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Related Concept Videos

Pulmonary Tuberculosis III01:31

Pulmonary Tuberculosis III

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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:
312
Pulmonary Tuberculosis IV01:26

Pulmonary Tuberculosis IV

134
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...
134
Pulmonary Tuberculosis II01:28

Pulmonary Tuberculosis II

213
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...
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Pulmonary Tuberculosis V01:28

Pulmonary Tuberculosis V

172
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...
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Pulmonary Tuberculosis I01:29

Pulmonary Tuberculosis I

224
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...
224
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

168
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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Related Experiment Video

Updated: Jun 12, 2025

Analysis of 18FDG PET/CT Imaging as a Tool for Studying Mycobacterium tuberculosis Infection and Treatment in Non-human Primates
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Knee tuberculosis: an overlooked clinical entity.

Ran Cui1, Qing Huang1, Sheng-Ming Dai1

  • 1Department of Rheumatology and Immunology, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.

Journal of Infection in Developing Countries
|September 17, 2024
PubMed
Summary
This summary is machine-generated.

Tuberculous knee arthritis can present insidiously, mimicking other conditions like PVNS. Early consideration of Mycobacterium tuberculosis infection is crucial for accurate diagnosis and treatment of chronic knee arthritis.

Keywords:
PCRkneepigmented villonodular synovitispolymerase chain reactiontuberculosis

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Area of Science:

  • Orthopedics
  • Infectious Diseases
  • Radiology

Background:

  • Extrapulmonary tuberculosis commonly affects lymph nodes, pleura, bones, joints, urogenital tract, and meninges.
  • Tuberculous arthritis poses diagnostic challenges due to atypical presentations and non-specific imaging.
  • Early diagnosis is often delayed by insidious clinical manifestations.

Observation:

  • A 59-year-old male experienced two months of progressive left knee swelling post-total knee arthroplasty.
  • Initial misdiagnosis as pigmented villonodular synovitis (PVNS) occurred.
  • Persistent symptoms despite previous knee surgery prompted further investigation.

Findings:

  • Radiological (X-ray, MRI, CT) and laboratory (interferon-γ release assay - IGRA) assessments suggested tuberculous knee arthritis.
  • Polymerase chain reaction (PCR) detected Mycobacterium tuberculosis (MTB) DNA in synovial fluid.
  • A positive IGRA result supported the diagnosis of tuberculous arthritis.

Implications:

  • Highlights the importance of including Mycobacterium tuberculosis in the differential diagnosis of chronic unilateral knee arthritis.
  • Emphasizes considering tuberculous arthritis even with atypical presentations mimicking conditions like PVNS.
  • Underscores the need for advanced diagnostic tools like PCR and IGRA for definitive diagnosis.