An atypical presentation of non-IgE-mediated cow’s milk allergy associated with Staphylococcus aureus: A case study

Main Article Content

T Mabelane
MC Khaba
E Kirangu

Abstract

Cow’s milk allergy (CMA) is one of the most common food allergies in the first years of life. CMA is classified as immunoglobulin E (IgE)
or non-IgE-mediated reactions. IgE-mediated reactions are typically of immediate onset, with symptoms manifesting within 2 hours after ingestion. However, non-IgE-mediated reactions are delayed and mostly occur between 2 and 48 hours post exposure. This report describes a 17-year-old who presented with a long-standing history of pustular lesions immediately after cow’s milk ingestion. Allergy tests, which included skin-prick test (SPT); specific IgE to cow’s milk; cow’s milk IgE components; and Cellular antigen stimulation test (CAST) yielded insignificant results. However, an oral food challenge resulted in pustular lesions and abdominal pain within 30 and 120 minutes, respectively. A swab from a pustule cultured Staphylococcus aureus. CMA was confirmed and managed with dietary restriction. It is uncommon for non- IgE reactions to occur with immediate symptoms. S. aureus may be associated with atypical skin manifestation of CMA.

Article Details

Section

Case report

How to Cite

An atypical presentation of non-IgE-mediated cow’s milk allergy associated with Staphylococcus aureus: A case study. (2023). South African Journal of Child Health, 17(1), 41-42. https://doi.org/10.7196/SAJCH.2023.v17i1.1884

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