Despite a known diagnosis of food allergy, accidental ingestions continue to occur.
Objective
To characterize accidental ingestions, including prevalence, risk factors, food allergen triggers, and severity of reactions.
Methods
A prospective monthly survey developed by the Food Allergy Consortium at Northwestern University was administered to parents of food-allergic children between April 2015 and April 2017. The monthly survey included questions on any allergic reactions experienced in the previous month. In addition, chart reviews of 100 pediatric participants from Lurie Children’s Hospital of Chicago allergy clinics (typical clinical encounters) were compared with the prospective survey results.
Results
A total of 196 survey participants and 100 retrospective review subjects were analyzed—31.1% of participants from the surveyed cohort and 19.0% of participants from the retrospective review reported at least 1 accidental ingestion over 1 year. The rate of accidental ingestions reported in the prospective survey was high: 10% to 25% of participants each month reported an accidental ingestion, and multiple ingestions were common. Common triggers were milk, wheat, and tree nuts. In the retrospective cohort, the highest rate of accidental ingestion (25.0%) occurred for milk, followed by sesame (20.0%) and egg (18.8%). Rates of anaphylaxis after exposure were high in both the prospective and retrospective cohorts (33.1% and 16.7%, respectively).
Conclusions
Accidental ingestion rates were high among food-allergic patients. Multiple exposures, especially to milk, were common. Incidence of anaphylaxis was also high, suggesting that ongoing patient education on allergen avoidance and accidental exposure is imperative.
{"title":"Prevalence and Characteristics of Accidental Ingestions Among Pediatric Food Allergy Patients","authors":"Cynhia Hsu BS , Shweta Hosakoppal MD , Meagan Yong MS, MPH , Ruchi Gupta MD , Melanie Makhija MD , Anne Marie Singh MD","doi":"10.1016/j.jaip.2024.08.006","DOIUrl":"10.1016/j.jaip.2024.08.006","url":null,"abstract":"<div><h3>Background</h3><div>Despite a known diagnosis of food allergy, accidental ingestions continue to occur.</div></div><div><h3>Objective</h3><div>To characterize accidental ingestions, including prevalence, risk factors, food allergen triggers, and severity of reactions.</div></div><div><h3>Methods</h3><div>A prospective monthly survey developed by the Food Allergy Consortium at Northwestern University was administered to parents of food-allergic children between April 2015 and April 2017. The monthly survey included questions on any allergic reactions experienced in the previous month. In addition, chart reviews of 100 pediatric participants from Lurie Children’s Hospital of Chicago allergy clinics (typical clinical encounters) were compared with the prospective survey results.</div></div><div><h3>Results</h3><div>A total of 196 survey participants and 100 retrospective review subjects were analyzed—31.1% of participants from the surveyed cohort and 19.0% of participants from the retrospective review reported at least 1 accidental ingestion over 1 year. The rate of accidental ingestions reported in the prospective survey was high: 10% to 25% of participants <em>each month</em> reported an accidental ingestion, and multiple ingestions were common. Common triggers were milk, wheat, and tree nuts. In the retrospective cohort, the highest rate of accidental ingestion (25.0%) occurred for milk, followed by sesame (20.0%) and egg (18.8%). Rates of anaphylaxis after exposure were high in both the prospective and retrospective cohorts (33.1% and 16.7%, respectively).</div></div><div><h3>Conclusions</h3><div>Accidental ingestion rates were high among food-allergic patients. Multiple exposures, especially to milk, were common. Incidence of anaphylaxis was also high, suggesting that ongoing patient education on allergen avoidance and accidental exposure is imperative.</div></div>","PeriodicalId":51323,"journal":{"name":"Journal of Allergy and Clinical Immunology-In Practice","volume":"12 11","pages":"Pages 3089-3095.e2"},"PeriodicalIF":8.2,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141914513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-01DOI: 10.1016/j.jaip.2024.09.011
