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Babesiosis

Last reviewed: 15 Sep 2025
Last updated: 06 Jun 2023

Summary

Definition

History and exam

Other diagnostic factors

  • constitutional symptoms
  • pyrexia
  • jaundice
  • hepatosplenomegaly
  • petechiae, splinter hemorrhages, or ecchymoses
  • dark urine
  • conjunctival injection
  • cough
  • sore throat
  • photophobia
Full details

Risk factors

  • residence in or travel to an endemic region
  • exposure to Ixodes scapularis ticks
  • blood transfusion
  • asplenia
  • immunosuppression
  • age >50 years
  • Lyme disease
  • human granulocytic anaplasmosis
  • maternal infection during pregnancy
Full details

Diagnostic investigations

1st investigations to order

  • peripheral blood smear (Giemsa or Wright stained)
  • polymerase chain reaction for babesial DNA
  • CBC
  • LFTs
  • serum creatinine and blood urea nitrogen (BUN)
  • urinalysis
  • ELISA and/or immunofluorescence assay for Lyme disease
  • polymerase chain reaction and/or immunofluorescence assay or buffy coat smear for human granulocytic anaplasmosis
Full details

Investigations to consider

  • indirect immunofluorescence antibody assay for Babesia microti
  • IgG/IgM immunoblot for Lyme disease
  • HIV serology
Full details

Treatment algorithm

ACUTE

asymptomatic documented infection

mild to moderate disease

acute severe disease

ONGOING

recurrent or refractory disease

Contributors

Authors

Sarah Hochman, MD

Assistant Professor

Department of Medicine

Division of Infectious Diseases and Immunology

New York University School of Medicine

New York

NY

Declarações

SH declares that she has no competing interests.

Louis Weiss, MD, MPH
Louis Weiss

Professor of Medicine

Division of Infectious Diseases

Professor of Pathology

Division of Parasitology and Tropical Medicine

Albert Einstein College of Medicine

Bronx

NY

Declarações

LW has received grant funding from the National Institute of Allergy and Infectious Diseases. He is also the author of references cited in this topic.

Revisores

Jeremy Gray, BSc, MSc, PhD

Professor

Department of Environmental Resource Management

University College Dublin

Belfield

Dublin

Republic of Ireland

Declarações

JG declares that he has no competing interests.

Sam Telford III, ScD

Associate Professor of Biomedical Sciences

Division of Infectious Diseases

Cummings School of Veterinary Medicine

Tufts University

Boston

MA

Declarações

ST has active research funding from the NIH. ST is an author or co-author of numerous primary publications on the biology of babesiosis, as well as reviews that have been referenced in this topic.

Raymond J. Dattwyler, MD

Professor of Medicine and Microbiology/Immunology

Chief of Allergy, Immunology and Rheumatology

New York Medical College

Valhalla

NY

Declarações

RJD declares that he has no competing interests.

Créditos aos pareceristas

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Referências

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Principais artigos

Vannier E, Krause PJ. Human babesiosis. N Engl J Med. 2012;366:2397-2407. Resumo

Centers for Disease Control and Prevention. Tickborne diseases of the United States: a reference manual for health care providers, sixth edition. Aug 2022 [internet publication].Texto completo

Krause PJ, Auwaerter PG, Bannuru RR, et al. Clinical practice guidelines by the Infectious Diseases Society of America (IDSA): 2020 guideline on diagnosis and management of Babesiosis. Clin Infect Dis. 2021 Jan 27;72(2):e49-e64.Texto completo  Resumo

Sanchez E, Vannier E, Wormser GP, et al. Diagnosis, treatment, and prevention of Lyme disease, human granulocytic anaplasmosis, and babesiosis: a review. JAMA. 2016;315:1767-77. Resumo

Artigos de referência

Uma lista completa das fontes referenciadas neste tópico está disponível para os usuários com acesso total ao BMJ Best Practice.
  • Babesiosis images
  • Diagnósticos diferenciais

    • Lyme disease
    • Human granulocytic anaplasmosis
    • Rocky Mountain spotted fever
    Mais Diagnósticos diferenciais
  • Diretrizes

    • Tickborne diseases of the United States: a reference manual for health care providers
    • 2020 Guideline on diagnosis and management of babesiosis
    Mais Diretrizes
  • Folhetos informativos para os pacientes

    Lyme disease

    Malaria prevention

    Mais Folhetos informativos para os pacientes
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