New research shows that it is ineffective to use sulfa drugs (including sulfapyridine and ethylamine) for preventing toxoplasma infection. 15 percent AIDS have toxoplasma.

新的研究发现，采用磺胺类药物包括（磺胺嘧和乙胺嘧及SMZco）预防弓形虫感染是无效的。15%的AIDS患者合并有弓形虫。