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Related Concept Videos

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...
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...
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 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...

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Related Experiment Video

Updated: Jun 19, 2026

An In Vitro Caseum Binding Assay that Predicts Drug Penetration in Tuberculosis Lesions
12:17

An In Vitro Caseum Binding Assay that Predicts Drug Penetration in Tuberculosis Lesions

Published on: May 8, 2017

INTRAPERITONEAL LYSIS OF TUBERCLE BACILLI.

W H Manwaring1, J Bronfenbrenner

  • 1Laboratories of The Rockefeller Institute for Medical Research, New York.

The Journal of Experimental Medicine
|October 30, 2009
PubMed
Summary

Tuberculosis infection causes tubercle bacilli to rapidly disappear from peritoneal fluids in infected animals, unlike in healthy controls. This clearance involves bacilli adhering to leukocytes and lysis by peritoneal cells.

Area of Science:

  • Immunology
  • Microbiology
  • Pathology

Background:

  • Tuberculosis is a significant global health concern.
  • Understanding the host-pathogen interaction in tuberculosis is crucial for developing effective treatments.

Purpose of the Study:

  • To investigate the fate of tubercle bacilli injected into the peritoneal cavity of tuberculous animals.
  • To elucidate the mechanisms responsible for the clearance of tubercle bacilli from peritoneal fluids.

Main Methods:

  • Injection of tubercle bacilli into the peritoneal cavities of various animal models (guinea pigs, rats, rabbits, dogs, monkeys), some of which were experimentally infected with tuberculosis.
  • Quantitative recovery of bacilli from peritoneal fluids at different time points.
  • In vitro studies using isolated peritoneal tissues and fluids to assess bacillary destruction.

More Related Videos

Preparation of Mycobacterium tuberculosis Culture Filtrate to Understand TB Pathogenesis
07:32

Preparation of Mycobacterium tuberculosis Culture Filtrate to Understand TB Pathogenesis

Published on: March 28, 2025

Related Experiment Videos

Last Updated: Jun 19, 2026

An In Vitro Caseum Binding Assay that Predicts Drug Penetration in Tuberculosis Lesions
12:17

An In Vitro Caseum Binding Assay that Predicts Drug Penetration in Tuberculosis Lesions

Published on: May 8, 2017

Preparation of Mycobacterium tuberculosis Culture Filtrate to Understand TB Pathogenesis
07:32

Preparation of Mycobacterium tuberculosis Culture Filtrate to Understand TB Pathogenesis

Published on: March 28, 2025

Main Results:

  • Tubercle bacilli rapidly disappeared from peritoneal fluids of tuberculous animals but persisted in normal controls.
  • Bacilli adhered to peritoneal leukocytes, which then fixed to the omentum.
  • Significant reduction in recoverable bacilli in tuberculous animals compared to controls within 1.5-2 hours.
  • Isolated peritoneal tissues from tuberculous animals demonstrated in vitro destruction of tubercle bacilli.
  • Evidence of bacillary lysis within the peritoneal cavity, attributed to specific changes in fixed peritoneal cells, not circulating fluids.

Conclusions:

  • Tuberculous animals exhibit enhanced clearance of tubercle bacilli from the peritoneal cavity.
  • This clearance involves both cellular adhesion and active lysis mediated by peritoneal cells.
  • The findings suggest specific cellular changes in tuberculous hosts contribute to bacillary destruction.