鹦鹉热衣原体外膜抗原特性的研究——鹦鹉热衣原体不同纯化方法的比较试验

应用提纯物玻片姬姆萨氏染色镜检法、光学显微镜跟踪检查法、蛋白质含量紫外吸收检测法和电子显微镜技术对衣原体纯化方法作了比较研究,结果表明泛影葡胺法和改良蔗糖法优于氯仿法,用这两种方法提取的衣原体纯度高,颗粒形态清晰,结构完整,背影杂质少,提取的衣原体蛋白质浓度高。泛影葡胺法和改良蔗糖法可用于鸡胚中增殖的鹦鹅热衣原体的纯化。     

Trace detection of meglumine and diatrizoate from Bacillus spore samples using liquid chromatography/mass spectrometry

Following the September 11, 2001 terrorist attacks, letters containing Bacillus anthracis were distributed through the United States postal system killing five people. A complex forensic investigation commenced to identify the perpetrator of these mailings. A novel liquid chromatography/mass spectrometry protocol for the qualitative detection of trace levels of meglumine and diatrizoate in dried spore preparations of B. anthracis was developed. Meglumine and diatrizoate are components of radiographic imaging products that have been used to purify bacterial spores. Two separate chromatographic assays using multiple mass spectrometric analyses were developed for the detection of meglumine and diatrizoate. The assays achieved limits of detection for meglumine and diatrizoate of 1.00 and 10.0 ng/mL, respectively. Bacillus cereus T strain spores were effectively used as a surrogate for B. anthracis spores during method development and validation. This protocol was successfully applied to limited evidentiary B. anthracis spore material, providing probative information to the investigators.