Comparison of mortality between nosocomial and community-acquired febrile neutropenia patients treated initially with cefazolin plus tobramycin: retrospective chart review.

Cefazolin plus tobramycin have been determined to be effective for community-acquired FN, but have not been evaluated in the treatment of nosocomial FN. This study compared the incidence of mortality from 2002 to 2004 with 2008 to 2009 in patients with nosocomial FN treated with cefazolin plus tobramycin and compared characteristics of patients with nosocomially acquired FN to community acquired FN. A retrospective chart review of 45 nosocomial FN episodes from 2008 to 2009, and 54 episodes from 2002 to 2004 treated with cefazolin plus tobramycin was conducted. Data on the community acquired FN episodes was obtained from our previous research. Nosocomial FN mortality increased from 4% in 2002-2004 to 13% in 2008-2009 (p = 0.08). The nosocomial cohort was at higher risk of medical complications and mortality than the community-acquired cohort based on several variables (neutrophil nadir, duration of neutropenia and fever, hematological malignancy, MASCC and Talcott score; p < 0.05). As a result, the nosocomial cohort was treated with longer courses of antibiotic therapy (14 days vs 7 days; p < 0.0001) and were more likely to require broader spectrum antibiotics (64 out of 99 vs 34 out of 96; p < 0.0001). There was an observed increased risk of mortality from 2002 to 2004 compared with 2008 to 2009 in patients treated with cefazolin plus tobramycin for nosocomial FN, this was notable despite not attaining statistical significance. Therefore, this regimen is not appropriate for nosocomial FN.