EFFECT OF SCHISTOSOMA JAPONICUM INFECTION ON ONCOMELANIA HUPENSIS
- VernacularTitle:日本血吸虫幼虫寄生对钉螺生存影响的研究
- Author:
Leping SUN
;
Xiaonong ZHOU
;
Qingbiao HONG
;
Yixin HUANG
;
Feng WU
;
Ku YANG
- Publication Type:Journal Article
- Keywords:
Schistosoma japonicum;
Oncomelania snail;
Expected survival time;
Survival time curve
- From:
Chinese Journal of Schistosomiasis Control
1989;0(04):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To understand the effect of Schistosoma japonicum infection on Oncomelania hupensis. Methods Uninfected Oncomelania snails were collected from the marshland of the Yangtze River in Anhui Province and exposed to and infected with miracidia of S.japonicum in the laboratory. After the exposure, those snails and unexposed snails as the control were raised in the natural environment of the same field and all the snails were observed and recorded every 10 days. The survival rate and death rate were calculated, and expected survival time was also calculated with the animal life table method. Results The peak of death of the infected snails was between 60 and 70 days after the exposure, and the expected survival time was 63.46 days and the longest survival time was 135 days. The peak of death of the unexposed snails was between 80 and 90 days, and the expected survival time was 83.54 days and the longest survival time was 155 days. The expected survival time of the infected snails was 24.04% shorter compared with that of the uninfected. Conclusion The death rate of snails infected with S.japonicum increases and the survival time decreases in the natural environment.
