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相关概念视频

Infection01:20

Infection

11.5K
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...
11.5K
Antidotes01:17

Antidotes

961
Antidotes are medicinal substances used to counteract the harmful effects of toxins or drugs in the body. They function in various ways, each uniquely designed to combat specific toxic compounds.
Specific antidotes operate by inhibiting the enzymes that control biochemical pathways, reducing the production of harmful metabolites.
An example of an antidote is atropine, which counteracts the detrimental effects of cholinesterase inhibitors. It achieves this by deactivating muscarinic receptors,...
961
Amnesia01:13

Amnesia

361
Amnesia is a condition marked by long-term memory loss, which impairs the ability to recall past events or create new memories.
The severity and duration of memory loss vary depending on the type and underlying cause. Amnesia is classified into two main types: retrograde and anterograde.
Retrograde amnesia is marked by the loss of memories formed before the onset of the condition. Patients may recall distant past events but often forget those occurring shortly before the incident.
Anterograde...
361
Interference and Decay01:16

Interference and Decay

364
Forgetting is a complex cognitive phenomenon influenced by several factors, among which interference and decay are particularly prominent. These processes explain why individuals often struggle to retrieve specific information from memory, leading to lapses in recall that can be observed in everyday situations.
Interference occurs when competing memories hinder the retrieval of particular information. It can be classified into two types: proactive and retroactive interference. Proactive...
364
Panic Disorder01:27

Panic Disorder

481
Panic disorder is an anxiety disorder characterized by recurrent and sudden minutes-long episodes of intense fear, known as panic attacks. These attacks may feel like heart attacks and often happen without warning or a specific cause. They can include symptoms such as rapid heart rate, shortness of breath, chest pain, trembling, sweating, dizziness, and a sense of helplessness. During a panic attack, individuals may feel as though they are experiencing a heart attack or are in a...
481
Steps in Outbreak Investigation01:18

Steps in Outbreak Investigation

428
In the ever-evolving field of public health, statistical analysis serves as a cornerstone for understanding and managing disease outbreaks. By leveraging various statistical tools, health professionals can predict potential outbreaks, analyze ongoing situations, and devise effective responses to mitigate impact. For that to happen, there are a few possible stages of the analysis:
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相关实验视频

Updated: Dec 25, 2025

Infection
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在与男性发生性关系的年轻男性中,艾滋病毒的患病率和相关风险. 年轻男子调查研究小组研究小组

L A Valleroy1, D A MacKellar, J M Karon

  • 1Division of HIV/AIDS Prevention/NCHSTP, Mailstop E-46, Centers for Disease Control and Prevention, 1600 Clifton Rd NE, Atlanta, GA 30333, USA. lav0@cdc.gov

JAMA
|July 13, 2000
PubMed
概括

美国与男性发生性关系的年轻男性 (MSM) 中,艾滋病毒感染仍然是一个重大问题. 这项研究发现艾滋病毒的高流行率和风险行为,突出了针对这一弱势群体的有针对性的预防工作的迫切需要.

更多相关视频

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01:13

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Last Updated: Dec 25, 2025

Infection
01:20

Infection

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Antidotes
01:17

Antidotes

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Amnesia
01:13

Amnesia

361

科学领域:

  • 流行病学 流行病学
  • 公共卫生 公共卫生
  • 传染性疾病 传染性疾病

背景情况:

  • 20世纪80年代后期的研究表明,艾滋病毒流行病在老年MSM中达到顶峰.
  • 最近的研究表明,在年轻的MSM中,艾滋病毒发病率仍然很高.

研究的目的:

  • 评估美国大都市地区青少年和年轻成年MSM当前艾滋病毒感染的患病率和相关风险.

主要方法:

  • 年轻人调查 (1994-1998) 是一个横截面的,以场所为基础的调查.
  • 包括3492名15-22岁的MSM在美国七个主要大都市地区.
  • 通过采访和艾滋病毒检测收集的数据.

主要成果:

  • 总体艾滋病毒感染率为7.2%,随着年龄的增长而增加.
  • 在黑人,西班牙裔和混合种族MSM中观察到更高的患病率.
  • 关键的危险因素包括种族/种族,交史和多个性伴侣.
  • 不受保护的交的高患病率 (41%) 和对艾滋病毒状况的认识低.

结论:

  • 年轻MSM中艾滋病毒的高流行率需要加强预防策略.
  • 针对性的干预对黑人,西班牙裔,混合种族和青少年MSM至关重要.
  • 解决风险行为和提高艾滋病毒状况意识至关重要.