. P
value less than 0.05 was considered statistically significant.
Statistical kappa agreement rate was used for direct stool
examination and ELISA test agreement rate. A kappa value
of 1 indicates prefect agreement and zero shows that the
agreement is not better than chance.