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Related Concept Videos

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...
Viral Meningitis01:18

Viral Meningitis

Viral meningitis is the most common form of meningitis and is often referred to as aseptic meningitis to indicate the absence of bacterial involvement. It is generally milder than bacterial meningitis, with symptoms including fever, headache, stiff neck, drowsiness, nausea, photophobia, and vomiting. Rarely, more severe manifestations or death may occur. Common causative agents include enteroviruses, particularly coxsackie A and B viruses and echoviruses, all members of the Enterovirus genus...
Pneumonia II: Pathophysiology01:29

Pneumonia II: Pathophysiology

The pathophysiology of pneumonia involves the following steps:
Respiratory Syncytial Virus Disease01:29

Respiratory Syncytial Virus Disease

Human respiratory syncytial virus (RSV) is a widespread pathogen that primarily targets infants and young children but also poses a serious health risk to elderly and immunocompromised individuals. Belonging to the Pneumoviridae family, RSV is a negative-sense, single-stranded RNA virus within the Pneumovirus genus. Its global health burden is significant, with millions of cases annually resulting in hospitalizations and mortality, particularly in resource-limited settings. Although most...
Pneumonia V: Nursing management and Prevention01:30

Pneumonia V: Nursing management and Prevention

Nursing management of pneumonia involves promoting airway patency, facilitating rest and conserving energy, encouraging fluid intake, maintaining nutrition, and educating patients.
The nurse must practice strict medical asepsis and adhere to infection control guidelines to minimize healthcare-associated infections.
Enhance airway patency
Position the patient correctly to facilitate drainage of the affected lung segments. Manual or mechanical percussion and vibration can also be employed.

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Related Experiment Video

Updated: Jun 25, 2026

A Mouse Model for the Transition of Streptococcus pneumoniae from Colonizer to Pathogen upon Viral Co-Infection Recapitulates Age-Exacerbated Illness
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A Mouse Model for the Transition of Streptococcus pneumoniae from Colonizer to Pathogen upon Viral Co-Infection Recapitulates Age-Exacerbated Illness

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Viral pneumonia.

Maria Angeles Marcos1, Mariano Esperatti, Antoni Torres

  • 1Department of Microbiology, Hospital Clínic i Provincial de Barcelona, Spain.

Current Opinion in Infectious Diseases
|March 12, 2009
PubMed
Summary
This summary is machine-generated.

Viral infections are a common cause of community-acquired pneumonia (CAP), often linked to worse outcomes in mixed infections. Extensive viral testing is recommended for better patient management.

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Area of Science:

  • Infectious Diseases
  • Pulmonology
  • Virology

Background:

  • Community-acquired pneumonia (CAP) research has historically underemphasized viral etiologies.
  • Limited studies have performed comprehensive evaluations for viral causes of CAP.

Purpose of the Study:

  • To review current understanding of viral infections in CAP.
  • To highlight findings from recent studies employing exhaustive viral detection methods.

Main Methods:

  • Review of recent studies utilizing advanced diagnostic tests, such as nucleic acid amplification techniques (NAATs).
  • Analysis of data on viral pathogen identification and clinical associations in CAP patients.

Main Results:

  • NAATs significantly improve the detection of multiple viral pathogens, identifying a viral cause in over 50% of CAP cases.
  • Influenza A and respiratory syncytial virus are the most prevalent viral culprits, followed by adenovirus and parainfluenza viruses.
  • Mixed viral-bacterial infections are associated with increased disease severity; no specific clinical signs predict viral etiology.

Conclusions:

  • The high prevalence of viral CAP and its association with poorer prognosis in mixed infections warrant extensive viral evaluation in select populations.
  • Findings support improved diagnostic strategies for accurate estimation of viral infection burden in epidemiological studies.
  • Enhanced viral diagnostics can inform more appropriate clinical management of CAP patients.