Bacteroides bacteremia

Some key learning points from our M&M case discussion today:

  • Ertapenem is a slow acting antibiotic and not an ideal empiric treatment in a patient who presents with sepsis or is acutely ill.  So if you want to use a carbapenem for empiric coverage, pick meropenem or imipenem instead.
    • Fun fact: ertapenem is actually more expensive than mero/imi.  The only use for ertapenem is in transitioning patients from hospitalization to home where its daily dosing is more favorable than the TID dosing of meropenem.
  • For diabetic foot ulcers, please refer to our SCVMC algorithm to help you figure out empiric antibiotics.  Simply open the HHSConnect browser and type in diabetic foot in the search bar to pull up the algorithm.
  • If blood cultures take a longer time to speciate (in our patient, over 5 days), expect anaerobes because anaerobes are difficult to culture and are sent out for speciation.  E coli is an organism that should speciate quickly and would grow in aerobic and anaerobic bottles.  If a species is only growing in anaerobic bottles, then it’s probably not E coli.
  • Levofloxacin is the only fluoroquinolone that has a role in outpatient treatment of GNR bacteremia, other fluoroquinolones (like cipro) are less effective.
  • Avoid using fluoroquinolones for empiric treatment of E coli bacteremia or pyelonephritis because our VMC antibiogram shows ~25% resistance with fluoroquinolones.

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