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ICU TopicsInfectious Diseases

ICU · Infectious Diseases

Neutropenic sepsis (febrile neutropenia)

Also known as Febrile neutropenia · Neutropenic sepsis · Neutropenic fever · Chemotherapy-induced neutropenia · MASCC risk index · Anti-pseudomonal coverage · Neutropenic enterocolitis · Typhlitis

Febrile neutropenia is a potentially life-threatening complication of anticancer chemotherapy. IDSA 2010: treat fever and neutropenia swiftly and broadly for gram-positive and gram-negative pathogens. ASCO/IDSA 2018 (Taplitz) and Flowers 2013: initial empirical antibacterials within 1 hour of triage. SSC 2021: antimicrobials immediately, ideally within 1 h of recognition for possible shock; ≥30 mL/kg crystalloid within the first 3 h. ICU delay of 1 hour in neutropenic severe sepsis associated with OR of death of 10. Critically ill cancer patients: unadjusted mortality ~60% with neutropenia vs ~47% without (gap disappears after severity adjustment). Empiric anti-pseudomonal beta-lactam (pip-taz, anti-pseudomonal cephalosporin, or carbapenem). MASCC ≥21 PPV 91% for low risk. Walsh: caspofungin 33.9% vs L-AmB 33.7% as empirical antifungal. G-CSF is prophylaxis (Kuderer FN RR 0.54; ASCO ~20% FN-risk regimens).

high25 referencesUpdated 3 Sept 202616 min readSource-verified · Sept 2026

Checked against its sources on 3 Sept 2026

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Red flags

  • Fever and neutropenia: empirical antibacterials within 1 hour of triage (Taplitz/Flowers). SSC 2021: within 1 h for suspected shock. ICU delay of 1 h associated with OR of death of 10.
  • Treat fever and neutropenia swiftly and broadly for gram-positive and gram-negative pathogens (Freifeld). Numeric ANC/fever cut-offs are not quoted from the fetched Freifeld abstract.
  • Empiric anti-pseudomonal beta-lactam: piperacillin-tazobactam, an anti-pseudomonal cephalosporin, or a carbapenem. Never ceftriaxone as the sole agent.
  • Never ceftriaxone as the sole empiric agent — it has no anti-pseudomonal activity.
  • Early source control includes removal of an infected catheter. Vancomycin is the historical MRSA agent if colonised or high risk — not universal.
  • Persistent fever: hunt invasive fungus (CT, galactomannan). Walsh: caspofungin 33.9% vs L-AmB 33.7% as empirical antifungal (non-inferior; less nephrotoxicity 2.6 vs 11.5%). Breakthrough rates similar.
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Red flags

  • Fever and neutropenia: empirical antibacterials within 1 hour of triage (Taplitz/Flowers). SSC 2021: within 1 h for suspected shock. ICU delay of 1 h associated with OR of death of 10.
  • Treat fever and neutropenia swiftly and broadly for gram-positive and gram-negative pathogens (Freifeld). Numeric ANC/fever cut-offs are not quoted from the fetched Freifeld abstract.
  • Empiric anti-pseudomonal beta-lactam: piperacillin-tazobactam, an anti-pseudomonal cephalosporin, or a carbapenem. Never ceftriaxone as the sole agent.
  • Never ceftriaxone as the sole empiric agent — it has no anti-pseudomonal activity.
  • Early source control includes removal of an infected catheter. Vancomycin is the historical MRSA agent if colonised or high risk — not universal.
  • Persistent fever: hunt invasive fungus (CT, galactomannan). Walsh: caspofungin 33.9% vs L-AmB 33.7% as empirical antifungal (non-inferior; less nephrotoxicity 2.6 vs 11.5%). Breakthrough rates similar.
In one line

Febrile neutropenia is a potentially life-threatening chemotherapy complication. IDSA 2010: treat swiftly and broadly. ASCO/IDSA: initial empirical antibacterials within 1 hour of triage. SSC 2021: antimicrobials immediately, ideally within 1 h of recognition for possible shock; ≥30 mL/kg crystalloid within 3 h. In ICU neutropenic severe sepsis a 1-hour delay was associated with OR of death of 10. Empiric anti-pseudomonal beta-lactam (pip-taz, anti-pseudomonal cephalosporin, or carbapenem) — never ceftriaxone as the sole agent. MASCC ≥21 PPV 91% for low risk. Walsh: caspofungin 33.9% vs L-AmB 33.7% as empirical antifungal (less nephrotoxicity 2.6 vs 11.5%; breakthrough similar). G-CSF is prophylaxis (Kuderer FN RR 0.54; ASCO ~20% FN-risk regimens), not the shock drug.

