第二中间宿主为景洪溪蟹和毛足溪蟹，前者的自然感染率为53.19%，后者为66.67%。

The second intermediate hosts are Potamon chinghungense and Potamon hispidum, with natural infectious rates of 53.19% and 66.67% respectively.

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中国研究人员得出结论，猪在这次病毒基因重配中未发挥中间宿主作用。

As such, the Chinese researchers have concluded pigs are not intermediate hosts for the deadly new strain of bird flu.

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目的调查福建省松溪县肺吸虫虫种，第一、二中间宿主及其感染率。

Objective Investigation of the species ofParagonimus, its first and second intermediate host (snail and crab) and the infection rate ofParagonimus in Songxi county, Fujian province.

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