Maria Pasali, Styliani Taka, Caterina Chliva, Alexandros Katoulis, Michael Makris
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Case of Polyethylene Glycol Allergy Confirmed with Basophil Activation Test and Oral Challenge Successfully Immunized with SARS-CoV-2 Vaccine.
Polyethylene glycols (PEG) or macrogols are polymers of ethylene oxide widely used in drugs either as active substances or, more commonly, as excipients. We report a Caucasian 32-year-old woman with referred anaphylaxis almost instantly after oral intake of a macrogol-containing laxative. Despite an anaphylactic reaction, the patient showed negative results for both the skin test and specific IgE to monomer, while the basophil activation test and oral challenge were positive. The patient was later successfully vaccinated with a polysorbate 80-containing SARS-CoV-2 vaccine following an additional work-up. As a result, the inactive form of PEG cannot be fully diagnosed, and it is considered a "hidden" allergen. Allergens like polysorbates need special consideration due to their possible cross-reactivity by their specific derivatives.
期刊介绍：
The Iranian Journal of Allergy, Asthma and Immunology (IJAAI), an international peer-reviewed scientific and research journal, seeks to publish original papers, selected review articles, case-based reviews, and other articles of special interest related to the fields of asthma, allergy and immunology. The journal is an official publication of the Iranian Society of Asthma and Allergy (ISAA), which is supported by the Immunology, Asthma and Allergy Research Institute (IAARI) and published by Tehran University of Medical Sciences (TUMS). The journal seeks to provide its readers with the highest quality materials published through a process of careful peer reviews and editorial comments. All papers are published in English.
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