(57)< Abstract > With this bill, defense after the being infected and 1 mass dosage disposal plans are included, nervous study or the infection mammal of sensitivity or those remedy or after the being infected the composition and its method of dealing with defend are disclosed the infection mammal which has contracted a disease in the miscarriage cause characteristic disease by the parasite like the disposal possible residence meat spore insect symptom, the neosupora symptom or the toxoplasma symptom or the isosupora symptom with the purajikanteru chemical compound by purajikanteru of the medicine manufacture study effective quantity or prescribing that derivative content composition.本明細書では、感染後防御的および1回大量投与処置計画を含む、製薬学的有効量のプラジカンテルもしくはその誘導体含有組成物を投与することによるプラジカンテル化合物で処置可能な住肉胞子虫症、ネオスポラ症もしくはトキソプラズマ症もしくはイソスポラ症のような寄生虫による神経学的もしくは流産惹起性疾患に感受性の感染哺乳動物もしくはそれらを罹患している感染哺乳動物を治療的もしくは感染後防御的に処置する組成物およびその方法が開示される。