It was found out that maduramicin production strains had strong antiseptic activities against g + bacteria while maduramicin non - producing strains had no antiseptic activities . no new antibiotics proved to be produced by the result 我们对尤马马杜拉放线菌的产素不稳定性进行研究，同时进行马杜霉素高产菌株的选育和发酵工艺的改良。
2.
Their life cycles and characteristics of their colonies were observed and strain s - l was found to have the typically morphological differentiation of a . yumaense . the morphological differences of every mutants and the period of morphological block were ascertained 尤马马杜拉放线菌( actinomadurayumaense )是马杜霉素( maduramicin )的产生菌，有明显的产素不稳定性，影响工业生产。
