[Study on assessing system for endemicity of schistosomiasis].

Zhongguo xue xi chong bing fang zhi za zhi = Chinese journal of schistosomiasis control

PubMedID: 23687802

Xu J, Xu JF, Zhu R, Lin DD, Wang TP, Li SZ, Guo JG, Zhou XN. [Study on assessing system for endemicity of schistosomiasis]. Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi. 2013;25(1):5-10.
OBJECTIVE
To establish a scientific, objective and operational assessing system for schistosomiasis endemicity, so as to provide a scientific evidence for revising the current Criteria for Control and Elimination of Schistosomiasis in China (GB 15976-2006).

METHODS
A questionnaire was designed based on reference review and 20 scientists working in the field of schistosomiasis control, research or management were investigated by using the Delphi method. The importance of each index reflecting the endemicity of schistosomiasis was scored by each scientist. The assessing system for endemicity of schistosomiasis was established and the normalized weight and combined weight were calculated.

RESULTS
The assessing system included three indices in the first grade and seven indices in the second grade. Among the indices in the first grade, the normalized weights of infection status of human beings, infection status of livestock, and Oncomelania snail's status were 0.360 2, 0.335 2, and 0.304 6, respectively. Among the indices in the second grade, the prevalence of livestock showed the highest combined weight of 0.335 2 while the infection rate of snails showed the lowest score of 0.093 3.

CONCLUSIONS
The indexes of the assessing system for the endemicity of schistosomiasis established are reasonable, comprehensive, and authoritative, which provide the scientific evidence for revising the currently available Criteria for Control and Elimination of Schistosomiasis in China.