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Related Concept Videos

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...
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...
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...
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 II: Pathophysiology01:29

Pneumonia II: Pathophysiology

The pathophysiology of pneumonia involves the following steps:

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Related Experiment Video

Updated: Jun 22, 2026

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

Pyomyositis due to Streptococcus pneumoniae.

S Lindsey Wong1, Evelyn Y Anthony, Avinash K Shetty

  • 1Department of Pediatrics, Wake Forest University Health Sciences and Brenner Children's Hospital, Winston-Salem, NC 27157, USA.

The American Journal of Emergency Medicine
|June 6, 2009
PubMed
Summary

Pneumococcal pyomyositis, a rare childhood infection, can mimic other conditions. This case highlights successful treatment of Streptococcus pneumoniae-induced pyomyositis with clindamycin.

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Constructing Mutants in Serotype 1 Streptococcus pneumoniae strain 519/43
06:06

Constructing Mutants in Serotype 1 Streptococcus pneumoniae strain 519/43

Published on: September 11, 2020

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Last Updated: Jun 22, 2026

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

Constructing Mutants in Serotype 1 Streptococcus pneumoniae strain 519/43
06:06

Constructing Mutants in Serotype 1 Streptococcus pneumoniae strain 519/43

Published on: September 11, 2020

Area of Science:

  • Pediatric infectious diseases
  • Musculoskeletal infections

Background:

  • Pyomyositis is a bacterial muscle infection, typically caused by Staphylococcus aureus.
  • Pneumococcal pyomyositis, caused by Streptococcus pneumoniae, is exceptionally rare in children.
  • Clinical presentation can be challenging, often mimicking hip septic arthritis or appendicitis.

Observation:

  • A 12-year-old male presented with fever and severe right hip and abdominal pain.
  • Magnetic resonance imaging (MRI) confirmed pyomyositis of the right hip.
  • Blood cultures identified Streptococcus pneumoniae, susceptible to penicillin, ceftriaxone, and clindamycin.

Findings:

  • The patient received a 3-week course of clindamycin.
  • Successful treatment of pneumococcal pyomyositis was achieved.
  • Early diagnosis and targeted antibiotic therapy are crucial.

Implications:

  • This case underscores the importance of considering rare pathogens in pediatric pyomyositis.
  • Prompt recognition and appropriate management, including potential surgical drainage, are vital for favorable outcomes.
  • Highlights effective antibiotic choices for Streptococcus pneumoniae-induced pyomyositis.