Hollis D G, Daneshvar M I, Moss C W, Baker C N
Emerging Bacterial and Mycotic Diseases Branch, Centers for Disease Control and Prevention, Atlanta, Georgia 30333, USA.
J Clin Microbiol. 1995 Mar;33(3):762-4. doi: 10.1128/jcm.33.3.762-764.1995.
Eleven strains of eugonic, nonoxidative, gram-negative rods isolated from clinical specimens formed a distinct group that was designated CDC group IIg. Five of the 11 isolates were from wounds. The phenotypic characteristics of CDC group IIg were most similar to those of Weeksella species, with the major difference being that CDC group IIg strains grew on MacConkey agar in 1 to 2 days, did not hydrolyze gelatin, and did not produce urease. All 11 strains of CDC group IIg possessed a distinct fatty acid profile that was characterized by large amounts (19 to 29%) of 18:1 omega 7c, 16:0, and 16:1 omega 7c, moderate amounts (6 to 10%) of 3-OH-14:0 and 14:0, and smaller amounts (1 to 2%) of 18:2, 18:0, and 3-OH-16:0. This fatty acid profile differs from those of Weeksella species by the absence of branched-chain fatty acids. CDC group IIg contains ubiquinone-8, as opposed to menaquinone-6 in Weeksella species. The isolates were susceptible to a variety of antimicrobial agents, including the aminoglycosides, tetracyclines, quinolones, sulfonamides, and polymyxin B.
从临床标本中分离出的11株生化反应良好、非氧化型、革兰氏阴性杆菌形成了一个独特的菌群,被命名为CDC IIg群。11株分离菌中有5株来自伤口。CDC IIg群的表型特征与韦克斯氏菌属最为相似,主要区别在于CDC IIg群菌株在麦康凯琼脂上1至2天内生长,不水解明胶,不产生尿素酶。CDC IIg群的所有11株菌株都具有独特的脂肪酸谱,其特征是含有大量(19%至29%)的18:1 ω7c、16:0和16:1 ω7c,适量(6%至10%)的3-OH-14:0和14:0,以及少量(1%至2%)的18:2、18:0和3-OH-16:0。这种脂肪酸谱与韦克斯氏菌属的不同之处在于不存在支链脂肪酸。CDC IIg群含有泛醌-8,而韦克斯氏菌属含有甲基萘醌-6。这些分离菌对多种抗菌药物敏感,包括氨基糖苷类、四环素类、喹诺酮类、磺胺类和多粘菌素B。