表示只有单一微生物感染的无菌生物体。

The barrier effect of B. bifidum 6-lN selected from a human infant on S. flex-neri 2a in the intestine of gnotobiotic guineapigs monoassociated with B.subtilis was studied. It indicates that the barrier effect of B.bifidum was shown only when B.bifidum was used as the first microorganism to colonize itself in the intestine, whereas repea.ted administrations of B.bifidum were needed to control a pre-established shigella infection.

已知菌(枯草杆菌)豚鼠体内观察人体双歧杆菌和福氏志贺氏菌的相关作用。本实验表明人体双叉双歧杆菌(B.bifidum 6-1N)预先定居于肠粘膜和以后定居时对福氏志贺氏菌(S.flexneri 2a)感染的发生和发展及其转归具有明显的拮抗作用。本文提示双歧杆菌制剂用于预防或治疗腹泻有可能性。