Dynamic analysis of distribution of Oncomelania hupensis in mountainous regions
- VernacularTitle:山丘型血吸虫病流行区钉螺分布的动态分析
- Author:
Fei ZHAO
;
Zhijie ZHANG
;
Haiyin WANG
;
Yibiao ZHOU
;
Wenxiang PENG
;
Qingwu JIANG
- Publication Type:Journal Article
- Keywords:
Oncomelania hupensis;
Mountainous region;
Distribution;
Dynamic
- From:
Chinese Journal of Schistosomiasis Control
2010;22(1):35-39
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the distribution of Oncomelania hupensis snails in mountainous regions and the dynamic charaeteristics of the distribution.Methods An environment calledLanbaoclosed to Puge County.Sichuan Provinee WaS selected as the study field.Random sampling was designed to determine the investigation sites.The snails were collected and the hying snaila were identified by the method of dissection in the laboratory.The distribution of snails was analyzed by some statistical indices,such as mean,variance and so on.Then the negative binomial distribution.log-normal distribution and exponential distribution were fitted to the snail data by the method of maximum likelihood estimation to explore the snail distribution in different time.Results The negative binomial distribution was fitted well to the snail data in April,May,July,August,September,November in 2008,and no distribution was fined to the snail data in June,October.December in 2008 and February in 2009.Conclusions The distribution of Oncomelania hupensis in mountainous regions is not simple negative binomial distribution,but pwbably a dynamic process and an uncertain distribution.
