Establishment and application of quality control system for detection of schistosomiasis in Jiangsu Province II Evaluation of pathogenic detection capacity of county-level personnel / 中国血吸虫病防治杂志

ABSTRACT

Objective To evaluate the pathogenic detection capacity of county-level organizations in Jiangsu Province,and to improve the field schistosomiasis detection capacity of professional personnel,thus to provide the technical support for the con-struction of quality control system of schistosomiasis field detection.Method The eggs of Schistosoma japonicum were obtained from rabbit schistosomiasis models and were produced into suspensions at four different concentrations.The county-level workers were invited to hatch the eggs,and the accuracy,detection error rate and omission rate were compared between the detection re-sults and the standard results.The single-blind method was used in the capacity examination. Result A total of 560 suspen-sions were detected by 28 counties(districts,cities),and 283 positive samples and 203 negative samples were detected.The total accuracy was 86.79%,total error rate was 9.38%,and total omission rate was 15.77%.The difference between the detection re-sult and standard result was statistically significant(χ2=12.99,P<0.01).Twenty out of 28 counties(districts,cities)had omis-sion detections,accounting for 71.43%;and 13 had fault detections,accounting for 46.43%.The error rates of workers from the river marshland,hilly areas,water networks,and lake marshland ranged from 4.55% to 43.75%,and the difference was statistical-ly significant(χ2=30.34,P<0.01).The omission rate ranged from 4.17% to 20.45%,and the difference was not statistically sig-nificant(χ2=5.09,P=0.17).The error rates and omission rates of workers from the transmission control areas and transmission interruption areas were 7.50%,13.33% and 10.42%,17.13%,respectively,and the differences were not statistically significant (χ2=0.229,0.575,both P>0.05).The error rates and omission rates of workers from the areas with or without at least ten years history of transmission control were 11.81%,5.00% and 16.67%,14.17%,respectively,and the differences were not statistically significant(χ2=2.804,2.848,both P>0.05).The error rates of workers from the areas with or without at least ten years history of transmission interruption were 11.54% and 10.00%, respectively, and the difference was not statistically significant(χ2=0.069,P=0.792),while the correspondent omission rates were 10.90% and 35.00% respectively,and the difference was statisti-cally significant(χ2=17.364,P<0.01).Conclusion The detection error and omission exist in the schistosomiasis examina-tions in the county-level organizations in Jiangsu Province,and therefore,the field pathogen detection capacity of the professional personnel needs to be further improved.