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Botulismo

Last reviewed: 22 Jan 2026
Last updated: 15 Apr 2025

Summary

Definition

History and exam

Key diagnostic factors

  • presença de fatores de risco
  • visão turva e diplopia
  • acomodação deficiente
  • ptose
  • fraqueza óculo-bulbar
  • fraqueza da área hipoglossa
  • disartria
  • disfagia
  • paralisia flácida descendente simétrica
Full details

Other diagnostic factors

  • hipotonia
  • dificuldades na alimentação em lactentes
  • choro enfraquecido em lactentes
  • hipotermia
  • retenção urinária
  • constipação
  • ressecamento da boca e garganta
  • hipotensão postural
  • doença gastrointestinal
  • reflexos tendinosos profundos diminuídos ou ausentes
  • ausência de febre
  • disfunção respiratória
  • dilatação pupilar
Full details

Risk factors

  • ingestão de alimentos contaminados
  • ingestão de mel por lactentes
  • ingestão de solo em lactentes
  • uso de substâncias por via intravenosa
  • lesão por esmagamento
  • faixa etária de lactentes
  • anatomia intestinal anormal
  • uso terapêutico ou cosmético da toxina botulínica
  • terrorismo biológico
  • exposição a répteis
Full details

Diagnostic tests

1st tests to order

  • bioensaio em camundongos de amostras séricas, secreções gástricas, fezes e alimentos
  • cultura de amostras de alimentos, aspirados gástricos ou materiais fecais
Full details

Tests to consider

  • teste eletrofisiológico
Full details

Emerging tests

  • ensaio de imunoadsorção enzimática (ELISA)
  • reação em cadeia da polimerase

Treatment algorithm

ACUTE

botulismo de origem alimentar

botulismo de ferida

botulismo iatrogênico

botulismo inalatório (ataque biológico)

Contributors

Authors

Linda S. Nield, MD, FAAP
Linda S. Nield

Professor of Pediatrics and Medical Education

West Virginia University School of Medicine

Morgantown

WV

Disclosures

LSN is an author of a reference cited in this topic.

Acknowledgements

Dr Linda S. Nield would like to gratefully acknowledge Dr Thomas P. Bleck, Dr Aimee Hodowanec, Dr Pavani Reddy, and Dr Teresa Zembower, previous contributors to this topic.

Disclosures

TPB, AH, PR, and TZ declare that they have no competing interests.

Peer reviewers

Fiona Cooke, MA, PhD, MSc, FRCPath, MRCP, DTM&H

Research Fellow and Medical Microbiologist

Wellcome Trust Sanger Institute

Department of Microbiology

Addenbrooke's Hospital

Cambridge

UK

Disclosures

FC declares that she has no competing interests.

Christopher D. Huston, MD

Assistant Professor of Medicine

Division of Infectious Diseases

University of Vermont College of Medicine

Burlington

VT

Disclosures

CDH declares that he has no competing interests.

William A. Petri, Jr, MD, PhD, FACP

Chief and Professor of Medicine

Division of Infectious Diseases and International Health

University of Virginia Health System

Charlottesville

VA

Disclosures

WAP declares that he has no competing interests.

Peer reviewer acknowledgements

BMJ Best Practice topics are updated on a rolling basis in line with developments in evidence and guidance. The peer reviewers listed here have reviewed the content at least once during the history of the topic.

Disclosures

Peer reviewer affiliations and disclosures pertain to the time of the review.

References

Our in-house evidence and editorial teams collaborate with international expert contributors and peer reviewers to ensure that we provide access to the most clinically relevant information possible.

Key articles

Rao AK, Sobel J, Chatham-Stephens K, et al. Clinical Guidelines for Diagnosis and Treatment of Botulism, 2021. MMWR Recomm Rep. 2021 May 7;70(2):1-30.Full text  Abstract

Arnon SS, Schechter R, Inglesby TV, et al. Botulinum toxin as a biological weapon: medical and public health management. JAMA. 2001 Feb 28;285(8):1059-70. Abstract

Centers for Disease Control and Prevention (CDC). Investigational heptavalent botulinum antitoxin (HBAT) to replace licensed botulinum antitoxin AB and investigational botulinum antitoxin E. MMWR Morb Mortal Wkly Rep. 2010 Mar 19;59(10):299.Full text  Abstract

Arnon SS, Schechter R, Maslanka SE, et al. Human botulism immune globulin for the treatment of infant botulism. N Engl J Med. 2006 Feb 2;354(5):462-71.Full text  Abstract

Reference articles

A full list of sources referenced in this topic is available to users with access to all of BMJ Best Practice.
  • Botulismo images
  • Differentials

    • Síndrome de Guillain-Barré (GBS)
    • Miastenia gravis
    • Paralisia do carrapato (Dermacentor)
    More Differentials
  • Guidelines

    • Clinical guidelines for diagnosis and treatment of botulism, 2021
    • Botulism - guide for healthcare professionals
    More Guidelines
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