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[Analysis of endemic status of schistosomiasis in Gaoyou City from 1970 to 2009].

OBJECTIVE
To explore the changing rule of schistosomiasis endemic situation in Gaoyou City, so as to provide the evidences for schistosomiasis control in lake and marshland regions.


METHODS
The endemic data of schistosomiasis of Gaoyou City from 1970 to 2009 were collected to analyze the endemic patterns of schistosomiasis in different control stages comprehensively.


RESULTS
In the first years of infection control stage (1970-1975), transmission control stage (1976-1994) and transmission interruption stage (1995-2009), the prevalence rates of schistosomiasis were 4.20%, 0.80% and 0 in human and 3.00%, 0.51% and 0 in cattle respectively. In 1984, the positive rate of crowd stool tests fell to 0.04%, which was reduced by 99.05% compared with that in 1970. From 1970 to 1980, the positive rates of stool tests of people and livestock were positively correlated significantly (r = 0.67, P < 0.05). After 1985, no local infection patients or cattle were found. No schistosome infected Oncomelania hupensis snails were found from 1970 to 2009.


CONCLUSIONS
The comprehensive control measures have been insisted in Gaoyou City in different prevention and control stages. Although the snail situation is undulate, the prevalence of schistosomiasis steadily declines and the interruption of transmission has achieved.