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进行四项试验观察Ｂａｙｃｏｘ对柔嫩艾美尔球虫的作用及其对球虫免疫力影响。Ｂａｙｃｏｘ均以推荐浓度（２５ｐｐｍＴｏｌｔｒａｚｕｒｉｌ）混入水中任鸡自由饮用。以２０００卵囊剂量感染并立即给药的鸡，在感染后６－２０ｄ粪便中始终没有发现卵囊，表明Ｂａｙｏｏｘ具有杀虫作用而不是抑虫作用。以８×１０￣４卵囊剂量感染鸡，在感染前１ｄ和感染后０、１、２、３、４、５ｄ分别开始给药，根据血便数量和盲肠病变判断，Ｂａｙｃｏｘ的作用峰期是在感染后０－２ｄ之间。感染后第４ｄ再给药已无治疗作用。停药１ｄ后，药物残效对感染仍显出一定的抗球虫作用，但是停药２ｄ后，这种作用即基本消失。采用攻毒的方法表明Ｂａｙｃｏｘ不影响抗球虫免疫力的形成。
Four experiments were conducted to investigate the effects of Baycox on Ctenopharyngodon idellus and its effect on coccidiosis immunity. Baycox are recommended concentrations (25ppmToltrazuril) into the water free to drink chicken. Chickens infected at 2000 oocysts with immediate administration had no oocysts found in the feces of 6-20 days after infection, indicating that Bayoox has insecticidal rather than pest-repelling effects. The chickens were inoculated with 8 × 10 ~ 4 oocysts, and were administered 1 day before infection and 0, 1, 2, 3, 4 and 5 days after infection. According to the number of bloody stools and the caecum lesions, the peak period of Baycox was 0-2d after infection. Infected 4d after treatment has no therapeutic effect. Drug withdrawal 1d, the drug residue still shows some anti-coccidial effect on infection, but after stopping 2d, this effect is basically disappeared. The method of challenge shows that Baycox does not affect the formation of anti-coccidiosis immunity.