Whitney W. Stevens MD, PhD , Joaquim Mullol MD, PhD
{"title":"NSAID-Exacerbated Respiratory Disease—A Century of Discovery and Innovation","authors":"Whitney W. Stevens MD, PhD , Joaquim Mullol MD, PhD","doi":"10.1016/j.jaip.2024.09.011","DOIUrl":"10.1016/j.jaip.2024.09.011","url":null,"abstract":"","PeriodicalId":51323,"journal":{"name":"Journal of Allergy and Clinical Immunology-In Practice","volume":"12 11","pages":"Pages 2945-2946"},"PeriodicalIF":8.2,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142632220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-01DOI: 10.1016/j.jaip.2024.08.015
Leonard Bielory MD
{"title":"The Link Between Allergic Rhinitis and Keratoconus: A Call for Greater Awareness, Early Intervention, and Future Ocular Surface Diagnostic Tools","authors":"Leonard Bielory MD","doi":"10.1016/j.jaip.2024.08.015","DOIUrl":"10.1016/j.jaip.2024.08.015","url":null,"abstract":"","PeriodicalId":51323,"journal":{"name":"Journal of Allergy and Clinical Immunology-In Practice","volume":"12 11","pages":"Pages 3105-3106"},"PeriodicalIF":8.2,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142632245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-01DOI: 10.1016/j.jaip.2024.10.005
{"title":"Systemic Therapies for Atopic Dermatitis","authors":"","doi":"10.1016/j.jaip.2024.10.005","DOIUrl":"10.1016/j.jaip.2024.10.005","url":null,"abstract":"","PeriodicalId":51323,"journal":{"name":"Journal of Allergy and Clinical Immunology-In Practice","volume":"12 11","pages":"Page 3175"},"PeriodicalIF":8.2,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-01DOI: 10.1016/S2213-2198(24)01006-7
{"title":"May 2024 Practice Notes","authors":"","doi":"10.1016/S2213-2198(24)01006-7","DOIUrl":"10.1016/S2213-2198(24)01006-7","url":null,"abstract":"","PeriodicalId":51323,"journal":{"name":"Journal of Allergy and Clinical Immunology-In Practice","volume":"12 11","pages":"Pages A21-A22"},"PeriodicalIF":8.2,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142662908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-01DOI: 10.1016/j.jaip.2024.06.044
Nicholas R. Rowan MD , Claire Hopkins DM , Rodney J. Schlosser MD , Zachary M. Soler MD
Nonsteroidal anti-inflammatory drug-exacerbated respiratory disease (NSAID-ERD) presents a significant challenge in clinical management owing to recalcitrant disease with accompanying profound impacts on patient quality of life. Although asthma represents a significant component of this disease, quality of life disruptions are driven primarily by recalcitrant sinonasal problems, olfactory dysfunction, and the associated psychosocial and dietary implications. This review delves into specific quality of life metrics used to assess NSAID-ERD and the associated health care burden and financial implications of this disease, offering insights into the comparative challenges in chronic rhinosinusitis with nasal polyps when available. The article reviews the associated costs and cost-effectiveness of NSAID-ERD–directed therapies, including endoscopic sinus surgery, aspirin desensitization, and biologic therapy. Although some of these emerging treatment approaches show promise, they also present numerous unanswered questions, reflecting the dynamic nature of this field. As the landscape of NSAID-ERD management continues to evolve, this review provides insights into the challenges faced by clinicians and underscores the need for further research to optimize patient care and quality of life outcomes.
{"title":"The Burden of Nonsteroidal Anti-Inflammatory Drug-Exacerbated Respiratory Disease: Interplay Between Quality of Life and Economic Implications","authors":"Nicholas R. Rowan MD , Claire Hopkins DM , Rodney J. Schlosser MD , Zachary M. Soler MD","doi":"10.1016/j.jaip.2024.06.044","DOIUrl":"10.1016/j.jaip.2024.06.044","url":null,"abstract":"<div><div>Nonsteroidal anti-inflammatory drug-exacerbated respiratory disease (NSAID-ERD) presents a significant challenge in clinical management owing to recalcitrant disease with accompanying profound impacts on patient quality of life. Although asthma represents a significant component of this disease, quality of life disruptions are driven primarily by recalcitrant sinonasal problems, olfactory dysfunction, and the associated psychosocial and dietary implications. This review delves into specific