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CDC称为非氧化2群(NO-2)的细菌,目前由15株需特殊营养的革兰氏阴性细菌组成。其中第1株收集于1983年,以后又收集到14株。所有细菌都从血培养中分离,大多数来自中青年,至少有4株在同一患者血液中分离2次以上。临床资料大多患有慢性病或手术后(脾切除)患者。NO-2群在生物学特征上非常相似,都为革兰氏阴性球杆菌,偶尔可见长或宽的形态。在麦康凯琼脂上,35℃培养3～7天可见到菌落。在牛心浸液琼脂上生长缓慢,形成点状菌落。不分解糖类,氧化酶阴性,无动力,产生可溶性的褐色色
The CDC is known as a non-oxidized 2-group (NO-2) bacterium and currently consists of 15 Gram-negative bacteria that require special nutrition. The first strain collected in 1983, and later collected 14 strains. All bacteria are isolated from blood cultures, most of them from middle-aged and young, at least 4 are separated more than twice in the same patient’s blood. Most clinical data are suffering from chronic diseases or after surgery (splenectomy) patients. The NO-2 group is very similar in biological characteristics, all of which are Gram-negative cocci, occasionally with long or wide patterns. Colonies were seeded on MacConkey agar at 35 ° C for 3 to 7 days. In bovine heart infusion agar slow growth, the formation of dot-shaped colonies. Does not break down sugars, oxidase negative, no power, produce soluble brown color