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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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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
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
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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

Jerry Jierui Lou1, Peter Chang1, Kiana D Nava2

  • 1University of California, Irvine, School of Medicine, Irvine, CA, USA.

Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 24, 2025
PubMed
概括
此摘要是机器生成的。

本研究引入了一种机器学习 (ML) 算法,用于自动化大脑动脉样硬化评估,比手工方法提高准确性和效率. 艺术和网站工具提供了一个有前途的方法,以完整的幻灯片图像来增强血管病理的分析.

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相关实验视频

Last Updated: Jan 8, 2026

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Published on: June 14, 2020

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科学领域:

  • 神经病理学神经病理学
  • 计算病理学计算病理学
  • 医学成像分析 医学成像分析

背景情况:

  • 目前的大脑动脉样硬化症的评估依赖于手动组织学检查的主观,半定量尺度.
  • 手动方法表现出有限的评价者间可靠性,缺乏精确的定量指标.
  • 区域特定的高分辨率分析通常是手动不切实际的.

研究的目的:

  • 开发和验证基于机器学习 (ML) 的算法,用于动脉缩性血管的自动形态测量分析.
  • 引入动脉样硬化细分 (ArtS) 和硬化指数和厚度提取器 (SITE) 用于对整个幻灯片图像 (WSI) 的定量评估.

主要方法:

  • 来自三个大脑银行的数字化血素和素染色大脑WSIs.
  • 在ArtS中训练了三个ML模型,用于血管检测,动脉样硬化分类和血管壁/光层细分.
  • 利用SITE工具从细分的血管中提取硬化指数和壁厚.

主要成果:

  • 在血管检测 (AUC-ROC高达0.79) 和动脉样硬化症分类 (精度高达0.94) 方面,ArtS表现强.
  • 动脉样硬化血管细分实现了达斯得分高达0.73和AUC-ROC高达0.92.
  • 网站成功计算了与专家评估可比的定量指标.

结论:

  • ArtS和SITE算法显示了对动脉样硬化症的定量形态测量分析的巨大潜力.
  • 这些ML工具可以增强目前针对血管病理的基于人类的评估方法.
  • 进一步优化可能会导致神经病理学家有价值的辅助工具.