Puneet Varma (Editor)

Streptococcus pseudopneumoniae

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Domain
  
Bacteria

Order
  
Lactobacillales

Genus
  
Streptococcus

Rank
  
Species

Phylum
  
Firmicutes

Family
  
Streptococcaceae

Higher classification
  
Streptococcus

Streptococcus pseudopneumoniae jcmasmorgcontent443923F1smallgif

Scientific name
  
Streptococcus pseudopneumoniae

Similar
  
Bacteria, Streptococcus oralis, Streptococcus mitis, Streptococcus vestibularis, Streptococcus anginosus

Streptococcus pseudopneumoniae is a gram-positive coccus that may cause pneumonia in humans. It was first described in 2004. The organism is often mistaken for S. pneumoniae and its clinical importance is as yet uncertain. It seems likely that most cases of S. pseudopneumoniae pneumonia are misdiagnosed as S. pneumoniae.

The bacterium has a number of features that allows it to be distinguished from S. pneumoniae:

  • There is no pneumococcal capsule (and is therefore not typable).
  • It is not soluble in bile.
  • It is sensitive to optochin when incubated in ambient air, but appears resistant or to have indeterminate susceptibility when incubated in 5% carbon dioxide.
  • Commercial DNA probe hybridization tests (e.g., AccuProbe Streptococcus pneumoniae culture identification test; Gen-Probe, San Diego, CA) are falsely positive.

    • Penicillin is the treatment of choice. Most reported isolates are resistant to erythromycin and to tetracycline.

    References

    Streptococcus pseudopneumoniae Wikipedia
    (Text) CC BY-SA