1. Ascertain details on blood cultures
How man bottles/sets were positive? Site of stick? Aerobic/anaerobic bottle? Gram Stain?
Multiple positive sets is concerning
Longer time to positivity is ofter suggestive of contaminant, although tough to utilize unless extreme
2. Patient and clinical status
Why were cultures obtained? Do they have signs or symptoms that correlate with infection?
Risk factors, such as hardware or prosthetic material? Immunocompromised host?
Anaerobes (eg. Bacteroides)
Streptococcus gallolyticus (Strep bovis, Group B)
Streptococcus pyogenes (Group A )
Yeast (eg. Candida)
Streptococcus viridans group
Coagulase negative staphylococci
Lactobacillus (Other Bacillus spp)