Experimental evaluation of Candonocypris novaezelandiae(Crustacea:Ostracoda) in the biocontrol of Schistosomiasis mansoni transmission

作     者：Fouad Yousif Sherif Hafez Samia El Bardicy Menerva Tadros Hoda Abu Taleb 

作者机构：Department of Environmental Research and Medical MalacologyTheodor Bilharz Research InstituteWarrak El Hadar.Imbaba.Egypt Department of Plant ProtectionFaculty of AgricultureAin Shams UniversityCairoEgypt Department of Environmental Research and Medical Malacology.Theodor Bilharz Research InstituteWarrak El Hadar.Imbaba.Egypt 

出 版 物：《Asian Pacific Journal of Tropical Biomedicine》 (亚太热带生物医学杂志（英文版）)

年 卷 期：2013年第3卷第4期

页      面：267-272页

学科分类：1002[医学-临床医学] 100201[医学-内科学(含：心血管病、血液病、呼吸系病、消化系病、内分泌与代谢病、肾病、风湿病、传染病)] 10[医学] 

基　　金：Supported by the Academy of scientific Research and Technology in Egypl Program of the National Strategy for Biotechnology and Genetie Engineering(Grant No.41/2005) 

主　　题：Candonocypris novaezelandiae Schistosoma mansoni Biomphalaria alexandrina Biological control Schistosomiasis 

摘      要：Objective:To test Candonocypris novaezelandiae(Baird)(***),sub-class Ostracoda,obtained from the Nile,Egypt for its predatory activity on snail,Biomphalaria alexandrina(***),intermediate host of Schistosoma mansoni(***)and on the free-living larval stages of this parasite(miracidia and cercariae).Methods:The predatory activity of *** was determined on *** snail(several densities of eggs,newly hatched and juveniles).This activity was also determined on *** miracidia and cercariae using different volumes of water and different numbers of *** was also tested for its effect on infection of snails and on the cercarial ***:*** was found to feed on the eggs,newly hatched and juvenile snails,but with significant reduction in the consumption in the presence of other diet like the blue green algae(Nostoc muscorum).This ostracod also showed considerable predatory activity on the free-living larval stages of *** which was affected by certain environmental factors such as volume of water,density of *** and number of larvae of the ***:The presence of this ostracod in the aquatic habitat led to significant reduction of snail population,infection rate of snails with schistosme miracidia as well as of cercarial production from the infected *** may suggest that introducing *** into the habitat at schistosome riskv sites could suppress the transmission of the disease.