infectivity

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

对家蚕有中等程度感染能力，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类中人体异致源——简单异幼感染情况,进行本调查。