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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...
Cell-mediated Immune Responses01:40

Cell-mediated Immune Responses

Overview
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 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 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...
Defense Against Bacterial Pathogens01:31

Defense Against Bacterial Pathogens

The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...

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Related Experiment Video

Updated: Jun 24, 2026

An Automated Culture System for Use in Preclinical Testing of Host-Directed Therapies for Tuberculosis
09:34

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Published on: August 16, 2021

Cell-mediated immune responses in tuberculosis.

Andrea M Cooper1

  • 1Trudeau Institute, Saranac Lake, New York 12983, USA. acooper@trudeauinstitute.org

Annual Review of Immunology
|March 24, 2009
PubMed
Summary
This summary is machine-generated.

Tuberculosis lung infection by Mycobacterium tuberculosis (Mtb) is poorly controlled due to slow immune responses. Understanding Mtb's interaction with the lung's immune system is crucial for developing effective tuberculosis vaccines.

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Area of Science:

  • Immunology
  • Infectious Diseases
  • Pulmonology

Background:

  • Tuberculosis (TB) primarily affects the lungs, with dissemination linked to productive infection.
  • Mycobacterium tuberculosis (Mtb) aerosol infection triggers a slow-acting acquired cellular immune response in the lung.
  • This delayed response allows Mtb to establish infection within an already modulated inflammatory environment.

Purpose of the Study:

  • To investigate the factors governing the induction, expression, and regulation of lung immune responses to Mtb.
  • To identify strategies for inducing protective immunity against TB without causing harmful immunopathology.

Main Methods:

  • Analysis of Mtb surface molecule interactions with the innate immune system.
  • Examination of immune response autoregulation mechanisms within the lung.
  • Evaluation of factors mediating immune cell recruitment and function in response to Mtb.

Main Results:

  • Mtb utilizes surface molecules to interact with the innate immune system.
  • Autoregulation mechanisms contribute to suboptimal control of Mtb growth.
  • The slow induction and expression of acquired immunity in the lung favor bacterial proliferation.

Conclusions:

  • Understanding the complex interplay between Mtb and the lung immune environment is essential for improving TB control.
  • Targeting Mtb-host interactions and immune regulation pathways may lead to novel vaccine strategies.
  • Future research should focus on eliciting protective immunity while mitigating immunopathology for effective TB vaccines.