Objective   To control the quality of seroepidemiological survey in the national sur vey of current situation of major human parasitic diseases in China and accumulate experiences for further improving the quality control level and efficiency in serological tests for future investigations.

  Methods   Fish-bone chart method was used to study on control the quality for this survey.

  Results   To analyse the possible quality problems by fish-bone chart method then adopt intervention measures to solve these problems.Some serum samples were reexamined through sampling, and the agreement of the two tests was analyzed by using coincidence rate and Kappa value to evaluate the effect of the quality control of this survey.Through reexamination of the serum samples of 5 parasitic diseases, it was found that the overall coincidence rate of the two tests on the serum samples of 5 parasitic diseases were 98.85%, 97.47%, 97.21%, 92.84% and 98.14% respectively for cysticercosis, hydatidosis, paragonimiasis, tr ichinellosis and toxoplasmosis.The Kappa value of cysticercosis was 0.73 with good reproducibility, and the Kappa value for the other 4 parasitic diseases was respectively 0.94, 0.86, 0.77 and 0.87, indicating that all the serum samples of the 4 parasitic diseases had very good reproducibility.Significance test on the Kappa values of the two tests on the serum samples of 5 parasitic diseases was calculated, uvalues were all≥2.58, P < 0.01, indicating that the Kappa value of these 5 parasitic diseases was not accidental.

  Conclusion   It could be considered that the quality control for this seroepidemiological survey of 5 parasitic diseases was relatively ideal by fish-bone chart method.