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Related Concept Videos

Pulmonary Tuberculosis I01:29

Pulmonary Tuberculosis I

1.0K
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...
1.0K
Pulmonary Tuberculosis II01:28

Pulmonary Tuberculosis II

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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...
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Pulmonary Tuberculosis III01:31

Pulmonary Tuberculosis III

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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:
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Pulmonary Tuberculosis IV01:26

Pulmonary Tuberculosis IV

557
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...
557
Factors Affecting the Risk of Infection01:26

Factors Affecting the Risk of Infection

13.9K
The hosts' susceptibility to infection depends on several factors. The integrity of the skin and mucous membranes helps protect the body against microbial attacks. When the skin is altered, the chance of infection, limb loss, and even death increases.
The integrity and count of the white blood cells help the body resist pathogens and fight infection. When impaired, it reduces the body's resistance to pathogens. The acidic pH levels of the gastrointestinal, genitourinary tracts, and skin...
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Pulmonary Tuberculosis V01:28

Pulmonary Tuberculosis V

656
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...
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An Automated Culture System for Use in Preclinical Testing of Host-Directed Therapies for Tuberculosis
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An Automated Culture System for Use in Preclinical Testing of Host-Directed Therapies for Tuberculosis

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Tuberculosis Infectiousness and Host Susceptibility.

Richard D Turner1, Christopher Chiu2, Gavin J Churchyard3,4

  • 1Department of Respiratory Medicine, King's College Hospital.

The Journal of Infectious Diseases
|November 8, 2017
PubMed
Summary
This summary is machine-generated.

Tuberculosis transmission involves Mycobacterium tuberculosis aerosol release from infected individuals and survival in the environment. Host defenses determine new infection, but research is limited by few models and direct measurement challenges.

Keywords:
Tuberculosisinfectiousnesssusceptibilitytransmission

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Area of Science:

  • Microbiology
  • Epidemiology
  • Immunology

Background:

  • Tuberculosis (TB) transmission is a complex process involving multiple stages.
  • Understanding these stages is crucial for effective TB control strategies.

Purpose of the Study:

  • To provide an overview of the key steps in tuberculosis transmission.
  • To identify existing gaps in knowledge regarding TB transmission dynamics.

Main Methods:

  • This review synthesizes current knowledge on tuberculosis transmission.
  • It examines factors influencing Mycobacterium tuberculosis aerosol generation, survival, and inhalation.
  • Host immune responses influencing infection establishment are also discussed.

Main Results:

  • Successful TB transmission requires a source case with infectious respiratory disease, aerosolization of viable Mycobacterium tuberculosis, and survival of bacilli in the environment.
  • Inhalation by a new host is followed by the influence of innate and adaptive host defenses on infection outcome.
  • Significant knowledge gaps exist, particularly in studying the infection process directly due to limited animal models and measurement techniques.

Conclusions:

  • The transmission of tuberculosis is a multifaceted process with several critical, yet poorly understood, steps.
  • Further research is needed to address the identified knowledge gaps, particularly concerning host-pathogen interactions and environmental survival of Mycobacterium tuberculosis.