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Infection01:20

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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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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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基础科学和病原发生学

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南卡罗来纳州的早期阿尔茨海默病 (AD) 和前叶退行症 (FTLD) 的发病率高于全国平均水平. 神经病理学研究显示,特定的神经退行性疾病在某些州区域聚集.

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科学领域:

  • 神经病理学神经病理学
  • 神经退行性疾病 神经退行性疾病
  • 公共卫生流行病学 流行病学

背景情况:

  • 南卡罗来纳州的阿尔茨海默病 (AD) 和相关痴呆症 (ADRD) 患病率很高,影响超过122,000人.
  • 地理地图显示痴呆病例分布不均,表明了特定的痴呆病例.

研究的目的:

  • 通过神经病理学检查,确定南卡罗来纳州痴呆症的原因.
  • 确定不同类型的ADRD的患病率,并将其与国家平均值进行比较.
  • 在该州内调查特定神经退行性疾病的地理聚类.

主要方法:

  • 对343例死后脑病例进行了详细的组织学检查.
  • 使用了一组包括H&E,Bielschowsky和关键蛋白质 (Abeta,tau,alpha-synuclein,p62,p-TDP43) 的免疫蛋白质在内的染色板.
  • 诊断被映射到邮政编码级别,并由经过认证的神经病理学家审查.

主要成果:

  • 43.1%的病例患有AD,20.3%是早期发病 (高于典型的5-10%).
  • 前叶退化 (FTLD) -tau (63.6%) 和FTLD-TDP (26.4%) 的发病率比平时更高.
  • 多重系统缩的发生率更高;纯粹的AD并不常见,大多数AD病例与其他神经退行性疾病同时发生. 观察到诊断的地理聚类.

结论:

  • 南卡罗来纳州显示,早期发病的AD和FTLD-tau.的代表性较高.
  • 特定的神经退行性疾病在该州的特定地理区域中表现为集群.
  • 目前正在进行的全基因组测序旨在识别导致这些观察到的诊断模式的遗传变异.