Related Experiment Video

Updated: Aug 14, 2026

Following in Real Time the Impact of Pneumococcal Virulence Factors in an Acute Mouse Pneumonia Model Using Bioluminescent Bacteria
11:32

Following in Real Time the Impact of Pneumococcal Virulence Factors in an Acute Mouse Pneumonia Model Using Bioluminescent Bacteria

Published on: February 23, 2014

The pathology of community-acquired pneumonia

P Barnes1

  • 1Department of Pathology, Faculty of Medicine, Dalhousie University, Halifax, Canada.

Seminars in Respiratory Infections
|September 1, 1994
PubMed

Insights

This review details the pathology of community-acquired pneumonia, comparing different patterns and highlighting diagnostic clues for microbial agents. It also discusses advanced techniques and biopsy methods for accurate diagnosis.

Area of Science:

  • Pathology
  • Pulmonology
  • Microbiology

Background:

  • Understanding pathologic processes is crucial for diagnosing respiratory disorders.
  • Community-acquired pneumonia (CAP) presents diverse gross and microscopic features.
  • Identifying causative microbial agents is key to effective treatment.

Purpose of the Study:

  • To review the pathology of community-acquired pneumonia.
  • To compare different pneumonia patterns and their histological features.
  • To discuss diagnostic aids for identifying microbial causes of lung injury.

Main Methods:

  • Comparative analysis of gross and microscopic features of pneumonia types (bronchopneumonia, lobar, interstitial, mixed).
  • Discussion of histological clues for specific microbial agents.
  • Overview of special diagnostic techniques: immunohistochemistry, in situ hybridization, polymerase chain reaction (PCR).
  • Evaluation of biopsy methods: open lung biopsy, fine needle aspiration (FNA), bronchoalveolar lavage (BAL).

Main Results:

  • Distinct gross and microscopic features differentiate pneumonia patterns.
  • Specific histological findings can suggest particular causative microbes.
  • Advanced techniques offer improved sensitivity and specificity in microbial diagnosis.
  • Biopsy methods vary in their advantages and limitations for obtaining diagnostic material.

Conclusions:

  • Pathologic examination is fundamental for diagnosing respiratory disorders like pneumonia.
  • Histological analysis combined with special techniques aids in identifying causative agents.
  • Appropriate selection of biopsy methods is essential for successful diagnosis.

More Related Videos

Visualization of Streptococcus pneumoniae within Cardiac Microlesions and Subsequent Cardiac Remodeling08:25

Visualization of Streptococcus pneumoniae within Cardiac Microlesions and Subsequent Cardiac Remodeling

Published on: April 7, 2015

Methods for Detecting Cytotoxic Amyloids Following Infection of Pulmonary Endothelial Cells by Pseudomonas aeruginosa07:27

Methods for Detecting Cytotoxic Amyloids Following Infection of Pulmonary Endothelial Cells by Pseudomonas aeruginosa

Published on: July 12, 2018

Related Concept Videos

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:
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 IV: Management01:28

Pneumonia IV: Management

The treatment of pneumonia varies based on its severity and the causative pathogen. Here is a structured approach to managing pneumonia, integrating pharmaceutical and supportive care strategies.
Bacterial Pneumonia Treatment
For bacterial pneumonia, antibiotics serve as the cornerstone of therapy. Initial treatment often begins with empirical antibiotics, tailored to the anticipated causative organism and adjusted based on culture results. Key antibiotic choices include:
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 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...