Oncomelania is the only intermediate host of schistosome.

钉螺是血吸虫唯一的中间宿主.

And the mammalian animal (the end host) and snails (the intermediate host) are their two hosts.

哺乳类动物（终末宿主）和钉螺（中间宿主）是血吸虫的两个宿主。

Its second intermediate host of Paragonimus is Sinopotamon pinheense crab and the reservoir hosts are cats and dogs.

第二中间宿主为平和华溪蟹。保虫宿主有猫、犬。

Objective Understand the infection status of Angiostrongylus cantonensis in main intermediate host sampled from market and restaurant in Guiyang.

目的了解贵阳市流通及餐饮市场广州管圆线虫主要中间宿主的感染状况。

Results:With the change of the propagation environment, the density of the intermediate host of paragonimus and the infection rate of brook crab reduced significantly.

结果：滋生环境的改变使并殖吸虫中间宿主的密度和溪蟹的感染度明显下降。

Objective:To diagnoses the effect of environment change on the density and the infection rate of the intermediate host of paragonimus.

目的：调查分析生态环境的变化对并殖吸虫中间宿主密度和感染度影响的程度和主要原因。

Objective: To diagnoses the effect of environment change on the density and the infection rate of the intermediate host of paragonimus.

目的：调查分析生态环境的变化对并殖吸虫中间宿主密度和感染度影响的程度和主要原因。

This virus was different because it moved directly from chickens to people, rather than having been altered by infecting pigs as an intermediate host.

这种病毒之所以不同，是因为它并没有通过传染猪，使猪成为中间宿主，而是直接由鸡传染给人类。

This virus was different because it moved directly from chickens to people, rather than having been altered by infecting pigs as an intermediate host .

这种病毒之所以不同，是因为它并没有通过传染猪，使猪成为中间宿主，而是直接由鸡传染给人类。

Objective To study the species and infection rate of intermediate host of Paragonimus.

目的了解建瓯市并殖吸虫及媒介宿主的种类与感染情况.