Fitzgerald R F, Adams B O
J Clin Microbiol. 1975 Feb;1(2):239-40. doi: 10.1128/jcm.1.2.239-240.1975.
Incorporation of the antibiotic polymixin B sulfate in plates of Mitis-Salivarius medium at a level of 100 U per ml effectively suppressed the growth of gram-negative spreading organisms which occasionally overgrow Mitis-Salivarius plates of oral samples and make them unsuitable for enumeration and differentiation of streptococci. At the indicated level the antibiotic did not affect the growth or typical colonial characteristics of the oral streptococci.
在米氏-唾液链球菌培养基平板中加入硫酸多粘菌素B,浓度为每毫升100单位,可有效抑制革兰氏阴性扩散菌的生长,这些细菌偶尔会在口腔样本的米氏-唾液链球菌平板上过度生长,使其不适用于链球菌的计数和鉴别。在所示浓度下,该抗生素不影响口腔链球菌的生长或典型菌落特征。