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Related Concept Videos

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...
Pneumonia III: Complications and Assessment01:30

Pneumonia III: Complications and Assessment

Pneumonia poses the potential for numerous complications that warrant consideration. These complications include the following:
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...
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 II: Pathophysiology01:29

Pneumonia II: Pathophysiology

The pathophysiology of pneumonia involves the following steps:
Pneumothorax II: Pathophysiology01:08

Pneumothorax II: Pathophysiology

Pneumothorax means the presence of air in the pleural space — the thin potential gap between the visceral and parietal pleura. This condition disrupts the normal pressure balance that keeps the lungs inflated, leading to partial or complete collapse of the affected lung.Normal physiologyUnder normal conditions, the pleural space maintains a slightly negative intrapleural pressure, which keeps the lungs expanded against the chest wall. This negative pressure creates a delicate balance between...

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Related Experiment Video

Updated: Jun 4, 2026

Visualization of Streptococcus pneumoniae within Cardiac Microlesions and Subsequent Cardiac Remodeling
08:25

Visualization of Streptococcus pneumoniae within Cardiac Microlesions and Subsequent Cardiac Remodeling

Published on: April 7, 2015

Pneumococcal aortitis: an insidious diagnosis.

P G Postema1, D A Legemate, D L P Baeten

  • 1Department of Internal Medicine, Academic Medical Center, Amsterdam, the Netherlands. p.g.postema@amc.uva.nl

The Netherlands Journal of Medicine
|February 18, 2011
PubMed
Summary
This summary is machine-generated.

Streptococcus pneumoniae aortitis, an infection of the aorta, often presents with vague symptoms like fever and back pain, leading to diagnostic delays. This rare condition carries a high mortality rate, especially when near critical structures like renal arteries.

Related Experiment Videos

Last Updated: Jun 4, 2026

Visualization of Streptococcus pneumoniae within Cardiac Microlesions and Subsequent Cardiac Remodeling
08:25

Visualization of Streptococcus pneumoniae within Cardiac Microlesions and Subsequent Cardiac Remodeling

Published on: April 7, 2015

Area of Science:

  • Infectious diseases
  • Cardiovascular medicine
  • Vascular surgery

Background:

  • Infectious arteritis of large vessels is a rare but serious condition.
  • Prompt diagnosis and treatment are crucial for patient outcomes.

Observation:

  • A case of Streptococcus pneumoniae aortitis is presented.
  • Nonspecific symptoms (fever, back pain) caused a significant diagnostic delay.
  • Aortitis location near renal arteries complicated surgical intervention.

Findings:

  • Despite emergency surgery for aortic rupture, the patient did not survive.
  • Infectious arteritis is frequently diagnosed late in its progression.
  • High mortality is associated with infectious arteritis of large vessels.

Implications:

  • Highlights the challenges in diagnosing infectious aortitis due to nonspecific symptoms.
  • Emphasizes the critical need for early recognition and intervention in infectious arteritis.
  • Underscores the poor prognosis associated with delayed diagnosis and treatment of large vessel infections.