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Alergia alimentar

Última revisão: 14 Sep 2025
Última atualização: 21 May 2024

Resumo

Definição

História e exame físico

Principais fatores diagnósticos

  • presença de fatores de risco
  • ingestão de leite, ovos, nozes, peixe, marisco, trigo ou soja
  • sintomas reprodutíveis
  • rubor, urticária ou angioedema cutâneo
  • espirros, rinorreia ou congestão nasal
  • dispneia, taquipneia, sibilância, tosse ou cianose
  • rouquidão, estridor ou sensação de sufocamento
  • náuseas e vômitos
  • cólica ou distensão abdominal
  • diarreia
  • hiperemia conjuntival ou lacrimejamento
  • edema periorbital
  • início abrupto dos sintomas
  • reação causada por uma pequena quantidade de alimento
  • presença de outras doenças alérgicas
  • edema laríngeo
Detalhes completos

Outros fatores diagnósticos

  • taquicardia ou bradicardia
  • reação exacerbada por exercícios ou esforço físico
  • ingestão de medicamentos ou de bebidas alcoólicas antes da reação
  • arritmia cardíaca
  • hipotensão
Detalhes completos

Fatores de risco

  • história familiar de alergia alimentar
  • dermatite atópica
  • neonatos
  • exposição perinatal a óleo de amendoim
Detalhes completos

Diagnostic investigations

1st investigations to order

  • imunoensaio da imunoglobulina E (IgE) específica in vitro
  • teste alérgico cutâneo por puntura ("prick test")
Full details

Investigations to consider

  • testes de desencadeamento alimentar
  • diagnósticos resolvidos por componentes
Full details

Emerging tests

  • testes de adesivo atópico

Treatment algorithm

ACUTE

reação anafilática

sintomas cutâneos

broncoespasmo

rinoconjuntivite

ONGOING

após a estabilização

Contributors

Authors

A. Wesley Burks, MD
A. Wesley Burks

Curnen Distinguished Professor and Chair

Department of Pediatrics

University of North Carolina

Chapel Hill

NC

Disclosures

AWB receives grant support to his institution from the National Institutes of Health and the Burroughs Wellcome Fund; royalties from UpToDate, Elsevier, and Walter Kluwer; consulting honorariums from Astella Pharma Global Development, Allergy Therapeutics (UK) Ltd, DBV Technologies, Kaléo, N-Fold, LLC, ALK-Abelló Inc, and UKKO Inc, as well as Aimmune Therapeutics, Consortia TX Inc, and Prota Therapeutics for his service on their respective scientific advisory boards. AWB owns stock in Allertein and Mastcell Pharmaceuticals. These interests do not directly relate to this topic but are being shared for full disclosure. AWB is an author of several references cited in this topic.

J. Andrew Bird, MD

Associate Professor

Department of Pediatrics

Division of Allergy and Immunology

University of Texas Southwestern Medical Center

Dallas

TX

Disclosures

JAB consults for AllerGenis, Allergy Therapeutics Ltd, Before Brands, DBV Technologies, Genentech, and Novartis. He receives grant funding to his institution from Aimmune, DBV Technologies, Genentech, HIH-NIAD, Novartic, Siolta, and Regeneron. JAB is the author of one reference cited in this topic.

Peer reviewers

Justin Skripak, MD

Assistant Professor of Pediatric Allergy and Immunology

Mount Sinai School of Medicine

New York

NY

Disclosures

JS declares that he has no competing interests.

Hugh A. Sampson, MD

Professor of Pediatrics

Mount Sinai School of Medicine

New York

NY

Disclosures

HAS holds a 4% interest in a biotech company, Allertein Pharmaceuticals LLC, which is developing an engineered recombinant protein vaccine for peanut allergy, and 45% interest in a virtual company, Herbal Springs LLC, that holds a patent application on a herbal product for treating asthma and another for treating food allergy. HAS is an author of several references cited in this topic.

Adam Fox, MA(Hons) Cantab., MSc, MBBS, DCH, FRCPCH, FHEA, Dip. Allergy

Consultant and Honorary Senior Lecturer in Paediatric Allergy

Evelina Children's Hospital

Guy's & St Thomas' Hospitals NHS Foundation Trust

London

UK

Disclosures

AF 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

Chafen JJ, Newberry SJ, Riedl MA, et al. Diagnosing and managing common food allergies: a systematic review. JAMA. 2010 May 12;303(18):1848-56. Abstract

Sicherer SH, Sampson HA. Food allergy: recent advances in pathophysiology and treatment. Annu Rev Med. 2009 Feb;60:261-77. Abstract

Greer FR, Sicherer SH, Burks AW, et al. The effects of early nutritional interventions on the development of atopic disease in infants and children: the role of maternal dietary restriction, breastfeeding, hydrolyzed formulas, and timing of introduction of allergenic complementary foods. Pediatrics. 2019 Apr;143(4):e20190281.Full text  Abstract

Muraro A, Halken S, Arshad SH, et al. EAACI food allergy and anaphylaxis guidelines: primary prevention of food allergy. Allergy. 2014 May;69(5):590-601.Full text  Abstract

Sampson HA, Gerth van Wijk R, Bindslev-Jensen C, et al. Standardizing double-blind, placebo-controlled oral food challenges: American Academy of Allergy, Asthma & Immunology-European Academy of Allergy and Clinical Immunology PRACTALL consensus report. J Allergy Clin Immunol. 2012 Dec;130(6):1260-74.Full text  Abstract

Heyman MB. American Academy of Pediatrics, Committee on Nutrition. Lactose intolerance in infants, children, and adolescents. Pediatrics. 2006 Sep;118(3):1279-86.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.
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