[1] [2] [4] [14] [24] [25] [8] [11] [9] [23]

Febrile neutropenia — sourced numbers

1 hTriage to first antibioticTaplitz/Flowers ASCO/IDSA
OR 10ICU 1-hour delayMokart via Nates
60% vs 47%Unadjusted ICU mortalityBouteloup; gap vanishes after adjustment
91%MASCC ≥21 PPVKlastersky derivation n=756
[2] [4] [24] [23] [25]
Red flagDo not use ceftriaxone as the sole empiric agent — it has no anti-pseudomonal activity. Use piperacillin-tazobactam, an anti-pseudomonal cephalosporin, or a carbapenem.
[24] [1]
Definition

ASCO/IDSA: initial empirical antibacterials within 1 hour of triage. SSC 2021: antimicrobials immediately, ideally within 1 h for possible shock. In ICU neutropenic severe sepsis, a 1-hour delay was associated with an odds ratio of death of 10.

[2] [14] [24]
Neutropenia is not an ICU-refusal criterion

Unadjusted mortality in critically ill cancer patients is about 60% with neutropenia versus 47% without (38 studies). That 10% excess disappeared after adjustment for severity of illness — do not refuse ICU on neutropenia alone.

[23]

Meet the patient

A 52-year-old woman with relapsed multiple myeloma is day 9 after high-dose melphalan conditioning and an autologous stem-cell transplant. She presents to the high-dependency unit with fever 39.6C, rigors and confusion, and a two-centimetre haemorrhagic necrotic ulcer with an erythematous halo in the right axilla. Neutrophils 0.05, platelets 18, lactate 4.8, MAP 52. She has a tunnelled central line and is on levofloxacin and aciclovir prophylaxis.[1]

The two questions that decide her next hour: has the anti-pseudomonal beta-lactam been given within 1 hour of triage? and does the regimen cover Pseudomonas? (the axillary lesion is ecthyma gangrenosum — Pseudomonas vasculitis). Hold those two and everything below slots into place.[2][24]

