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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...
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...
Pneumonia I: Introduction01:30

Pneumonia I: Introduction

Pneumonia is an acute respiratory infection that targets the lungs, specifically the alveoli. These tiny air sacs, essential for oxygen exchange, become engorged with pus and fluid, severely hindering breathing, decreasing oxygen absorption, and causing significant pain and discomfort during respiration.
Risk Factors
Various factors influence the likelihood of developing pneumonia. Age plays a crucial role, with infants, children under two, and individuals over 65 at increased risk due to their...
Pneumonia I: Introduction01:29

Pneumonia I: Introduction

Pneumonia is an infection of the lower respiratory tract that leads to inflammation of the lung parenchyma, often resulting in the accumulation of inflammatory exudate in the alveoli and airways. Unlike the watery, low-protein fluid exudate in pulmonary edema, the exudate in this case is a thick fluid rich in immune cells, proteins, and debris produced during infection and inflammation.This impairs gas exchange and can lead to consolidation of lung tissue. The infection may be caused by a...

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Updated: Jun 16, 2026

Intratracheal Inoculation of Fischer 344 Rats with Francisella tularensis
06:09

Intratracheal Inoculation of Fischer 344 Rats with Francisella tularensis

Published on: September 30, 2017

Tularemia pneumonia.

Lora D Thomas1, William Schaffner

  • 1Division of Infectious Diseases, Department of Medicine, Vanderbilt University Medical Center, A2200 MCN, 1161 21st Avenue South, Nashville, TN 37232, USA. lora.thomas@vanderbilt.edu

Infectious Disease Clinics of North America
|February 23, 2010
PubMed
Summary
This summary is machine-generated.

Francisella tularensis, a zoonotic bacterium, causes tularemia through various exposures. Type A, the most virulent form, is prevalent in North America and can lead to pneumonia, posing bioterrorism risks.

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Last Updated: Jun 16, 2026

Intratracheal Inoculation of Fischer 344 Rats with Francisella tularensis
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Published on: September 30, 2017

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Published on: April 7, 2015

Area of Science:

  • Infectious Diseases
  • Microbiology
  • Public Health

Background:

  • Francisella tularensis is a Gram-negative bacterium responsible for tularemia.
  • This zoonotic pathogen can be transmitted through arthropod bites, animal contact, or contaminated food and water.
  • Type A, the most virulent subspecies, is primarily found in North America.

Observation:

  • Tularemia presents with diverse clinical manifestations, including ulceroglandular, typhoidal, and pneumonic forms.
  • Pneumonia can arise directly from inhalation or secondary to other tularemia presentations.
  • The bacterium's multiple transmission routes and potential for aerosolization highlight its public health significance.

Findings:

  • This review synthesizes information on the history, epidemiology, diagnosis, and treatment of tularemia.
  • It details the characteristics of Francisella tularensis, emphasizing the virulence of Type A.
  • The potential for F. tularensis as a biological weapon is also discussed.

Implications:

  • Understanding tularemia's transmission and clinical spectrum is crucial for effective disease control.
  • Accurate diagnosis and prompt treatment are essential for managing F. tularensis infections.
  • Awareness of its bioterrorism potential necessitates preparedness and surveillance strategies.