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To test or not to test: Lessons learned from screening infants for peanut allergy.

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Screening infants for peanut allergy (PA) before introduction may identify those with existing allergies. However, the clinical benefit of this screening approach remains uncertain, necessitating ongoing infant monitoring.

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Area of Science:

  • Pediatric Allergy
  • Immunology
  • Dermatology

Background:

  • Trend towards forgoing peanut allergy (PA) screening in high-risk infants.
  • Need to understand implications of pre-introduction PA screening.
  • Focus on outcomes of infants undergoing PA skin testing.

Purpose of the Study:

  • Characterize outcomes of infants undergoing PA skin testing.
  • Evaluate demographic and clinical factors associated with PA.
  • Assess safety and outcomes of oral food challenges.

Main Methods:

  • Retrospective chart review (July 2017 - December 2020).
  • Inclusion of infants with peanut skin-prick tests in a tertiary allergy clinic.
  • Data collection on demographics, clinical characteristics, PA status, and tolerance.

Main Results:

  • 20% of screened infants had PA.
  • PA infants were older, had other IgE allergies, and used stronger topical steroids.
  • Oral food challenges were safe; many PA infants developed tolerance.
  • 5% of initially tolerant infants developed new PA.

Conclusions:

  • PA is linked to severe atopic dermatitis and other IgE-mediated food allergies.
  • The benefit of pre-introduction infant screening for PA is unclear.
  • Monitoring for PA resolution in infants is crucial.