Related Experiment Video
Updated: Aug 23, 2026

Following in Real Time the Impact of Pneumococcal Virulence Factors in an Acute Mouse Pneumonia Model Using Bioluminescent Bacteria
Published on: February 23, 2014
[Various new pathogens in pneumonia]
1Clinique de médecine, Hôpital Cantonal, Fribourg.
Abstract:
The table summarizes the many newly recognized agents causing lower respiratory tract infections: gram + cocci, Streptococcus agalactiae, enterococci; gram-rods, acinetobacter, Aeromonas hydrophila, Eikenella corrodens; Mycobacterium tuberculosis resistant to multiple drugs, intracellular organisms and viruses. Some details are given in four chapters: Pneumococci resistant to penicillin G which must be detected and impose new therapeutic strategies; Chlamydia pneumoniae with its difficulties for the diagnosis and the absence of standardized therapeutic trials; Streptococcus pyogenes with a recrudescence of severe and invasive infections, TSS and virulence factors; the pulmonary Hantavirus syndrome with 105 patients recognized (mortality 52%) in the USA and Canada, the homeland of the deermouse (Peromiscus maniculatus).
Insights
Newly identified pathogens like drug-resistant Mycobacterium tuberculosis and Hantavirus cause severe respiratory infections. Early detection and new treatment strategies are crucial for managing these emerging infectious agents.
Area of Science:
- Microbiology
- Infectious Diseases
- Pulmonology
Context:
- Emerging infectious agents are increasingly implicated in lower respiratory tract infections.
- Traditional pathogens are evolving resistance, necessitating updated diagnostic and therapeutic approaches.
- Novel viruses and bacteria pose significant public health challenges globally.
Purpose:
- To review and highlight newly recognized microbial agents responsible for lower respiratory tract infections.
- To discuss the diagnostic challenges and therapeutic implications associated with these emerging pathogens.
- To underscore the importance of surveillance and strategic management of respiratory infections.
Summary:
- Newly identified agents include drug-resistant Mycobacterium tuberculosis, Gram-positive cocci (Streptococcus agalactiae, Enterococci), Gram-negative rods (Acinetobacter, Aeromonas hydrophila, Eikenella corrodens), intracellular organisms, and viruses.
- Specific focus is given to penicillin G-resistant Pneumococci, Chlamydia pneumoniae, Streptococcus pyogenes (associated with severe invasive infections), and pulmonary Hantavirus syndrome.
- The pulmonary Hantavirus syndrome, particularly in North America, presents a high mortality rate, emphasizing the need for awareness and rapid diagnosis.
Impact:
- Highlights the evolving landscape of respiratory pathogens, including antibiotic-resistant strains and novel viruses.
- Stresses the need for enhanced diagnostic capabilities and the development of new therapeutic strategies.
- Informs public health initiatives and clinical practice regarding the management of severe and invasive respiratory infections.
More Related Videos
07:43A Non-invasive and Technically Non-intensive Method for Induction and Phenotyping of Experimental Bacterial Pneumonia in Mice
Published on: September 28, 2016
12:21A 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
Related Concept Videos
Pneumonia I: Introduction
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: Pathophysiology
Pneumonia III: Complications and Assessment
Pneumonia IV: Management
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 Pneumonia
Pneumonia I: Introduction