[National surveillance of schistosomiasis from 2000 to 2002].
OBJECTIVE
To identify the trends of endemic situation at the twenty-one national surveillance sites from 2000 to 2002.


METHODS
According to the protocol of the national surveillance system, longitudinal surveillance of endemic situation of schistosomiasis was carried out at the twenty-one surveillance sites since 2000.


RESULTS
Relative indexes of endemic situation of schistosomiasis decreased in two surveillance sites annually. The infection rate of Schistosoma japonicum in human population decreased in most surveillance sites. The infection rate of cattle decreased in eight surveillance sites. However, acute cases were found in two sites each year. The density of live snails and infected snails was higher compared with that in 2000 among eight sites and infected snails were found in inner embankment in Junshan surveillance sites. Hunan Province, in 2002 at first time. The snail ridden areas increased significantly in Fengjin sites, Shanghai, where schistosomiasis was eliminated years ago.


CONCLUSIONS
Current control strategies have some impact on the morbidity of schistosomiasis. However, these strategies should be lasted for longer time and surveillance on snails should be enhanced.
Zhao
Qi
Q
School of Public Health, Fudan University.
Zhao
Gen-ming
GM
Chen
Xian-yi
XY
Wang
Li-ying
LY
He
Na
N
Wei
Jian-guo
JG
Jiang
Qing-wu
QW
D000293:Adolescent; D000328:Adult; D000818:Animals; D002417:Cattle; D002648:Child; D002675:Child, Preschool; D002681:China / Q000453:epidemiology; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D012552:Schistosomiasis / Q000453:epidemiology*; D012908:Snails / Q000469:parasitology