船只未发现携带钉螺。
感染性钉螺分布与病人分布高度一致。
The distribution of infected snails and schistosomiasis cases were highly identical.
在硬化斗渠中仅查出1只感染性钉螺。
螺钉螺帽永远不会合适。
感染性钉螺密度较高。
目的：了解钉螺体表经茶树籽浸液作用后的损害状况。
AIM:To observe the lesion of tegument of Oncomelania snails treated with seed of Camellia Sinensis(SCS) .
目的了解山区水库季节性灌溉对感染性钉螺产生的潜在影响。
Objective To learn the potential impact of seasonal irrigation on the infected snails in a hilly reservoir.
目的：为了探讨钉螺孳生地微环境理化因素对钉螺分布的影响。
Objective: to explore the impacts of the microenvironment physical chemical factors of snail habitat on the snails distribution.
实验点与对照点相比，钉螺生殖腺丰满度的月份变化不相一致。
The dimension of snail's spermary or ovary varied with month and the trend was not identical among the spots.
钉螺沉降轨迹角度与水流速度呈正相关，与钉螺大小呈负相关。
The angle formed by water level and track suspended settling of snail had positive correlation with water velocity and negative with snail size.
研究人员发现适宜于钉螺和血吸虫生长的时期在过去几十年中有不同程度的延长。
The researchers found that an increase in the length of time environmental conditions were ideal for the growth of both the Oncomelania snail and the Schistosome worm.
目的了解1998年洪水后对鄱阳湖区洲滩钉螺分布的影响及其现状。
Objective To understand the impact of the flood in 1998 on the snail distribution in the marshland around the Poyang Lake.
科学家担心由于长江水位的改变，会使得未感染区域滋生一些钉螺栖息地。
Scientists fear changes in water levels along the Yangzi could create new snail habitats in areas previously untouched by the disease.
目的结合遥感技术和地面生态学调查数据区分钉螺孳生地并监测其变化。
Objective to identify snail habitats and monitor the changes by combining remote sensing technique with the ground-based ecological data.
背景资料摘要：腰椎后路椎弓钉螺钉放置时常常出现偏离预定轨道的情况。
Summary of Background Data. Deviations from planned trajectories occur in a significant number of screw placements in posterior lumbar fixation.
因此认为，钉螺酯酶同工酶酶谱的特征能较好地反映钉螺属内的亲缘关系。
These results indicated that the characteristics of the ESTisoenzyme pattern were helpful to studies on relationship on Genus Oncomelania and classification.
观察的内容包括：钉螺感染率、死亡率、尾蚴逸出前期及逸出尾蚴数量等。
The infection rate, mortality, precercarial period and cercarial production of test snails were observed and compared.
目的阐明长江下游地区钉螺再次迁入无螺江滩后的钉螺消长和分布变迁规律。
Objectives to understand the fluctuation and distribution pattern of Oncomelania snails after migrated into marshland where no snail infested.
目的描述人工灌溉区钉螺生长繁殖特征，为实施生态学方法控制钉螺提供理论依据。
Objective to explore the rule of growth and multiplication of snails in man made irrigation, and thus to provide evidence for snail control with ecological method.
目的研究畜主健康教育（健教）、耕牛管理组合措施控制江滩地区阳性钉螺的作用。
Objective To evaluate the eff ec tof infected snail control with the intervention of health education and cattle supervising in marshland.
方法应用系统抽样法进行现场查螺，现场和实验室模拟水淹实验观察钉螺存活情况。
Methods Systematic sampling method was used in field Oncomelania investigation, and laboratory and field simulating drowning methods were also performed to observe survival of Oncomelania.
不同流行程度地区以传播阻断地区增加幅度最为明显，钉螺面积上升了64.78%。
The area of snail increased by 64.78% in transmission interruption area that was most remarkably in different endemic degree region.
目的实验室恒温条件下初步观察钉螺的耐寒能力，推测钉螺在空气环境下的致死低温。
Objective to research the cold hardiness of snails in the constant temperature condition in laboratory, and speculate on the lower lethal temperature of snails in dry air.
目的介绍一种采用3s空间技术，具有快速、高效、准确、数字化特点的钉螺调查方法。
Objective To introduce a quick, efficient, accurate and digital method of 3s spatial technology for snail survey in ditches.
目的介绍并应用广义负二项分布研究湖北钉螺的分布规律，为定量化研究提供理论依据。
Objective To study the distribution of Oncomelania hupensis with generalized negative binomial distribution, and provide the theoretical support for quantitative study.
目的介绍并应用广义负二项分布研究湖北钉螺的分布规律，为定量化研究提供理论依据。
Objective To study the distribution of Oncomelania hupensis with generalized negative binomial distribution, and provide the theoretical support for quantitative study.
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