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目的研究广州管圆线虫对福寿螺和褐云玛瑙螺感染性差异,阐述输入性福寿螺在中国作为广州管圆线虫中间宿主传播广州管圆线虫的潜能。方法生态学调查比较福寿螺和褐云玛瑙螺生存环境的差异及其在中国目前的地理分布,采集不同地理环境下福寿螺和褐云玛瑙螺分析自然环境下广州管圆线虫幼虫的感染率与感染度,同时观察自然环境下野生鼠感染广州管圆线虫的情况;在相同的条件下,用广州管圆线虫I期幼虫感染阴性的福寿螺和褐云玛瑙螺,观察福寿螺和褐云玛瑙螺在实验室的感染差异。结果对调查点发现的螺类检查发现,自然条件下福寿螺的感染率和感染度均低于褐云玛瑙螺,发现螺重与螺感染度呈正相关,大于20 g福寿螺平均感染度高于20 g以下的螺,差异有统计学意义(P<0.01);阳性螺孳生地捕获三种鼠,解剖检查发现广州管圆线虫总感染率为9.24%(22/238),褐家鼠的感染率高于黄胸鼠(P<0.05),并且雌鼠的感染率显著高于雄鼠(P<0.05);两种螺类在实验室人工感染条件下感染率和感染度比较差异均无统计学差异。结论在自然和实验室条件下褐云玛瑙螺、福寿螺对广州管圆线虫均易感,褐云玛瑙螺和福寿螺在自然环境条件下其感染率表现不同。福寿螺在我国适生环境广泛,长江以南均有分布,具备将广州管圆线虫从华南地区扩散到长江以南的潜能,福寿螺的扩散可导致我国广州管圆线虫流行区域的扩大。
Objective To study the difference of infection of Aralia elata and Acremonium coypus in Guangzhou, and to elucidate the potential of Enterobius constricta in China as an intermediate host of C. elegans in China. Methods Ecology investigation Compare the differences of living environment and the geographical distribution in China, the prevalence and infectivity of Larvae of Larvae in the natural environment were collected in different geographical environments , And observe the situation of the infection of Anemarrhena asiatica in the wild in the natural environment. Under the same conditions, the first instar larvae of A. cantonensis were infected with B. lupulus and A. angustifolia, The difference in infection. Results The snails found in the survey found that the prevalence and infectivity of B. tabaci were lower than those of A. fulica in natural conditions, and the positive correlation was found between the two. The average infection rates of M. spiralis greater than 20 g were higher than 20 g (P <0.01). Three kinds of rats were captured by positive snails, and the total infection rate of C. elegans was 9.24% (22/238). The infection rate of R. domestica was high (P <0.05), and the infection rate in female rats was significantly higher than that in male rats (P <0.05). There was no significant difference in infection rate and infection between the two species in laboratory artificial infection. Conclusion Both natural and laboratory conditions of A. niloticus and B. tabaci are susceptible to C. elegans, and their infection rates are different under natural environment. It has a wide range of suitable habitats and distribution in the south of the Yangtze River in China. It possesses the potential to disperse the C. elegans from south China to south of the Yangtze River. The proliferation of snails can lead to the expansion of the endemic area of C. elegans in China.