Related Experiment Video
Updated: Jun 19, 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
COMMON COLDS AS A POSSIBLE SOURCE OF CONTAGION FOR LOBAR PNEUMONIA
1Bureau of Laboratories of the Department of Health of the City of New York, New York.
Abstract:
In two instances of common colds, with no known contact with cases of pneumonia, Pneumococcus Type I was found to be the predominating organism, which strongly suggests that it was the etiological agent in these colds. If this is so, common colds of this type must be looked upon as a possible source of contagion in the development of lobar pneumonia due to the Type I pneumococcus.
Insights
Pneumococcus Type I may cause common colds, suggesting colds could spread lobar pneumonia. This research identifies a potential link between respiratory infections and bacterial transmission.
Area of Science:
- Microbiology
- Infectious Diseases
- Public Health
Background:
- Common colds are frequent respiratory illnesses with varied causes.
- Bacterial pathogens, including Streptococcus pneumoniae, are implicated in respiratory infections.
- The specific role of Pneumococcus Type I in common colds and its link to pneumonia requires further investigation.
Purpose of the Study:
- To investigate the etiological role of Pneumococcus Type I in common cold cases.
- To determine if common colds caused by Pneumococcus Type I can serve as a source for lobar pneumonia.
Main Methods:
- Case study analysis of two common cold instances.
- Identification of predominant microorganisms in respiratory secretions.
Main Results:
- Pneumococcus Type I was the predominant organism in two common cold cases.
- No known contact with pneumonia cases was reported in these instances.
Conclusions:
- Pneumococcus Type I is a likely etiological agent for these common colds.
- Common colds caused by Pneumococcus Type I may be a potential source of contagion for Type I pneumococcus-related lobar pneumonia.
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 I: Introduction
Pneumonia II: Pathophysiology
Atypical Pneumonia
Pneumonia III: Complications and Assessment
Pulmonary Tuberculosis I
Causative Organism
The primary infectious agent causing tuberculosis is Mycobacterium tuberculosis, a slow-growing, acid-fast, aerobic rod that exhibits sensitivity to heat and ultraviolet light. Instances of Mycobacterium bovis and Mycobacterium avium contributing to the development of TB infection are rare.
Mode of...
