[Development and application of geographic information system of Aedes vector in Chaozhou city, Guangdong province].
OBJECTIVE
To explore the spatial distribution character of dengue fever and the change of Aedes' population, so as to provide macroscopical decision-making evidences of prevention and supervision on dengue fever.


METHODS
(1) Collecting data on morbidity of dengue and supervision on vector's population in the corresponding period. (2) Drawing digitized map of Chaozhou in scale of 1:50,000, including elements of boundary, residential areas, road and traffic, altitude, water systems etc. (3) Measuring the latitude and longitude of center position of surveillance safes on the scene. (4) Processing spatial analysis by the ArcGIS 8.5 software.


RESULTS
Distribution of Aedes showed spatial cluster in Chaozhou, while its density was related to the distance to the watersides. The closer to the watersides, the higher the density was. Map on spatial distribution showed that although the Aedes epidemic situation changed yearly, but primarily be kept in high, middle, low regions. Cross-validation effects of the distribution maps were satisfactory.


CONCLUSIONS
Geographic information system was promising in analyzing data on dengue fever, and better than other routine research methods.
Yi
Bin-tang
BT
Department of Epidemiology, Faculty of Preventive Medicine, Fourth Military Medical University, Xi'an 710032, China.
Xu
De-zhong
DZ
Zhang
Zhi-ying
ZY
Zhang
Bo
B
Xi
Yun-zhen
YZ
Fu
Jian-guo
JG
Luo
Jun
J
Yuan
Ming-hui
MH
Liu
Shao-qun
SQ
D000330:Aedes; D000818:Animals; D002681:China; D003715:Dengue / Q000517:prevention & control; D003716:Dengue Virus; D004463:Ecology; D040362:Geographic Information Systems / Q000592:standards / Q000706:statistics & numerical data*; D005843:Geography; D007303:Insect Vectors / Q000821:virology