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References25ShowHide
  1. [1]Freifeld AG, Bow EJ, Sepkowitz KA, Boeckh MJ, et al. Clinical practice guideline for the use of antimicrobial agents in neutropenic patients with cancer: 2010 update by the infectious diseases society of america Clin Infect Dis, 2011.PMID 21258094
  2. [2]Taplitz RA, Kennedy EB, Bow EJ, Crews J, et al. Outpatient Management of Fever and Neutropenia in Adults Treated for Malignancy: American Society of Clinical Oncology and Infectious Diseases Society of America Clinical Practice Guideline Update J Clin Oncol, 2018.PMID 29461916
  3. [3]Klastersky J, Paesmans M. The Multinational Association for Supportive Care in Cancer (MASCC) risk index score: 10 years of use for identifying low-risk febrile neutropenic cancer patients Support Care Cancer, 2013.PMID 23443617
  4. [4]Flowers CR, Seidenfeld J, Bow EJ, Karten C, et al. Antimicrobial prophylaxis and outpatient management of fever and neutropenia in adults treated for malignancy: American Society of Clinical Oncology clinical practice guideline J Clin Oncol, 2013.PMID 23319691
  5. [5]Patterson TF, Thompson GR 3rd, Denning DW, Fishman JA, et al. Practice Guidelines for the Diagnosis and Management of Aspergillosis: 2016 Update by the Infectious Diseases Society of America Clin Infect Dis, 2016.PMID 27365388
  6. [6]Pappas PG, Kauffman CA, Andes DR, Clancy CJ, et al. Clinical Practice Guideline for the Management of Candidiasis: 2016 Update by the Infectious Diseases Society of America Clin Infect Dis, 2016.PMID 26679628
  7. [7]Herbrecht R, Denning DW, Patterson TF, Bennett JE, et al. Voriconazole versus amphotericin B for primary therapy of invasive aspergillosis N Engl J Med, 2002.PMID 12167683
  8. [8]Walsh TJ, Teppler H, Donowitz GR, Maertens JA, et al. Caspofungin versus liposomal amphotericin B for empirical antifungal therapy in patients with persistent fever and neutropenia N Engl J Med, 2004.PMID 15459300
  9. [9]Smith TJ, Bohlke K, Lyman GH, Carson KR, et al. Recommendations for the Use of WBC Growth Factors: American Society of Clinical Oncology Clinical Practice Guideline Update J Clin Oncol, 2015.PMID 26169616
  10. [10]Bohlius J, Herbst C, Reiser M, Schwarzer G, et al. Granulopoiesis-stimulating factors to prevent adverse effects in the treatment of malignant lymphoma Cochrane Database Syst Rev, 2008.PMID 18843642
  11. [11]Kuderer NM, Dale DC, Crawford J, Lyman GH. Impact of primary prophylaxis with granulocyte colony-stimulating factor on febrile neutropenia and mortality in adult cancer patients receiving chemotherapy: a systematic review J Clin Oncol, 2007.PMID 17634496
  12. [12]Lee DW, Gardner R, Porter DL, Louis CU, et al. Current concepts in the diagnosis and management of cytokine release syndrome Blood, 2014.PMID 24876563
  13. [13]Carmona-Bayonas A, Jiménez-Fonseca P, Virizuela Echaburu J, et al. Prediction of serious complications in patients with seemingly stable febrile neutropenia: validation of the Clinical Index of Stable Febrile Neutropenia in a prospective cohort of patients from the FINITE study J Clin Oncol, 2015.PMID 25559804
  14. [14]Evans L, Rhodes A, Alhazzani W, Antonelli M, et al. Surviving sepsis campaign: international guidelines for management of sepsis and septic shock 2021 Intensive Care Med, 2021.PMID 34599691
  15. [15]Cornely OA, Alastruey-Izquierdo A, Arenz D, Chen SCA, et al. Global guideline for the diagnosis and management of mucormycosis: an initiative of the European Confederation of Medical Mycology in cooperation with the Mycoses Study Group Education and Research Consortium Lancet Infect Dis, 2019.PMID 31699664
  16. [16]Marty FM, Ostrosky-Zeichner L, Cornely OA, Mullane KM, et al. Isavuconazole treatment for mucormycosis: a single-arm open-label trial and case-control analysis Lancet Infect Dis, 2016.PMID 26969258
  17. [17]Pfeiffer CD, Fine JP, Safdar N. Diagnosis of invasive aspergillosis using a galactomannan assay: a meta-analysis Clin Infect Dis, 2006.PMID 16619154
  18. [18]Karageorgopoulos DE, Vouloumanou EK, Ntziora F, et al. β-D-glucan assay for the diagnosis of invasive fungal infections: a meta-analysis Clin Infect Dis, 2011.PMID 21367728
  19. [19]Cornely OA, Maertens J, Winston DJ, Perfect J, et al. Posaconazole vs. fluconazole or itraconazole prophylaxis in patients with neutropenia N Engl J Med, 2007.PMID 17251531
  20. [20]van Burik JA, Ratanatharathorn V, Stepan DE, Miller CB, et al. Micafungin versus fluconazole for prophylaxis against invasive fungal infections during neutropenia in patients undergoing hematopoietic stem cell transplantation Clin Infect Dis, 2004.PMID 15546073
  21. [21]Goodman JL, Winston DJ, Greenfield RA, Chandrasekar PH, et al. A controlled trial of fluconazole to prevent fungal infections in patients undergoing bone marrow transplantation N Engl J Med, 1992.PMID 1542320
  22. [22]Marty FM, Ljungman P, Chemaly RF, Maertens J, et al. Letermovir Prophylaxis for Cytomegalovirus in Hematopoietic-Cell Transplantation N Engl J Med, 2017.PMID 29211658
  23. [23]Bouteloup M, Perinel S, Bourmaud A, et al. Outcomes in adult critically ill cancer patients with and without neutropenia: a systematic review and meta-analysis of the Groupe de Recherche en Réanimation Respiratoire en Onco-Hématologie (GRRR-OH) Oncotarget, 2017.PMID 27661125
  24. [24]Nates JL, Pène F, Darmon M, et al. Septic shock in the immunocompromised cancer patient: a narrative review Crit Care, 2024.PMID 39215292
  25. [25]Klastersky J, Paesmans M, Rubenstein EB, et al. The Multinational Association for Supportive Care in Cancer risk index: A multinational scoring system for identifying low-risk febrile neutropenic cancer patients J Clin Oncol, 2000.PMID 10944139

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