[Surveillance and forecast for schistosome infectivity of Yangtze River and Hanbeihe River during flooding in Hubei Province].
OBJECTIVE
To investigate the schistosome infectivity of the water body of the Yangtze River and Hanbeihe River during flooding in Hubei Province.


METHODS
The Oncomelania snail status was investigated in 17 sites of the Yangtze River and Hanbei River, and the infectivity of schistosome in sentinel mice was also determined.


RESULTS
In the Yangtze River and Hanbei River, the average densities of living snails were 0.35 snails/0.1 m2 and 0.67 snails/0.1 m2 respectively, and the average infection rates of snails were 0.33% and 0.05%, respectively. The sentinel mouse surveillances were carried out twice in 10 sites of the Yangtze River. During the first surveillance the infection rate was 5.5% with 4 positive environment sites, and that was 5.5% with 7 positive environment sites in the second surveillance. The sentinel mouse surveillance was carried out once in 7 sites of the Hanbeihe River, and the infection rate was 11.9% with 4 positive environment sites.


CONCLUSIONS
By monitoring schistosome infection of the water body, we can understand the threat of environment and provide warning information to prevent from the outbreak and spread of acute schistosomiasis. We can also indirectly get many messages about the quality of snail investigation and the effect of mollusciciding.
Hubei Provincial Center for Disease Control and Prevention, Wuhan 430079, China.
Zu-Wu
ZW
Tu
Shun-Xiang
SX
Cai
Xi-Bao
XB
Huang
Zheng-Ming
ZM
Su
Hua
H
Gao
Yan-Yan
YY
Chen
Mu-Min
MM
Cao
Guan-Xiang
GX
Mao
Ping-Feng
PF
Xia
D000818:Animals; D002681:China / Q000453:epidemiology; D004777:Environment; D005260:Female; D055868:Floods; D005544:Forecasting; D008297:Male; D051379:Mice; D011157:Population Dynamics; D045483:Rivers; D012552:Schistosomiasis / Q000453:epidemiology* / Q000517:prevention & control; D018571:Sentinel Surveillance; D012908:Snails / Q000469:parasitology*