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相关概念视频

Infection01:20

Infection

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When a pathogen enters the body and reproduces, it can cause an infection, damage body cells, and cause illness symptoms that eventually lead to disease. Therefore, its prevention requires breaking the chain of infection.
The chain begins with pathogens: bacteria, viruses, fungi, prions, or parasites such as protozoa helminths. These can be present on the skin as transient or resident flora, or they can be acquired from the environment. Identifying and treating the type of infection and...
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Urinary Tract Infection II: Pathophysiology01:25

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The pathophysiology of urinary tract infections (UTIs) encompasses several progressive stages, beginning with bacterial colonization and culminating in potential systemic complications if untreated. UTIs are primarily initiated by bacteria, such as Escherichia coli, which often originate from the gastrointestinal tract and migrate to the urinary system through the periurethral area. This migration can occur via several routes, including improper hygiene practices, sexual activity, or...
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Cystic fibrosis (CF), an autosomal recessive disorder, significantly affects the function of exocrine glands. This genetically inherited disease is characterized by the production of thick and sticky mucus, which can severely affect various organs and systems in the body.
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Stages of infection describe what happens to a susceptible host once a pathogen invades the human body. The stages of infection are incubation, prodromal, illness, stage of decline, and convalescence. The incubation stage is the period from exposure to a pathogen until symptoms start. The infected person is unaware of impending illness as the pathogens grow and multiply within the body. The duration may vary depending on the type of infection. The incubation period of measles averages ten to...
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The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
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基础科学和病原发生学

Marios Georgiadis1, Franca Auf der Heiden2, Jeffrey Nirschl1

  • 1Stanford University, Stanford, CA, USA.

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概括
此摘要是机器生成的。

计算分散光成像 (ComSLI) 在任何组织学部分提供脑神经纤维轨迹的微米分辨率映射. 这种具有成本效益的方法揭示了神经退行变化,克服了现有技术的局限性.

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科学领域:

  • 神经科学是一个神经科学.
  • 生物医学成像技术 生物医学成像技术
  • 计算病理学计算病理学

背景情况:

  • 神经退行性疾病会破坏大脑的神经纤维网络,但大规模的连接分析具有挑战性.
  • 电子显微镜,扩散核磁共振和极化显微镜等现有方法在分辨率,体积或样本准备方面存在局限性.
  • 需要一种方法来解决大组织区域的高分辨率的神经元轨迹.

研究的目的:

  • 引入和验证计算散射光成像 (ComSLI) 用于解决神经元轨迹在组织学部分.
  • 为了证明ComSLI在微米分辨率下绘制纤维方向和重建大脑通道的能力.
  • 评估ComSLI在研究神经退行,特别是海马管道的神经退行方面的有效性.

主要方法:

  • 计算分散光成像 (ComSLI) 用于标准的甲固定嵌入 (FFPE) 人类大脑部分和较旧的纤维素嵌入部分.
  • 该ComSLI设置使用微米分辨率的摄像机适配器系统与旋转的LED光源,在多个旋转步骤获取图像.
  • 图像分析涉及使用SLIX软件量化方向,使用MATLAB进行方向分析,以及使用MRtrix3.3进行曲谱.

主要成果:

  • 康斯利生成了微米分辨率的全脑纤维定向图,解决了体和冠状腺辐射等区域的详细轨迹.
  • 该方法在各种样本制备协议和染色方法中显示出一致性,包括古代组织样本.
  • ComSLI成功地可视化了神经退行,显示了硬化和阿尔茨海默病的大脑中海马孔穿孔通路连接的显著损失.

结论:

  • 在微米分辨率下,ComSLI是一种多功能,具有成本效益的技术,用于在任何组织学部分研究复杂的光纤网络.
  • 该方法可以可视化和量化与神经退行相关的神经纤维结构的微妙变化.
  • 康斯利为大规模的连接经济学和神经病理学研究提供了一个强大的新工具.