quality of life metrics used to assess NSAID-ERD and the associated health care burden and financial implications of this disease, offering insights into the comparative challenges in chronic rhinosinusitis with nasal polyps when available. The article reviews the associated costs and cost-effectiveness of NSAID-ERD–directed therapies, including endoscopic sinus surgery, aspirin desensitization, and biologic therapy. Although some of these emerging treatment approaches show promise, they also present numerous unanswered questions, reflecting the dynamic nature of this field. As the landscape of NSAID-ERD management continues to evolve, this review provides insights into the challenges faced by clinicians and underscores the need for further research to optimize patient care and quality of life outcomes.</div></div>","PeriodicalId":51323,"journal":{"name":"Journal of Allergy and Clinical Immunology-In Practice","volume":"12 11","pages":"Pages 2907-2913"},"PeriodicalIF":8.2,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141560340","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-01DOI: 10.1016/j.jaip.2024.08.028
Hannah F. Marshall MBChB , Helen A. Brough MBBS, PhD
{"title":"The Challenges of Oral Tolerance Induction in a Diverse Population Advised to Introduce Allergens Early: Insights From the EarlyNuts Study","authors":"Hannah F. Marshall MBChB , Helen A. Brough MBBS, PhD","doi":"10.1016/j.jaip.2024.08.028","DOIUrl":"10.1016/j.jaip.2024.08.028","url":null,"abstract":"","PeriodicalId":51323,"journal":{"name":"Journal of Allergy and Clinical Immunology-In Practice","volume":"12 11","pages":"Pages 3079-3080"},"PeriodicalIF":8.2,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142632242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-01DOI: 10.1016/j.jaip.2024.07.021
Gabriel Lavoie MD , Catherine Lemière MD, MSc
Background
Specific inhalation challenge (SIC) tests are still the reference test for diagnosing sensitizer-induced occupational asthma (SIOA). The European Respiratory Society recommends the cessation of inhaled corticosteroids (ICS) 72 hours before SIC.
Objective
To assess the effect of an ongoing ICS treatment during SIC on the maximum fall in forced expiratory volume in 1 second (FEV1), the change in methacholine provocative concentration of methacholine inducing a 20% fall in FEV1 (PC20), and sputum eosinophil counts after exposure to the suspected agent.
Methods
We performed a retrospective analysis using a database of cases referred to our center for suspected SIOA from 1999 to 2022. The results of the SIC were compared between subjects treated with ICS during SIC and steroid-naïve subjects.
Results
Six hundred and seventy-one individuals underwent SIC in the laboratory. Three hundred and eighteen were treated with ICS, whereas 353 were steroid naïve. The proportion of subjects with a positive SIC was greater among ICS-treated subjects (39. 6%) compared with steroid-naïve subjects (27.5%, P < .001). A treatment with ICS did not influence the outcome of the SIC. There was no difference in the change in PC20 or the percentage of sputum eosinophils after SIC between steroid-treated and steroid-naïve subjects.
Conclusions
An ongoing ICS treatment during an SIC did not affect the occurrence of an asthmatic reaction, the change in airway responsiveness, or eosinophilic inflammation after exposure to the suspected agent in subjects who have been treated with ICS for a long period of time.
背景:特异性吸入挑战试验(SIC)仍然是诊断致敏剂诱发的职业性哮喘(SIOA)的参考试验。欧洲呼吸学会建议在 SIC 前 72 小时停止吸入皮质类固醇(ICS):目的:评估 SIC 期间持续使用 ICS 对 FEV1 最大降幅、甲基胆碱 PC20 变化以及痰中嗜酸性粒细胞计数的影响:我们利用 1999 年至 2022 年期间因疑似 SIOA 转诊至本中心的病例数据库进行了回顾性分析。比较了在SIC期间接受ICS治疗的受试者和未接受类固醇治疗的受试者的SIC结果:结果:六百七十一人在实验室接受了SIC治疗。其中 318 人接受了 ICS 治疗,353 人未接受类固醇治疗。在接受过 ICS 治疗的受试者中,SIC 阳性的比例(39.6%)高于类固醇未接受过治疗的受试者(27.5%,P20 或类固醇治疗受试者和类固醇未接受治疗受试者 SIC 后痰中嗜酸性粒细胞的百分比):结论:对于长期接受 ICS 治疗的受试者来说,在 SIC 期间持续接受 ICS 治疗不会影响哮喘反应的发生、气道反应性的变化或接触可疑病原体后的嗜酸性粒细胞炎症。
