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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

Urinary Tract Infection II: Pathophysiology

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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: Pathogenesis01:23

Cystic Fibrosis: Pathogenesis

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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.
CF is primarily caused by a genetic mutation in a chromosome 7 gene coding for the cystic fibrosis transmembrane conductance regulator (CFTR) protein. The most common gene mutation leading to CF is the ΔF508 mutation,...
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The pathophysiology of pneumonia involves the following steps:
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Stages of Infection01:26

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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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Defense Against Bacterial Pathogens01:31

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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.
Phagocytes
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Mouse Footpad Inoculation Model to Study Viral-Induced Neuroinflammatory Responses
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基础科学和病原发生学

Yifei Ren1,2,3,4, Xiaodong Han5, Lin Song1,2,3

  • 1Department of Neurology, Shandong Provincial Hospital, Shandong University, Jinan, Shandong, China.

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概括
此摘要是机器生成的。

老年人的多病症与大脑缩和隐藏的血管大脑损伤 (VBI) 有关. 这些变化包括灰色和白质量减少以及小血管疾病标志物增加.

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科学领域:

  • 神经学 神经学
  • 老年学是一门学科.
  • 放射学 放射学是一门学科.

背景情况:

  • 多病症对老年人群大脑结构和隐性血管大脑损伤 (VBI) 的影响尚不清楚.
  • 了解这些关联对于开发针对老年人认知健康的有针对性的干预措施至关重要.

研究的目的:

  • 调查老年人多病症,大脑结构变化和隐性VBI之间的关系.
  • 为了确定与大脑变化相关的多病症的特定模式.

主要方法:

  • 一项以人口为基础的研究,涉及1,264名60岁及以上的没有痴呆症的参与者.
  • 使用等级分类来定义来自23种慢性疾病的多病症集群.
  • 大脑MRI被用来评估全球和区域的大脑体积,以及VBI的标志物,包括缺口,大脑微型血流,扩大的周血管空间和白质超强度.

主要成果:

  • 多种疾病与灰质体积 (GMV) 和白质体积 (WMV) 的减少以及脑脊液 (CSF) 的增加有关.
  • 在AD相关的大脑区域的多病症和缩之间发现了显著的关联,例如先和状.
  • 在多病症患者中观察到VBI标志物的增加,包括缺口,大脑微型出血和白质超强度.

结论:

  • 具有多病症的老年人的结构性大脑变化具有全球大脑缩的特征.
  • 这些变化包括与阿尔茨海默病相关的大脑区域的缩以及隐藏的血管大脑损伤的存在.
  • 特定的多病症集群,如代谢和心肌骨,与大脑缩和VBI标志物有显著的关系.