Table 2

Organisms recovered from blood cultures performed during emergency department visits

OrganismNo. of organisms recovered
Likely pathogens
    Staphylococcus aureus161
    Escherichia coli152
    Coagulase-negative staphylococcia124
    Klebsiella pneumoniae96
    Pseudomonas aeruginosa33
    Streptococcus pneumoniae33
    Alpha-hemolytic Streptococcus32
    Enterobacter cloacae29
    Streptococcus mitis18
    Klebsiella oxytoca16
    Other species (89 distinct species)232
Likely contaminants
    Coagulase-negative staphylococcia254
    Isolates not undergoing full identificationb79
    Enterococcus faecalis47
    Micrococcus species31
    Bacillus cereus12
    Vancomycin-resistant E. faecium12
    Abiotrophia/Granulicatella5
    Nutritionally variant Gram-positive coccus5
    Ochrobactrum anthropi4
    Vancomycin-resistant E. faecalis4
    Enterococcus durans2
    Lactobacillus species1
    Lactococcus species1
    Microbacterium species1
  • a Designated as a likely contaminant or a likely pathogen based on chart review.

  • b Includes all results that were not investigated following laboratory designation of contaminant.