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Related Concept Videos

Pulmonary Tuberculosis IV01:26

Pulmonary Tuberculosis IV

165
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...
165
Pulmonary Tuberculosis V01:28

Pulmonary Tuberculosis V

204
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...
204
Pulmonary Tuberculosis II01:28

Pulmonary Tuberculosis II

269
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...
269
Pulmonary Tuberculosis I01:29

Pulmonary Tuberculosis I

270
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...
270
Pulmonary Tuberculosis III01:31

Pulmonary Tuberculosis III

367
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:
367
Sputum Studies I: Gram Stain, cytology, and Acid-fast smear and culture01:26

Sputum Studies I: Gram Stain, cytology, and Acid-fast smear and culture

238
Sputum studies are a critical part of diagnosing and treating numerous respiratory conditions. These studies involve obtaining sputum samples for analysis to identify pathogenic organisms and assess the presence of abnormal cells indicative of malignant conditions. This lesson will delve into three fundamental sputum studies: Gram Stain, Cytology, and Acid-fast Smear and Culture.
Gram Stain
The Gram Stain is an integral part of sputum studies. It involves the staining of sputum, which permits...
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Imaging Mycobacterium tuberculosis in Mice with Reporter Enzyme Fluorescence
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High resolution imaging and five-year tuberculosis contact outcomes.

Hanif Esmail1,2,3, Anna K Coussens1,4,5, Friedrich Thienemann1,6

  • 1Centre for Infectious Diseases Research in Africa, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Observatory 7925, Republic of South Africa.

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Summary

Subclinical tuberculosis (TB) disease can be detected using PET/CT scans years before symptoms appear. This finding challenges current TB paradigms and suggests new screening strategies for tuberculosis.

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Area of Science:

  • Infectious Diseases
  • Radiology
  • Public Health

Background:

  • The progression of tuberculosis (TB) during its clinical latency phase is not fully understood.
  • Current screening methods for TB may miss early-stage disease.

Conclusions:

  • Subclinical TB lesions are detectable via PET/CT up to four years before microbiological or symptomatic diagnosis.
  • These findings challenge the traditional latent/active TB model.
  • The results have significant implications for improving TB screening and management strategies.