Blood culture contamination

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Blood culture contaminants

  • Never bacteremia
    • Corynebacterium
    • Bacillus, except B. anthracis
    • Propionobacterium acnes
  • Almost never bacteremia
    • Micrococcus
    • Enterococcus
    • Clostridium perfringens
    • Coagulase-negative staphylococci
  • Always true bacteremia
    • Saphylococcus aureus
    • Streptococcus pneumoniae
    • Escherichia coli
    • Enterobacteraciae
    • Pseudomonas aeruginosa
    • Candida albicans
  • Coagulase negative staphylococci are rarely significant (12%), but because they are so common (70-80% of all positive cultures), they are the most common cause of bacteremia.