Phototaxis effect of Oncomelania hupensis hupensis and O. h. robertsoni -- a comparative study
GONG Zhen-qiang1,LI Chuan-chang1,TAO Bo2,WANG Yan1,ZHOU Xian-min1,3,ZOU Jie-xin1
1.Department of Parasitology, College of Basic Medicine, Nanchang University, Nanchang 330031, China; 2.Schistosomiasis Control Station of Xingzi County, Xingzi 332800, China; 3.Key Laboratory of Poyang Lake Environment and Resource Utilization,Ministry of Education, Nanchang University, Nanchang 330047, China
Abstract:The aim of this study was to determine the differences in phototaxis between Oncomelania hupensis (O. h.) hupensis and O. h. robertsoni as well as four related geographic strains of male and female snails and Schistosoma japonicum-infected and -uninfected snails. Field collection of O. hupensis was performed in S. japonicum-endemic areas of Xingzi and Yushan counties in Jiangxi Province, China, as well as Tianquan and Pengshan counties in Sichuan Province, China. Infected and uninfected snails were screened using the cercariae escaping method, with artificial separation of male and female snails. The experiment was carried out in an in-house constructed dark phototaxis experiment box using white light as the main source of light at the most suitable light intensity. Under a light intensity of 1 500 Lux for 30 minutes, all of the snails from the experimental group showed obvious phototaxis. The statistical analysis showed no significant difference in the phototaxis index between male and female snails, and there was also no significant difference in the phototaxis index between different geographical strains of the same subspecies of snails. A significant difference in phototaxis was observed between the two subspecies during the 30-minute experimental period: O. h. hupensis displayed a higher phototaxis index than that of O. h. robertsoni, whereas S. japonicum-infected snails showed a lower phototaxis index than that of uninfected snails. A difference in phototaxis was found between different subspecies of O. hupensis and within the same subspecies. All uninfected snails displayed the same phototaxis index. When snails were infected with S. japonicum, phototaxis reduced.
龚珍强,李传昌,陶波,汪雁,周宪民,邹节新. 湖北钉螺指名亚种与滇川亚种的趋光性比较研究[J]. 中国人兽共患病学报, 2014, 30(8): 833-839.
GONG Zhen-qiang,LI Chuan-chang,TAO Bo,WANG Yan,ZHOU Xian-min,ZOU Jie-xin. Phototaxis effect of Oncomelania hupensis hupensis and O. h. robertsoni -- a comparative study. Chinese Journal of Zoonoses, 2014, 30(8): 833-839.
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