作者: J. Dziekońska-Rynko , J. Rokicki , P. Gomułka
DOI: 10.1017/S0022149X09990526
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摘要: Laboratory-bred goldfish were experimentally infected with Contracaecum rudolphii, either directly (with nematode larvae) or indirectly via zooplankton. Intensity and prevalence of infection markedly higher in fish exposed to the zooplankton than larvae. When transmitted zooplankton, larvae developed much faster and, after 8 weeks, became firmly encysted intestine wall. The digestive tract isolated from wall showed a well-developed ventriculus, ventricular appendix intestinal caecum. mouth was surrounded by three lips. free-living induced infection, they rapidly penetrated migrated internal organs (e.g. liver). primordial lips those poorly visible, short, caecum absent. During 10-week experiment, no found