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Related Concept Videos

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 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...
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 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 V01:28

Pulmonary 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...
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: Jun 25, 2026

Analysis of 18FDG PET/CT Imaging as a Tool for Studying Mycobacterium tuberculosis Infection and Treatment in Non-human Primates
10:04

Analysis of 18FDG PET/CT Imaging as a Tool for Studying Mycobacterium tuberculosis Infection and Treatment in Non-human Primates

Published on: September 5, 2017

Tuberculosis and the city.

Andrew Carter1, Alice Zwerling, Sherry Olson

  • 1Montreal Chest Institute, Montreal, Quebec, Canada H2X 2P4.

Health & Place
|February 24, 2009
PubMed
Summary
This summary is machine-generated.

Tuberculosis transmission outside the home, causing "micro-epidemics," is often missed. Contact investigations in Montreal rarely documented non-household locations for contagious tuberculosis patients, suggesting a need for new strategies.

Related Experiment Videos

Last Updated: Jun 25, 2026

Analysis of 18FDG PET/CT Imaging as a Tool for Studying Mycobacterium tuberculosis Infection and Treatment in Non-human Primates
10:04

Analysis of 18FDG PET/CT Imaging as a Tool for Studying Mycobacterium tuberculosis Infection and Treatment in Non-human Primates

Published on: September 5, 2017

Area of Science:

  • Public Health
  • Infectious Disease Epidemiology
  • Tuberculosis Research

Background:

  • Unrecognized tuberculosis (TB) transmission outside the household contributes to "micro-epidemics".
  • Effective contact investigations are crucial for controlling TB spread.
  • Previous strategies may not adequately address TB transmission in diverse urban settings.

Purpose of the Study:

  • To evaluate the frequency of addressing non-household locations in TB contact investigations.
  • To identify patient factors associated with the investigation of external TB transmission sites.
  • To inform potential reevaluation of contact investigation strategies in large cities.

Main Methods:

  • Retrospective review of all reported tuberculosis cases in Montreal, Canada.
  • Data collection covered the period from 1996 to 2004.
  • Analysis focused on documented attendance at non-household locations for contagious TB patients.

Main Results:

  • Investigation of non-household locations was limited in this largely foreign-born patient population.
  • Only 40% of the most contagious TB patients had documented attendance at one non-household location.
  • Findings suggest potential underestimation of external TB transmission routes.

Conclusions:

  • Current TB contact investigation strategies may be insufficient for identifying transmission outside the household in urban environments.
  • Complex social and occupational patterns in large cities necessitate reevaluation of contact tracing methods.
  • Enhanced strategies are needed to address "micro-epidemics" driven by external TB transmission.