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Related Concept Videos

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...
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...
Atypical Pneumonia01:14

Atypical Pneumonia

Atypical pneumonia, often caused by Mycoplasma pneumoniae, is a form of pulmonary infection that differs from the classical presentation of bacterial pneumonia in both its cause and clinical symptoms. Mycoplasma pneumoniae is a pleomorphic bacterium notable for its lack of a rigid cell wall. This structural characteristic imparts resistance to beta-lactam antibiotics and significantly influences the bacterium’s behavior within the human host.Other pathogens responsible for the disease include...
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: Jul 16, 2026

Intradermal Inoculation of Mycobacterium avium in the Mouse Ear
09:20

Intradermal Inoculation of Mycobacterium avium in the Mouse Ear

Published on: July 3, 2025

[Nontuberculous mycobacterial lymphadenitis].

A Méndez Echevarría1, F Baquero Artigao, M J García Miguel

  • 1Unidad de Infectología Pediátrica, Hospital Infantil La Paz, Madrid, España. amendezes@yahoo.es

Anales De Pediatria (Barcelona, Spain : 2003)
|March 14, 2007
PubMed
Summary

Nontuberculous mycobacterial lymphadenitis (NTML) cases increased significantly since 1996. Surgical excision was the most effective treatment, with a 0% failure rate, while antibiotics and drainage showed higher failure rates.

Related Experiment Videos

Last Updated: Jul 16, 2026

Intradermal Inoculation of Mycobacterium avium in the Mouse Ear
09:20

Intradermal Inoculation of Mycobacterium avium in the Mouse Ear

Published on: July 3, 2025

Area of Science:

  • Pediatric Infectious Diseases
  • Microbiology
  • Immunology

Context:

  • Nontuberculous mycobacterial lymphadenitis (NTML) is an emerging infection in children.
  • Diagnosis can be challenging due to limitations of traditional methods like Mantoux testing.
  • Epidemiological shifts show an increase in NTML coinciding with a decrease in tuberculous adenitis.

Purpose:

  • To investigate the clinical features, epidemiology, and outcomes of NTML in pediatric patients.
  • To evaluate the diagnostic accuracy of various tests, including PCR and skin tests.
  • To compare the effectiveness of different treatment modalities for NTML.

Summary:

  • A retrospective study of 54 pediatric patients (1987-2004) with NTML.
  • Mycobacterium avium was the most common pathogen (61%).
  • Surgical excision demonstrated a 100% success rate, contrasting with higher failure rates for antibiotic therapy (38%) and drainage alone (77%).

Impact:

  • Highlights the increasing prevalence of NTML in pediatric populations.
  • Underscores the diagnostic challenges and the need for reliable diagnostic tools.
  • Provides evidence supporting surgical excision as the primary treatment for NTML, with pharmacological options for specific cases.