Related Experiment Video

Updated: Jun 13, 2026

A Mouse Model for the Transition of Streptococcus pneumoniae from Colonizer to Pathogen upon Viral Co-Infection Recapitulates Age-Exacerbated Illness
12:21

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

Published on: September 28, 2022

Bench-to-bedside review: bacterial pneumonia with influenza - pathogenesis and clinical implications

Koenraad F van der Sluijs1, Tom van der Poll, René Lutter

  • 1Departments of Pulmonology and Experimental Immunology, Academic Medical Center, Amsterdam, The Netherlands. kvandersluijs@amc.uva.nl

Critical Care (London, England)
|May 13, 2010
PubMed

Insights

Influenza often leads to secondary bacterial pneumonia, with distinct mechanisms for combined viral/bacterial and post-influenza types. Understanding these pathways is crucial for effective bacterial pneumonia treatment during and after flu seasons.

Area of Science:

  • Infectious Diseases
  • Microbiology
  • Immunology

Background:

  • Seasonal and pandemic influenza frequently lead to secondary bacterial infections, increasing hospitalization and mortality.
  • Secondary bacterial respiratory infections include combined viral/bacterial pneumonia and post-influenza pneumonia, differing in their pathogenesis.
  • These infections involve complex interactions between viruses, bacteria, and host responses, impacting tissue homeostasis and immune defense.

Purpose of the Study:

  • To review the underlying mechanisms of combined viral/bacterial infection and post-influenza pneumonia.
  • To highlight key considerations for treating bacterial pneumonia during and shortly after influenza infections.

Main Methods:

  • Literature review summarizing current research on influenza-associated bacterial pneumonia.
  • Analysis of pathogenic mechanisms differentiating combined and post-influenza pneumonia.
  • Synthesis of treatment strategies based on identified mechanisms.

Main Results:

  • Combined viral/bacterial pneumonia involves direct interaction between virus, bacterium, and host.
  • Post-influenza pneumonia may result from the resolution of inflammation from the primary viral infection, impairing subsequent bacterial defense.
  • Distinct pathogenic pathways necessitate tailored treatment approaches.

Conclusions:

  • Understanding the specific mechanisms of secondary bacterial pneumonia post-influenza is critical for clinical management.
  • Effective treatment requires consideration of the timing and type of bacterial pneumonia following influenza.
  • Further research into host-pathogen interactions can optimize therapeutic strategies.

More Related Videos

Using Bioluminescent Imaging to Investigate Synergism Between Streptococcus pneumoniae and Influenza A Virus in Infant Mice10:47

Using Bioluminescent Imaging to Investigate Synergism Between Streptococcus pneumoniae and Influenza A Virus in Infant Mice

Published on: April 14, 2011

A Precise Pathogen Delivery and Recovery System for Murine Models of Secondary Bacterial Pneumonia13:45

A Precise Pathogen Delivery and Recovery System for Murine Models of Secondary Bacterial Pneumonia

Published on: September 21, 2019

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...
Influenza01:27

Influenza

Influenza is an acute, highly communicable viral disease that affects the respiratory tract and is responsible for seasonal epidemics worldwide. Influenza A is the most prevalent type associated with widespread outbreaks and is subtyped based on two surface glycoproteins: hemagglutinin (H) and neuraminidase (N), as in H1N1. These glycoproteins are essential for viral infectivity, transmission, and immune recognition. Transmission occurs primarily through respiratory droplets and contaminated...
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: