関連する実験動画
Updated: Jul 12, 2026
09:03
Growth of Mycobacterium tuberculosis Biofilms
Published on: February 15, 2012
潜伏感染中に表面的に正常な肺組織にMycobacterium tuberculosisのDNAが持続する
R Hernández-Pando1, M Jeyanathan, G Mengistu
1Department of Pathology, Instituto Nacional de la Nutrición Salvador Zubirán, Mexico City, Mexico.
Lancet (London, England)
|February 24, 2001
まとめ
潜伏性Mycobacterium tuberculosisは,活発な結核病変がない場合でも,マクロファージやその他の非ファゴシート細胞を含む肺細胞内に持続することができます. この発見は,持続的な結核バチリを除去するための戦略に影響を与えます.
科学分野:
- 微生物学 微生物学とは
- 免疫学 免疫学とは
- 肺内科 肺内科 肺内科
背景:
- 世界の人口の3分の1が,ミコバクテリア結核感染症の潜在感染者を抱えている.
- 潜伏性結核バチルの再活性化は,低流行地域における活性疾患の主な原因である.
- 潜伏バチリの細胞位置を理解することは,排除戦略の開発に不可欠です.
研究 の 目的:
- 肺組織内の潜伏しているMycobacterium tuberculosis生物の細胞位置を決定する.
- 潜伏性結核バチリを宿すかもしれない非マクロファージ細胞を特定するために.
主な方法:
- 局所PCRと従来のPCRは,マクロスコーピ的に正常な肺組織に適用されました.
- エチオピアとメキシコの個人から採取したサンプルを分析し,ノルウェーの個人をネガティブ・コントロールとして用いた.
- 陽性対照群には,エチオピアの結核患者からの肺組織が含まれていた.
主要な成果:
- 局所PCRにより,エチオピア (5/13) とメキシコ (10/34) の個体からマクロスコピ的に正常な肺組織でMycobacterium tuberculosis DNAが検出されました.
- 従来のPCRは,これらの発見を確認した.
- 特定された陽性細胞には,アルベオラおよびインタースティシャルマクロファージ,II型肺細胞,内皮細胞,および線維芽細胞が含まれています.
結論:
- Mycobacterium tuberculosisは,明らかな結核病変なしに肺組織に細胞内的に持続することができます.
- 潜伏バチリは,マクロファージと非プロフェッショナルなファゴサイト細胞の両方で存在します.
- これらの発見は,古い結核病変にのみ存在する潜伏バチルの伝統的な見解に異議を唱え,将来の除去戦略に影響を与えます.
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関連する概念動画
01:29Pulmonary Tuberculosis I
Tuberculosis, often called TB, is a contagious illness primarily caused by Mycobacterium tuberculosis. It mainly affects the lung parenchyma but can also impact other body parts.
Causative Organism
The primary infectious agent causing tuberculosis is Mycobacterium tuberculosis, a slow-growing, acid-fast, aerobic rod that exhibits sensitivity to heat and ultraviolet light. Instances of Mycobacterium bovis and Mycobacterium avium contributing to the development of TB infection are rare.
Mode of...
Causative Organism
The primary infectious agent causing tuberculosis is Mycobacterium tuberculosis, a slow-growing, acid-fast, aerobic rod that exhibits sensitivity to heat and ultraviolet light. Instances of Mycobacterium bovis and Mycobacterium avium contributing to the development of TB infection are rare.
Mode of...
01:28Pulmonary Tuberculosis II
Tuberculosis, or TB, is a bacterial infectious disease caused by Mycobacterium tuberculosis. While its primary impact is on the lungs, leading to pulmonary tuberculosis, it can also affect various other organs, a condition referred to as extrapulmonary tuberculosis.
Here is a detailed explanation of its pathophysiology:
Transmission: The process begins when a person inhales droplet nuclei containing M. tuberculosis. These are typically released into the air when an individual with pulmonary or...
Here is a detailed explanation of its pathophysiology:
Transmission: The process begins when a person inhales droplet nuclei containing M. tuberculosis. These are typically released into the air when an individual with pulmonary or...
01:31Pulmonary Tuberculosis III
Tuberculosis (TB) is a contagious infection primarily affecting the lung parenchyma but which can also affect other body parts. TB can be classified based on disease development, presentation, and the affected anatomical site.
The first classification is based on the development of the disease, and it includes the following categories:
The first classification is based on the development of the disease, and it includes the following categories:
01:26Pulmonary Tuberculosis IV
Tuberculosis, more commonly referred to as TB, is an infectious disease stemming from Mycobacterium tuberculosis. While it primarily impacts the lungs, TB can also affect other body areas. Given its severity and global impact, timely and accurate diagnosis is crucial for controlling its spread and improving patient outcomes.
Several diagnostic approaches are used to detect TB. The conventional method is the Tuberculin Skin Test (TST), also known as the Mantoux test. However, this method has...
Several diagnostic approaches are used to detect TB. The conventional method is the Tuberculin Skin Test (TST), also known as the Mantoux test. However, this method has...
01:28Pulmonary Tuberculosis V
Medical management of tuberculosis (TB) patients involves a comprehensive approach that includes diagnosis, treatment, and monitoring. The specific strategies can vary depending on the type of tuberculosis (latent or active), the patient's overall health status, and other considerations.
Latent tuberculosis infection occurs when TB bacteria are present in a person's body, but are not causing illness or symptoms. It is not contagious, and preventive treatment is crucial to avoid the progression...
Latent tuberculosis infection occurs when TB bacteria are present in a person's body, but are not causing illness or symptoms. It is not contagious, and preventive treatment is crucial to avoid the progression...
01:23Tuberculosis
Tuberculosis (TB) remains a significant global health concern, primarily targeting the lungs and spreading through airborne transmission. Infection begins when aerosolized droplet nuclei, expelled by an individual with active TB, are inhaled by another person. These microscopic particles carry Mycobacterium tuberculosis, the causative agent of TB. Upon reaching the alveoli, the bacilli are engulfed by alveolar macrophages. However, due to their specialized lipid-rich cell wall, these pathogens...