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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.
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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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基础科学和病原发生学

Rachel M Keszycki1,2,3, Ivan Ayala1,3, Antonia Zouridakis1,3

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此摘要是机器生成的。

初级渐进性失言症 (PPA) 显示出明显的杏仁核脆弱性. 基底核具有最多的神经元损失和病理,在3R和4R物种中观察到差异.

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科学领域:

  • 神经科学是一个神经科学.
  • 神经病理学神经病理学
  • 痴呆症研究 痴呆症研究

背景情况:

  • 初级渐进性失言症 (PPA) 是一种语言障碍,通常与前叶退化与tau病理 (FTLD-tau) 相关.
  • 杏仁体是情绪和记忆的关键大脑区域,在神经退行性疾病中表现出不同的脆弱性.
  • 这项研究研究了不同tau物种 (3R vs. 4R FTLD-tau) 引起的PPA如何影响特定的杏仁核.

研究的目的:

  • 为了研究PPA中杏仁核中的病原体的独特模式.
  • 为了区分3R和4R物种对PPA中杏仁核的影响.
  • 探索杏仁体在PPA发病过程中的作用.

主要方法:

  • 分析了尸检确认的PPA病例 (3R和4R FTLD-tau) 和对照病例.
  • 杏仁体部分被染色为神经元和化 (AT-8).
  • 在特定的杏仁核中进行了神经元和含物的立体量化和免疫性数字分析.

主要成果:

  • 基底核显示显著的神经元损失和PPA病例中最高的tau病理.
  • 与4R tau相比,具有3R tau的PPA表现出更广泛的tau积累和侧核神经元损失.
  • 带有4R的PPA显示出更大的质积,特别是在中央核中,以及病理的左向不对称性.

结论:

  • 杏仁核在PPA中显示出与FTLD-tau相关的明显漏洞.
  • 在PPA中,基底核始终受到神经元损失和病理的影响.
  • 不同的tau物种 (3R与4R) 导致杏仁体内独特的病理模式,包括半球不对称.