{"title":"Impact of Ongoing Treatment With Inhaled Corticosteroids During Specific Inhalation Challenges for Diagnosing Occupational Asthma","authors":"Gabriel Lavoie MD , Catherine Lemière MD, MSc","doi":"10.1016/j.jaip.2024.07.021","DOIUrl":"10.1016/j.jaip.2024.07.021","url":null,"abstract":"<div><h3>Background</h3><div>Specific inhalation challenge (SIC) tests are still the reference test for diagnosing sensitizer-induced occupational asthma (SIOA). The European Respiratory Society recommends the cessation of inhaled corticosteroids (ICS) 72 hours before SIC.</div></div><div><h3>Objective</h3><div>To assess the effect of an ongoing ICS treatment during SIC on the maximum fall in forced expiratory volume in 1 second (FEV<sub>1</sub>), the change in methacholine provocative concentration of methacholine inducing a 20% fall in FEV<sub>1</sub> (PC<sub>20</sub>), and sputum eosinophil counts after exposure to the suspected agent.</div></div><div><h3>Methods</h3><div>We performed a retrospective analysis using a database of cases referred to our center for suspected SIOA from 1999 to 2022. The results of the SIC were compared between subjects treated with ICS during SIC and steroid-naïve subjects.</div></div><div><h3>Results</h3><div>Six hundred and seventy-one individuals underwent SIC in the laboratory. Three hundred and eighteen were treated with ICS, whereas 353 were steroid naïve. The proportion of subjects with a positive SIC was greater among ICS-treated subjects (39. 6%) compared with steroid-naïve subjects (27.5%, <em>P</em> < .001). A treatment with ICS did not influence the outcome of the SIC. There was no difference in the change in PC<sub>20</sub> or the percentage of sputum eosinophils after SIC between steroid-treated and steroid-naïve subjects.</div></div><div><h3>Conclusions</h3><div>An ongoing ICS treatment during an SIC did not affect the occurrence of an asthmatic reaction, the change in airway responsiveness, or eosinophilic inflammation after exposure to the suspected agent in subjects who have been treated with ICS for a long period of time.</div></div>","PeriodicalId":51323,"journal":{"name":"Journal of Allergy and Clinical Immunology-In Practice","volume":"12 11","pages":"Pages 2977-2982"},"PeriodicalIF":8.2,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141879750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-01DOI: 10.1016/j.jaip.2024.08.023
Michaela Lucas MD, DrMed , Britta S. von Ungern-Sternberg MD, DrMed, PhD , Annabelle Arnold DipHE , Michelle Trevenen PhD , Susan Herrmann PhD , Laure Braconnier PhD , Syed Ali MD , Catherine Jepp MD , David Sommerfield MD , Kevin Murray PhD , Kristina Rueter MD, DrMed, PhD
Background
There is a scarcity of prospective studies investigating the relative roles of skin prick and intradermal testing, serum specific IgE, and extended oral challenges in diagnosing children with reported β-lactam allergies.
Objective
To determine the sensitivity and specificity of skin testing and serum specific IgE in children with β-lactam allergies, with immediate and nonimmediate historic reactions.
Methods
Four hundred children with parent-reported β-lactam allergies were recruited into an open-label prospective study. Detailed allergy histories were collected. Those with medically observed and documented histories of anaphylaxis, requiring epinephrine, or severe cutaneous adverse reactions were excluded. In total, 380 children underwent all testing modalities and a direct provocation test. Each child was followed up for a minimum of 3 years.
Results
True allergy in children was uncommon; 8.3% reacted to the direct provocation challenge or the 5-day extended oral provocation challenge. Children reporting cephalosporin allergy or a reaction within 1 year were more likely to react to direct provocation testing. The sensitivity, specificity, and positive predictive value of skin testing were 12.5%, 98.8%, and 20.0% for direct challenge outcomes, 4.76%, 99.0%, and 25.0% for extended challenge outcomes, and 6.9%, 99.0%, and 40.0% for both challenges combined, respectively. Follow-up investigations revealed that 5.7% of children had a mild repeat reaction and 2.7% continued to avoid the culprit despite successful delabeling. The relabeling rate for children readmitted to hospital was 15%, with the relabeing being unfounded.
Conclusions
Genuine β-lactam allergies were rare, with over 90% of children effectively delabeled. Skin and serum specific IgE testing did not aid the diagnosis of β-lactam antibiotic allergy in children, regardless of medical history. Extended oral challenges proved valuable in confirming allergies and boosted parental confidence.
