Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

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 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.
Streptococcal Pharyngitis01:27

Streptococcal Pharyngitis

Streptococcal pharyngitis, commonly known as “strep throat,” is an acute infection of the oropharyngeal tissues caused by the Gram‑positive Group A Streptococcus (Streptococcus pyogenes). Transmission occurs primarily through respiratory droplets expelled during coughing, sneezing, or talking.Mechanisms of Host Entry and Immune EvasionUpon entering the host, S. pyogenes adheres to the mucosal epithelial cells of the pharynx via surface proteins, notably lipoteichoic acid and the antiphagocytic...
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...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Association between D-dimers and in-hospital all-cause mortality in COVID-19 patients at a tertiary hospital in South Africa: A retrospective study.

African journal of thoracic and critical care medicine·2026
Same author

Comprehensive Observations of Magnetospheric Particle Acceleration, Sources, and Sinks (COMPASS): A Mission Concept to Explore the Extremes of Jupiter's Magnetosphere.

Space science reviews·2026
Same author

Severe Community-Acquired Pneumonia: Impact of HIV on Clinical Presentation, Microbiological and Laboratory Findings, and Outcome.

Journal of intensive care medicine·2025
Same author

Serum chitotriosidase activity in South African patients with sarcoidosis and tuberculosis.

African journal of thoracic and critical care medicine·2025
Same author

Vaccines in the fight against antimicrobial resistance - perspectives from South Africa.

South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde·2024
Same author

Pro-inflammatory interactions of streptolysin O toxin with human neutrophils <i>in vitro</i>.

Journal of immunotoxicology·2024
Same journal

SAMA Health Summit Abstracts.

South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde·2026
Same journal

On behalf of the South African Medical Association (SAMA), The Scientific Committee of the SAMA Health Summit, is pleased to pesent this abstract issue, showcasing the posters and oral presentations delivered at the Summit, which was held from 22-24 May 2026.

South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde·2026
Same journal

Proceedings of the 2<sup>nd</sup> Data Driven Surgery Conference (DDSC 2025).

South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde·2026
Same journal

Clinical practice guidelines for the management of fever and neutropenia in South African children and adolescents with cancer.

South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde·2026
Same journal

The changing fortunes of the District Health System in SA (1994 - 2020): A retrospective review.

South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde·2026
Same journal

Thomas Micheal Guntram Ignaz Rehle (1951 - 2025).

South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde·2026
See all related articles

Related Experiment Video

Updated: Jun 28, 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

Does primary Streptococcus viridans pneumonia exist?

A Goolam Mahomed1, C Feldman, C Smith

  • 1Department of Medicine, Hillbrow Hospital, Johannesburg.

South African Medical Journal = Suid-Afrikaanse Tydskrif Vir Geneeskunde
|December 1, 1992
PubMed
Summary
This summary is machine-generated.

Streptococcus viridans can cause community-acquired pneumonia (CAP) in adults. This bacterium should be considered in chest infections, especially with positive blood cultures and no other identified pathogen.

More Related Videos

Visualization of Streptococcus pneumoniae within Cardiac Microlesions and Subsequent Cardiac Remodeling
08:25

Visualization of Streptococcus pneumoniae within Cardiac Microlesions and Subsequent Cardiac Remodeling

Published on: April 7, 2015

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

Related Experiment Videos

Last Updated: Jun 28, 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

Visualization of Streptococcus pneumoniae within Cardiac Microlesions and Subsequent Cardiac Remodeling
08:25

Visualization of Streptococcus pneumoniae within Cardiac Microlesions and Subsequent Cardiac Remodeling

Published on: April 7, 2015

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

Area of Science:

  • Microbiology
  • Infectious Diseases
  • Pulmonology

Background:

  • Community-acquired pneumonia (CAP) is a significant global health concern.
  • Etiological diagnosis of CAP can be challenging, with a substantial proportion of cases remaining undiagnosed.
  • The role of specific bacterial species, like viridans streptococci, in CAP is not fully elucidated.

Observation:

  • Four adult patients presented with community-acquired pneumonia (CAP).
  • Blood cultures consistently isolated Streptococcus viridans as the sole pathogen.
  • Sputum cultures and Gram stains were negative in most cases; echocardiography ruled out endocarditis.

Findings:

  • Streptococcus viridans was identified as the causative agent in these CAP cases.
  • Radiographic findings included segmental or subsegmental consolidations, sometimes appearing mass-like.
  • The absence of other microbiological findings highlights the significance of blood culture results.

Implications:

  • Viridans streptococci may be an underrecognized cause of CAP.
  • Clinicians should consider Streptococcus viridans in the differential diagnosis of CAP.
  • Further research is warranted to understand the prevalence and clinical significance of viridans streptococci-associated pneumonia.