infectivity

The microsporidian had a medium oral infectivity and low transovarian transmission to sillworm, Bombyx mori.

对家蚕有等程度的感染能力，经卵传染频率较低.

An investigation of Anisakis simplex larvae,the most important causative agent of anisakiasis,in marine fishes caught in Bohai sea was carried out in order to detect their infectivity.

为了了解渤海各种鱼体异尖线虫的主要致——异尖线虫幼虫的感染情况,进行本调查。