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Related Concept Videos

Pulmonary Tuberculosis V01:28

Pulmonary Tuberculosis V

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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

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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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Pulmonary Tuberculosis IV01:26

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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.
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Pulmonary Tuberculosis III01:31

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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:
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Pulmonary Tuberculosis II01:28

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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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Transmission-based Precautions I: Contact, Enteric, and Droplets01:17

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Transmission-based precautions are for patients known to be infected or suspected to be infected or colonized with organisms that pose a significant risk to others. Some transmission-based precautions include contact, enteric, and droplet.
Contact Precautions:
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Related Experiment Video

Updated: May 3, 2026

Analysis of 18FDG PET/CT Imaging as a Tool for Studying Mycobacterium tuberculosis Infection and Treatment in Non-human Primates
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Tuberculosis: which patients do not identify their contacts?

J Josaphat1, J Gomes Dias2, S Salvador1

  • 1Department of Clinical Epidemiology, Predictive Medicine and Public Health, Faculty of Medicine, University of Porto, Porto, Portugal.

Revista Portuguesa De Pneumologia
|February 12, 2014
PubMed
Summary
This summary is machine-generated.

Tuberculosis patients often fail to identify all at-risk contacts, particularly those from their workplace. Identifying employment as a key factor in missed tuberculosis (TB) cases is crucial for public health.

Keywords:
Contact identificationIdentificação de contactosInvestigation of contactsInvestigação de contactosRastreioScreeningTuberculoseTuberculosis

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Area of Science:

  • Public Health
  • Infectious Disease Epidemiology
  • Tuberculosis Control

Background:

  • The magnitude and reasons for non-identification of tuberculosis (TB) contacts remain largely unknown in many regions.
  • Effective contact tracing is essential for TB control and preventing further transmission.
  • Understanding determinants of missed contacts can improve public health strategies.

Purpose of the Study:

  • To analyze the factors associated with the failure to identify tuberculosis (TB) contacts.
  • To determine the characteristics of unidentified TB contacts and their implications for disease spread.

Main Methods:

  • A cross-sectional study was conducted involving pulmonary tuberculosis cases and their contacts treated at a Chest Disease Centre.
  • Data were collected from index TB patients regarding contact identification and from Public Health Unit visits.
  • Statistical analysis, including multivariate analysis, was used to identify determinants of non-identification.

Main Results:

  • Over 32% of pulmonary tuberculosis cases did not identify all their contacts.
  • Public Health Unit identification yielded a higher proportion of contacts with latent TB infection (LTBI) or active TB compared to index case identification.
  • Employment was significantly associated with the non-identification of TB contacts (adjusted OR=4.82), while patients preferentially identified relatives and co-habitants (adjusted OR=0.22).

Conclusions:

  • Tuberculosis patients are more likely to identify household members and relatives, neglecting other social and occupational contacts.
  • Contact at the place of employment emerged as a significant independent risk factor for contacts not being identified.
  • Targeted strategies are needed to improve the identification of occupational contacts to enhance TB case finding and control.