[Investigation on historical snail environments in Taizhou City].
OBJECTIVE
To understand the status of historical environments of Oncomelania snails in Taizhou City, Jiangsu Province and evaluate the current condition of snail control.


METHODS
The historical files of snail distribution were reviewed, field investigations were conducted, and all the data were analyzed.


RESULTS
Totally 7 822 historical snail environments were identified, the total area with snails were 4 252.98 hm2. According to the degree of environment reformation, all historical environments were classified to I, II, III, IV types, and the proportions of the Type I, II, III, IV were 28.3%, 2.4%, 19. 4%, 49.9% respectively. There were 2 snail environments currently, with total area of 3.60 hm2.


CONCLUSIONS
The snail status has been under well controlling, but most of the historical environments are suitable for snail breeding. Therefore, it is necessary to continue the snail surveillance.
Taizhou Center for Disease Control and Prevention, Jiangsu Province, Taizhou 225300, China.
Hong-Wei
HW
Zhou
Yu-Chuan
YC
He
D000818:Animals; D002681:China; D004197:Disease Reservoirs / Q000469:parasitology; D017753:Ecosystem; D049673:History, 20th Century; D049674:History, 21st Century; D012552:Schistosomiasis / Q000266:history / Q000469:parasitology*; D012908:Snails / Q000254:growth & development*