Related Experiment Video

Updated: Aug 8, 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

Treatment of pneumococcal pneumonia: the case for penicillin G

C S Bryan1

  • 1Department of Medicine, University of South Carolina School of Medicine, Columbia, USA.

The American Journal of Medicine
|August 18, 1999
PubMed

Insights

Penicillin G can effectively treat pneumococcal pneumonia, even with resistant strains. Early diagnosis and optimized dosing are key to its successful clinical use.

Area of Science:

  • Infectious Diseases
  • Pharmacology
  • Microbiology

Background:

  • Penicillin G is recommended for pneumococcal pneumonia but rarely used clinically.
  • Clinical underutilization stems from concerns about penicillin-resistant Streptococcus pneumoniae (PRSP), diagnostic challenges, and dosing uncertainty.

Purpose of the Study:

  • To evaluate the clinical utility of high-dose penicillin G for pneumococcal pneumonia.
  • To address concerns regarding penicillin resistance and optimize treatment strategies.

Main Methods:

  • Continuous infusion of high-dose penicillin G (20-24 million units/day) was analyzed.
  • Serum penicillin levels were assessed in individuals with normal renal function.
  • Minimum inhibitory concentrations (MICs) of penicillin G against PRSP strains were compared to achieved serum levels.

Main Results:

  • Achieved serum penicillin levels (16-20 microg/mL) exceed MICs for most PRSP strains (4 microg/mL).
  • High-dose penicillin G therapy has demonstrated therapeutic effectiveness against PRSP pneumonia.
  • Monitoring is crucial as extremely resistant strains (MIC ≥ 8 microg/mL) may not respond.

Conclusions:

  • High-dose penicillin G remains a viable treatment for pneumococcal pneumonia.
  • Improved diagnostic methods for pneumococcal pneumonia could enhance penicillin G's utility.
  • Effective penicillin G use may delay the emergence of resistance to other antibiotics.

More Related Videos

Visualization of Streptococcus pneumoniae within Cardiac Microlesions and Subsequent Cardiac Remodeling08:25

Visualization of Streptococcus pneumoniae within Cardiac Microlesions and Subsequent Cardiac Remodeling

Published on: April 7, 2015

A Robust Pneumonia Model in Immunocompetent Rodents to Evaluate Antibacterial Efficacy against S. pneumoniae, H. influenzae, K. pneumoniae, P. aeruginosa or A. baumannii09:17

A Robust Pneumonia Model in Immunocompetent Rodents to Evaluate Antibacterial Efficacy against S. pneumoniae, H. influenzae, K. pneumoniae, P. aeruginosa or A. baumannii

Published on: January 2, 2017

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 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:
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.
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...