背景:很少有前瞻性研究调查皮肤点刺和皮内试验、血清特异性免疫球蛋白 E 和扩展口服挑战在诊断报告的β-内酰胺过敏儿童中的相对作用:目的:确定皮肤测试和血清特异性免疫球蛋白 E 在β-内酰胺过敏儿童中的敏感性和特异性:一项开放标签的前瞻性研究招募了四百名由家长报告的β-内酰胺过敏儿童。研究人员收集了详细的过敏史资料。经医学观察并记录有过敏性休克病史、需要肾上腺素或 SCAR 的儿童被排除在外。共有 380 名儿童接受了所有测试方式和直接激发试验。每个儿童都接受了至少三年的随访:结果:儿童真正的过敏并不常见,8%-3% 的儿童对直接激发试验或 5 天延长口服激发试验有反应。对头孢菌素过敏或一年内出现过过敏反应的儿童更有可能对直接激发试验产生反应。皮试的敏感性、特异性和阳性预测值分别为:直接激发试验结果的 12-5%、98-8% 和 20-0%;延长激发试验结果的 4-76%、99-0% 和 25-0%;两种激发试验结果的 6-9%、99-0% 和 40-0%。后续调查显示,5%-7% 的儿童有轻微的重复反应,2%-7% 的儿童在成功脱标后仍继续回避罪魁祸首。再次入院治疗的儿童中,再次标签率为 15%,且再次标签没有依据:结论:真正的β-内酰胺过敏很少见,90% 以上的儿童能有效解除标签。无论病史如何,皮肤和血清特异性免疫球蛋白 E 测试都不能帮助诊断儿童对β-内酰胺类抗生素过敏。事实证明,扩展口服挑战对确认过敏和增强家长的信心很有价值。
{"title":"Comparing Skin and Serum Testing to Direct Challenge Outcomes in Children With β-Lactam Allergies","authors":"Michaela Lucas MD, DrMed , Britta S. von Ungern-Sternberg MD, DrMed, PhD , Annabelle Arnold DipHE , Michelle Trevenen PhD , Susan Herrmann PhD , Laure Braconnier PhD , Syed Ali MD , Catherine Jepp MD , David Sommerfield MD , Kevin Murray PhD , Kristina Rueter MD, DrMed, PhD","doi":"10.1016/j.jaip.2024.08.023","DOIUrl":"10.1016/j.jaip.2024.08.023","url":null,"abstract":"<div><h3>Background</h3><div>There is a scarcity of prospective studies investigating the relative roles of skin prick and intradermal testing, serum specific IgE, and extended oral challenges in diagnosing children with reported β-lactam allergies.</div></div><div><h3>Objective</h3><div>To determine the sensitivity and specificity of skin testing and serum specific IgE in children with β-lactam allergies, with immediate and nonimmediate historic reactions.</div></div><div><h3>Methods</h3><div>Four hundred children with parent-reported β-lactam allergies were recruited into an open-label prospective study. Detailed allergy histories were collected. Those with medically observed and documented histories of anaphylaxis, requiring epinephrine, or severe cutaneous adverse reactions were excluded. In total, 380 children underwent all testing modalities and a direct provocation test. Each child was followed up for a minimum of 3 years.</div></div><div><h3>Results</h3><div>True allergy in children was uncommon; 8.3% reacted to the direct provocation challenge or the 5-day extended oral provocation challenge. Children reporting cephalosporin allergy or a reaction within 1 year were more likely to react to direct provocation testing. The sensitivity, specificity, and positive predictive value of skin testing were 12.5%, 98.8%, and 20.0% for direct challenge outcomes, 4.76%, 99.0%, and 25.0% for extended challenge outcomes, and 6.9%, 99.0%, and 40.0% for both challenges combined, respectively. Follow-up investigations revealed that 5.7% of children had a mild repeat reaction and 2.7% continued to avoid the culprit despite successful delabeling. The relabeling rate for children readmitted to hospital was 15%, with the relabeing being unfounded.</div></div><div><h3>Conclusions</h3><div>Genuine β-lactam allergies were rare, with over 90% of children effectively delabeled. Skin and serum specific IgE testing did not aid the diagnosis of β-lactam antibiotic allergy in children, regardless of medical history. Extended oral challenges proved valuable in confirming allergies and boosted parental confidence.</div></div>","PeriodicalId":51323,"journal":{"name":"Journal of Allergy and Clinical Immunology-In Practice","volume":"12 11","pages":"Pages 3034-3043.e20"},"PeriodicalIF":8.2,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142037657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}