Establishment of an evaluation system for the field assessment of the Kato-Katz technique in detection of soil-transmitted nematodiasis / 中国血吸虫病防治杂志

Objective To establish an evaluation system for the field assessment of the Kato-Katz technique in detecting soiltransmitted nematodes, so as to provide insights into the field application of the Kato-Katz technique. Methods The initial evaluation indicators were determined through literature search, brainstorming and expert consultation. The evaluation indicatorswere improved and the weight of each indicator was decided through three rounds of expert consultation by using the Delphimethod. In addition, the expert authority coefficient and the coordination coefficient of each indicator were calculated at eachround of expert consultations. Results The recovery rates of the questionnaire were 100.00%, 100.00% and 89.29% at the firstto the third round of the expert consultations, respectively, and the expert authority coefficients were all more than 0.85 at eachround. The final evaluation system included 4 first-level indicators and 15 second-level indicators. In the first-level indicators, “detecting effect” and “funds investment” had the mean weighted value of 4.53 and 4.49, which were relatively higher than that of“person-time investment“ and "operability“ (both 4.34). Among the second-level indicators under each first-level indicator, thefour most significant indicators included “ability of personnel in egg discrimination“, “cooperation of village cadres and doctors“,“Person-time on testing“ and “organizational start-up cost“, with the mean weighted values of 4.74, 4.43, 4.39 and 4.17, respectively. The coordination coefficients were 0.39 to 0.65, 0.28 to 0.58 and 0.45 to 0.65 at the first to the third round of the expertconsultations, respectively, and there were significant differences in the coordination coefficients at all three rounds of the consultations (all P < 0.05). Conclusions An evaluation system for the field assessment of the Kato-Katz technique in detecting soiltransmitted nematodes is successfully established, among which “ability of personnel in egg discrimination“ and “cooperation ofvillage cadres and doctors“ have the greatest mean weighted values of the significance.

Comparative evaluation of the merthiolate-iodine-formaldehyde concentration technique and the Kato-Katz technique in the quantitative diagnosis of schistosomiasis japonica

A total of 384 stool specimens found to be positive for schistosoma eggs using the Direct Fecal Smear were further examined quantitatively by the MIFC and the Kato-Katz techniques. MIFC has a higher efficiency rate (95.57%) as compared to Kato-Katz technique (73.43%). Kato-Katz yields a higher percentage of false negatives (26.56%). These found to be statistically significant. With regards to quantification, Kato-Katz has a higher mean egg difference (245.69%) but this was found to be statistically significant. Thus, MIFC technique is more reliable and efficient than Kato-Katz in the quantitative diagnosis of Schistosomiasis japonica. (Auth. Sum.)

Investigation on compliance of schistosomiasis examination in Jiangshan City / 中国血吸虫病防治杂志

Objective To understand the differences of residents'compliance through stool and serum examinations on schistosomiasis and evaluate the effect of schistosomiasis surveillance and control in Jiangshan City.Methods The local residents and floating population from 9 villages were sampled with the stratified cluster method and investigated for schistosomiasis through the stool examination(Kato-Katz technique)and serum examination(ELISA),and the results were analysed.Results The rates of the examination accepted of the 1st stool,2nd stool and serum were 92.2%,89.7% and 99.7%,respectively.There were significant differences of the rates of the stool examination accepted in different groups of age and education background(P