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

新的现，采用磺胺类药物包括（磺胺啶和乙胺啶及SMZco）预防弓形虫无效的。15%的AIDS患者合并有弓形虫。