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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 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 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 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 19, 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 leprosy in perspective.

Anne C Stone1, Alicia K Wilbur, Jane E Buikstra

  • 1School of Human Evolution and Social Change, Arizona State University, Tempe, AZ 85287, USA. acstone@asu.edu

American Journal of Physical Anthropology
|November 6, 2009
PubMed
Summary
This summary is machine-generated.

Tuberculosis and leprosy, ancient diseases, originated in humans over 35,000 years ago, predating their existence in domestic animals. Molecular genetics research is reshaping our understanding of their origins and global spread.

Related Experiment Videos

Last Updated: Jun 19, 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:

  • Paleopathology
  • Molecular Genetics
  • Evolutionary Biology

Background:

  • Tuberculosis (TB) and leprosy are ancient, devastating diseases with a long history of research.
  • Effective treatments exist, yet they remain global health threats.
  • Mycobacterium tuberculosis and M. leprae are the causative agents, now studied via molecular genetics.

Observation:

  • Paleopathological research has focused on TB and leprosy due to skeletal and mummified remains.
  • Genome-level data has led to phylogenetic analyses questioning previous theories on disease origins.
  • New models suggest human TB predated TB in animals, originating millions of years ago.

Findings:

  • Phylogenetic and biogeographic models challenge established timelines for TB and leprosy.
  • Evidence indicates human TB originated at least 35,000 years ago, possibly 2.6 million years ago.
  • Molecular data supports TB originating in humans before spreading to domestic animals.

Implications:

  • Understanding ancient origins impacts current public health strategies for TB and leprosy.
  • Coevolutionary models offer insights into pathogen-host dynamics.
  • Advances in ancient DNA analysis refine our knowledge of historical disease patterns.