自定兴县医院外科一名急性出血性坏死性结肠炎患者血便中检出一株致病性大肠杆菌,经鉴定为O_(111)B_4菌株。现简报如下: 临床表现:患者40天前诊断为出血性坏死性结肠炎,采便前剧烈腹疼发热39.5℃,果酱色血便。鉴定结果:菌株形态特征:1、接种于普通培养基24小时后,菌落中等大小,直径约2-3毫米,凸起表面光滑,湿润、浑浊、乳白色、边缘整齐。 2、转种伊红美兰平板,菌落呈紫黑色,有金属光泽3、同时也接种在SS平板,菌落呈透明、光滑、湿润、边整1-2毫米无色。4、生化特性:卜、麦、甘糖产酸产气、乳糖、分解。硫化氢:阴性,靛基质:产 A pathogenic Escherichia coli was identified from the blood of a patient with acute hemorrhagic necrotizing enterocolitis in the hospital of Dingxing County and was identified as O_ (111) B_4 strain. Now briefings are as follows: Clinical manifestations: patients diagnosed as hemorrhagic necrotizing colitis 40 days ago, before taking the stool abdominal pain fever 39.5 ℃, jam color bloody stools. Identification results: Strain morphological characteristics: 1, 24 hours after inoculation in normal medium, colonies medium size, diameter of about 2-3 mm, the convex surface is smooth, moist, cloudy, milky, tidy edges. 2, Replaced Euphemium plate, the coloration was purple, metallic luster 3, but also inoculated on the SS plate, the colonies were transparent, smooth, moist, while the whole 1-2 mm colorless. 4, biochemical characteristics: BU, wheat, sugar acid gas production, lactose, decomposition. Hydrogen sulfide: negative, indigo matrix: production