PROBLEM TO BE SOLVED: To provide a novel preventive and therapeutic agent for various dementias comprising mild cognitive impairment (MCI) or Alzheimers disease.SOLUTION: A heat water extract of a human tubercle bacillus, whose safety for humans is established from results of long-term clinical trials, is used.COPYRIGHT: (C)2015,JPO&INPIT【課題】新たな軽度認知機能障害(MCI)或いはアルツハイマー病を含む種々の認知症の予防剤及び治療剤を提供すること。【解決手段】長い臨床試験の結果からヒトでの安全性が確立している、ヒト型結核菌の熱水抽出物を用いる。【選択図】なし