An antibiotic obtained from a strain of the actinomycete Streptomyces erythreus, effective against many gram - positive bacteria and some gram - negative bacteria.

• 红霉素一种抗生素，可以由放线菌的变形得到链霉菌性红细胞增多，有效地抵制许多革兰氏阳性菌和一些革兰氏阴性细菌