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Polymicrobial bacteremic pneumonia: report of three cases caused by Staphylococcus aureus and Streptococcus
1Infectious Disease Division, Brown University Program in Medicine, Providence, Rhode Island.
Abstract:
Three patients are reported with simultaneous bacteremia caused by Staphylococcus aureus and Streptococcus pneumoniae complicating community-acquired pneumonia. Polymicrobial bacteremia caused by pyogenic organisms has rarely been reported. Two of the patients had severe underlying hepatic disease, and the third had suffered a recent myocardial infarction. The infection ultimately proved fatal in each patient. The pathophysiologic aspects and clinical consequences of polymicrobial bacteremia arising from respiratory as well as from other sources is briefly reviewed.
Insights
Simultaneous bacteremia from Staphylococcus aureus and Streptococcus pneumoniae is a rare complication of community-acquired pneumonia. This severe polymicrobial infection proved fatal in all three reported patients, highlighting the critical nature of such cases.
Area of Science:
- Infectious Diseases
- Internal Medicine
- Critical Care Medicine
Background:
- Community-acquired pneumonia (CAP) can lead to serious complications.
- Bacteremia, the presence of bacteria in the bloodstream, is a significant concern in CAP.
- Polymicrobial bacteremia, involving multiple types of bacteria, is infrequently reported.
Observation:
- Three patients presented with simultaneous bacteremia.
- The causative pathogens were identified as Staphylococcus aureus and Streptococcus pneumoniae.
- All three patients had CAP as the underlying condition.
Findings:
- Two patients had severe hepatic disease, and one had a recent myocardial infarction.
- The polymicrobial bacteremia was associated with a fatal outcome in all cases.
- This highlights the severe prognosis of simultaneous Staphylococcus aureus and Streptococcus pneumoniae bacteremia.
Implications:
- Simultaneous bacteremia with Staphylococcus aureus and Streptococcus pneumoniae is a rare but highly lethal complication of CAP.
- Patients with severe underlying conditions like hepatic disease or myocardial infarction are at increased risk.
- Understanding the pathophysiology and clinical consequences of polymicrobial bacteremia is crucial for patient management.