分子流行病学,临床特征和Shiga毒素检测的意义从常规检测胃肠炎标本的检测
Christopher Kiss1, Despina Kotsanas2, Michelle J Francis1
1Department of Microbiology, Monash Health, Clayton, Vic, Australia.
Pathology
|June 4, 2023
概括
在120名使用多重PCR的患者中检测到Shiga毒素 (stx) 基因. 虽然发烧和血性腹等常见症状很常见,但只有一个患者患有溶血性尿素综合征.
科学领域:
- 微生物学 微生物学
- 传染性疾病 传染性疾病
- 分子诊断学 分子诊断学
背景情况:
- 滋果毒素产生细菌是人类重要的病原体.
- 多复合PCR提供了一种快速的方法来检测像stx1和stx2.2这样的毒性基因.
研究的目的:
- 在便样本中评估Shiga毒素 (stx) 基因的流行率.
- 为了将stx基因型与临床表现和结果相关联.
- 识别与stx基因检测相关的常见细菌血清型.
主要方法:
- 在31个月内对便多重体PCR结果进行了回顾性分析.
- 对stx1和stx2基因的检测.
- 对阳性标本进行细菌培养和血清定型.
- 对具有stx基因检测的患者的临床数据的审查.
主要成果:
- 在14179例便检测中,有120例检测出stx基因 (0.84%).
- 在35%,22%和42%的阳性病例中分别检测到stx1和stx2基因.
- 大肠杆菌O157:H7是主要的血清型 (19%的培养阳性病例).
- 观察到高发烧率 (35%),血性腹 (34%) 和急性损伤 (27%) 的情况.
- 在stx基因型和症状或并发症之间没有发现显著的关联.
- 血清型O157:H7和O26:H11显著与血便相关.
结论:
- 多重PCR是有效的检测在便样本中的stx基因.
- 虽然stx基因与严重的胃肠道疾病有关,但在这个队列中,严重的并发症,如溶血性尿素综合征是罕见的.
- 特定的大肠杆菌血清型与流血性腹有关,这凸显了血清型在临床诊断中的重要性.
相关概念视频
01:29Modern Molecular Taxonomy
56
Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...
56
01:20Applications of Molecular Taxonomy
42
Molecular taxonomy has revolutionized the understanding and classification of bacteria, providing precise insights into their diversity, evolutionary relationships, and ecological roles. By utilizing molecular techniques such as DNA sequencing and fingerprinting, researchers have made significant strides in various fields related to bacterial studies.Resolving Taxonomic AmbiguitiesMolecular taxonomy has been instrumental in distinguishing closely related bacterial species initially thought to...
42