Bacteremia in febrile nonneutropenic pediatric oncology patients

Abstract

Background: We sought to determine the risk of bacteremia in a cohort of outpatient febrile nonneutropenic pediatric oncology patients and to assess clinical characteristics that may influence decisions regarding empiric antibiotic therapy.

Procedure: A single institution retrospective cohort study was performed of outpatient pediatric oncology patients presenting with fever, a central venous catheter, and an absolute neutrophil count (ANC) of >/=500/microl over a 6-year period. We also collected data regarding the presence of clinically evident infections, antibiotics prescribed, and the sensitivity of bacteria to specific antibiotics.

Results: There were 29 cases of bacteremia in 459 (6.3%) febrile outpatient visits by 167 patients. Bacteremia was documented in 4.4% of patients with ports and in 16.2% of patients with external catheters. Patients with external catheters had a relative risk of bacteremia of 3.7 (95% CI: 1.8-7.4) times the risk of those with internal catheters (P < 0.0001). A documented source for fever on exam was noted in 21% of patients but in none of the patients with bacteremia (P = 0.004). Empiric treatment with ceftriaxone was administered to 92% of the patients. Of the high-risk bacteremic infections (Gram-negative organisms, Streptococcus pneumoniae, viridans group streptococcus, and Staphylococcus aureus) 94% had at least an intermediate sensitivity to ceftriaxone.

Conclusions: Bacteremia is an important issue in febrile nonneutropenic pediatric oncology patients occurring in 6% of the patient visits in this study. The overall sensitivity of high-risk bacteremia to ceftriaxone provides justification for its empiric use in outpatient febrile nonneutropenic pediatric oncology patients.