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Related Concept Videos

Pulmonary Tuberculosis I01:29

Pulmonary 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...
Other Pulmonary Disorders01:17

Other Pulmonary Disorders

Respiratory disorders encompass a range of conditions with varying levels of severity. Asthma, marked by chronic airway inflammation and hypersensitivity, is one such condition. It can lead to airway obstruction due to factors like bronchial spasms, mucosal edema, increased mucus secretion, or epithelial damage. Asthma triggers are diverse, ranging from allergens to emotional upset, and treatment focuses on both immediate relief through bronchodilators and long-term inflammation suppression.
Tuberculosis01:23

Tuberculosis

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...
Pulmonary Tuberculosis III01:31

Pulmonary 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:
Pulmonary Tuberculosis II01:28

Pulmonary 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...
Pulmonary Tuberculosis IV01:26

Pulmonary 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...

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Related Experiment Video

Updated: Jul 15, 2026

A Silicosis Mouse Model Established by Repeated Inhalation of Crystalline Silica Dust
10:45

A Silicosis Mouse Model Established by Repeated Inhalation of Crystalline Silica Dust

Published on: January 6, 2023

Silica, silicosis and tuberculosis.

D Rees1, J Murray

  • 1National Institute for Occupational Health, Johannesburg, South Africa.

The International Journal of Tuberculosis and Lung Disease : the Official Journal of the International Union Against Tuberculosis and Lung Disease
|April 19, 2007
PubMed
Summary

Crystalline silica exposure causes silicosis and tuberculosis (TB), especially in low-income nations. Effective dust control and early detection are crucial for managing these persistent occupational health threats.

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Establishing a Silicosis Rat Model via Exposure of Whole-Body to Respirable Silica
05:03

Establishing a Silicosis Rat Model via Exposure of Whole-Body to Respirable Silica

Published on: October 28, 2022

Related Experiment Videos

Last Updated: Jul 15, 2026

A Silicosis Mouse Model Established by Repeated Inhalation of Crystalline Silica Dust
10:45

A Silicosis Mouse Model Established by Repeated Inhalation of Crystalline Silica Dust

Published on: January 6, 2023

Establishing a Silicosis Rat Model via Exposure of Whole-Body to Respirable Silica
05:03

Establishing a Silicosis Rat Model via Exposure of Whole-Body to Respirable Silica

Published on: October 28, 2022

Area of Science:

  • Occupational Health
  • Pulmonology
  • Infectious Diseases

Background:

  • Crystalline silica exposure leads to serious diseases like silicosis and tuberculosis (TB).
  • Silica-related TB is worsened by the HIV epidemic in low-income countries.
  • Silicosis continues to affect individuals, including young people, despite efforts to reduce dust exposure.

Purpose of the Study:

  • To review the morphology and sources of crystalline silica.
  • To discuss the prevalence, clinical features, and diagnosis of silicosis.
  • To highlight the increased risk of mycobacterial infections in silica-exposed individuals and management strategies.

Main Methods:

  • Review of existing literature on crystalline silica, silicosis, and associated TB.
  • Emphasis on diagnostic methods, particularly chest radiography for silicosis.
  • Discussion of control, treatment, and surveillance strategies for silica-associated diseases.

Main Results:

  • Silica dust exposure presents variable potency and diverse sources, including mining and agriculture.
  • Silicosis diagnosis relies on clinical and pathological features, with chest radiography being key.
  • Silica-exposed individuals face a high risk of mycobacterial infections, necessitating proactive management and latent TB treatment.

Conclusions:

  • Silicosis and silica-associated TB remain significant global occupational health concerns.
  • Effective dust control, early disease detection, and workplace surveillance are vital.
  • Clinicians must remain vigilant for silica-associated diseases, which will persist for years.