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  • Title: Three-day treatment with imipenem for unexplained fever during prolonged neutropaenia in haematology patients receiving fluoroquinolone and fluconazole prophylaxis: a prospective observational safety study.
    Author: Slobbe L, Waal Lv, Jongman LR, Lugtenburg PJ, Rijnders BJ.
    Journal: Eur J Cancer; 2009 Nov; 45(16):2810-7. PubMed ID: 19647995.
    Abstract:
    BACKGROUND: Guidelines advocate >7d of broad-spectrum antibiotics for unexplained fever (UF) during neutropaenia. However, effective antimicrobial prophylaxis reduces the incidence of gram-negative infections, which may allow shorter treatment. This study evaluates the safety of discontinuing empirical broad-spectrum antibiotics if no microbial source is documented after an initial work-up of 72 h. METHODS: Prospective observational study at a tertiary-care haematology-unit in patients suffering from haematologic malignancies and treatment-induced prolonged neutropaenia of 10d. Oral fluoroquinolone and fluconazole prophylaxis was given from day 1. Fever was empirically treated with imipenem which was discontinued after 72 h if, following a standardised protocol, no infectious aetiology was documented. Duration of fever, antimicrobial therapy and overall mortality were registered. RESULTS: One hundred and sixty six patients were evaluated during 276 neutropaenic episodes. One hundred and thirty six patients (82.5%) experienced 1 febrile episode. A total of 317 febrile episodes were observed, of which 177 (56%) were diagnosed as UF. In 135 febrile episodes (43%), a probable/definite infectious origin was documented. Mean duration of fever in neutropaenic periods with 1 febrile episode was 5d, and mean time of treatment with imipenem was 4.7d. In patients without documented infection, mean time of imipenem treatment was only 3.7d. Overall mortality 30 d after neutrophil recovery was 3.6% (6/166); no patient died from untreated bacterial infection. CONCLUSION: Discontinuation of broad-spectrum antibiotics during neutropaenia in haematology patients on fluoroquinolone and fluconazole prophylaxis is safe, provided that no infectious aetiology is established after 72 h.
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