Newly collected rabit coccidia oocysts of Eimeria stiedae were exposed to different amount of ultra-violet ray.The curve of survival rates and time had a shape like a S turned 180o from left to right.

• 用刚收集的兔球虫卵囊，经紫外线照射，不同照射剂量的未孢子化卵囊的存活率不同，其存活率呈反S形曲线。