What is Streptococcus pneumoniae?

Streptococcus pneumoniae is a Gram-positive diplococcus with a well-formed capsule. This organism is one of the commonest seen in community-acquired pneumonias, accounting for up to 25% of these infections. In the preantibiotic era streptococcal pneumonia or pneumococcal pneumonia had a high fatality rate, being a frequent cause of death in the elderly.

Today certain serotypes of S. pneumoniae will rarely produce necrotizing abscesses in the lung. Usually, however, pneumococcal pneumonia presents as homogeneous air space consolidation occupying a portion of a segment or lobe of lung particularly in the periphery. Air bronchograms are frequently identified as evidence of parapneumonic effusion (Fig.1). Both single and multiple lobes may be involved. Radiographic evidence of resolution is generally identified within a few days of appropriate antibiotic therapy.

Complete resolution of the pneumonia, however, may be delayed for several weeks. Clinically patients present with high fever, chills, productive cough, and occasionally pleuritic pain. In patients with a healthy immune system the prognosis with appropriate antibiotic therapy is very good. However, in patients with a failure to develop leukocytosis the mortality rate is very high.

Imaging Examples

Streptococcus pneumonia, Fig.1

The above article is republished with permission from Medcyclopaedia™, a unique service of GE Healthcare. Medcyclopaedia provides comprehensive coverage of more than 18,000 medical topics - interactive e-learning solutions as well as the rich database of medical images and media clips. Medcyclopaedia gives you instant access to solutions & resources that few other websites can match. Copyright 2010 Medcyclopaedia Text and Images. All rights reserved.

Other web services from GE Healthcare:

Controversies and Consensus in Imaging and Intervention

Last Updated: Oct 28, 2013

Read in | English | Español | Français | Deutsch | Português | Italiano | 日本語 | 한국어 | 简体中文 | 繁體中文 | Nederlands | Русский | Svenska | Polski
  1. Clara Vera Clara Vera United Kingdom says:

    Hi, i don't know if i'm even writing in on an appropriate site..but nothing ventured nowt gained and to be honest i am pretty much at the end of my tether with this crazy affliction that i have had..FOR OVER A YEAR. So for any assistance, info, etc i  would be sincerely grateful. I have had this sore, red bit under my nose, (what i have been refering to as my shush!) and after copious amounts of different creams, (mostly of a steriod base) nothing has shifted if and it has moved up into my nose where it peels and reddens. Right, to cut a long story short, finally my GP sent me to a dermatologist who has discovered this Streptococcus pneumonia has taken residence in my left today AFTER ONE YEAR i have finally been given amoxicillin 500g to be taken two twice daily. Okay, sound i really hope they work..but what is concerning me is the fact that i also have Very bad lungs for a woman of my age, (36) C.O.P.D and am wondering if the two are in fact connected? Like i say, any info/help at this stage would really be great,  many thanks- don't hesitate to contact me, Clare.

  2. Clara Vera Clara Vera United Kingdom says:

    I'm not actually giving feedback.....sorry.

  3. Janet Campbell Janet Campbell United States says:

    I'm writing this on behalf of my cousin.. To make a long story short.  She had gotten sepsis from a kidney stone, ended up in hospital for almost a month nearly lost her life.  So she returns home and had been home for about 2 and a half months goes to bed one night and passes away in her sleep. Her autopsy results said she died from pneumonia I never heard her complain of anything to due with pneumonia.  She had complained of pain in hip area and found out the sepsis had eaten half of her hip up and doctors were going to replace her hip.  Has anyone ever heard of anything like this before just looking to try to understand what happened to her she was only 43. It's just so confusing.

The opinions expressed here are the views of the writer and do not necessarily reflect the views and opinions of News-Medical.Net.
Post a new comment
You might also like... ×
New immunization approach may one day wipe out pneumonia, meningitis