Adult

Positive blood cultures: actions to take

Warning
Call from Microbiology Lab with Positive Blood Culture result or results seen on EPR
  • Think Sepsis - prompt treatment could save this patient's life: Sepsis Identification and Management
  • Check observations, renal function, drug chart, allergies
  • Ensure handover to next team 
  • Consider discussion with on-call Micro SpR (and ITU) if clinical situation not straightforward
  • If patient not reviewed in person, please ensure a clinical note is written in EPR

All patients will be automatically flagged to Micro/ID team via lab for next day urgent review

Review empirical treatment within 48-72 hours

Blood culture result is "presumptive Staphylococcus aureus"

  • Ensure blood cultures are repeated within 72 hours since last positive blood culture

Preferred: flucloxacillin 2g iv qds

For penicillin allergy (non-severe)cefazolin 2g iv tds

For penicillin allergy (severe) or MRSA positive: teicoplanin iv 

Blood culture result is "Gram-negative rods seen"

  • If on amoxicillin or co-amoxiclav and observations stable, no action required
  • If observations unstable and already on antibiotics, discuss with on-call Micro SpR

If NOT on antibiotics:

Preferred: amoxicillin 1g iv tds AND gentamicin 5mg/kg iv.  

Gentamicin is for maximum of 3 days. Take a gentamicin level at 6-14 hours after first dose to calculate dosing interval, usually 24 hourly, 36 hourly or 48 hourly. See gentamicin monograph for dosing (including renal dosing) and monitoring.

 

For penicillin allergy (non-severe and severe):

co-trimoxazole 960mg po bd (or iv if NBM)

OR

gentamicin 5mg/kg iv. Gentamicin is for maximum of 3 days. Take a gentamicin level at 6-14 hours after first dose to calculate dosing interval, usually 24 hourly, 36 hourly or 48 hourly. See gentamicin monograph for dosing (including renal dosing) and monitoring.

Editorial Information

Next review date: 01 Jul 2027