Journal of food allergy最新文献

Background: Food allergy (FA) is a common chronic condition among U.S. children. Children with FA and their families often report greater psychosocial burden, which is adversely impacted by the inability to participate in daily activities. Regularly attending school remains central to supporting the well-being of children with FAs and related academic success.

Objective: The objective was to estimate the frequency of FA-related school absences, determine predictors, and understand how report of such absences is associated with FA-related psychosocial burden.

Methods: A survey was administered to a nationally representative sample of U.S. households in 2015-2016, obtaining parent-proxy responses for 38,408 children. Prevalence estimates were based on responses from NORC's AmeriSpeak Panel (51% completion rate), which were augmented by nonprobability-based responses via calibration weighting to increase precision. Prevalence was estimated via weighted proportions. Multiple logistic regression models evaluated factors associated with FA-related missed school days.

Results: Thirty-seven percent of children with FA who attended school in the past 12 months reportedly had one or more FA-related absence, with 13% missing 1-2 days (95% confidence interval [CI], 11.41-15.49 days), 17% missing 3-7 days (95% CI, 6.82-10.91 days), and 4% missing 8-14 days (95% CI, 3.13-6.20 days). Hispanic children were more likely to report missed school days in the past 12 months compared with white, non-Hispanic children with FA (odds ratio [OR] 1.62 [95% CI, 1.16-2.26]). Children with multiple FAs (OR 1.35 [95% CI, 1.03-1.76]), history of epinephrine use (OR 2.22 [95% CI, 1.70-2.90]), and anaphylaxis (OR 1.64 [95% CI, 1.26-2.14]) in the past 12 months, and those with a current epinephrine prescription (OR 1.05 [95% CI, 0.075-1.47]) have greater odds of reported FA-related school absence. Report of one or more FA-related absences was also associated with greater FA-related psychosocial burden (OR 1.72 [95% CI, 1.46-2.01]).

Conclusion: Parent report of children missing school for reasons related to FA is remarkably common and associated with greater FA-related psychosocial burden.

Anaphylaxis is a systemic allergic reaction that may be severe and life-threatening. With more than a dozen anaphylaxis definitions proposed over the past several decades and several diagnostic criteria in circulation, there is a need for a multinational consensus definition to simplify management across specialties. Anaphylaxis diagnostic criteria are more alike than they are different, and approaches of the National Institute of Allergy and Infectious Disease, World Allergy Organization, and Brighton Collaborative help to add granularity and perspective to patient management. Anaphylaxis occurs across a spectrum of severity within populations, although, among individual patients, there is some evidence to suggest more consistency for an individual allergen. Still, severity is influenced by a number of factors that demonstrate variability: factors that relate to allergen triggers, patient characteristics, and treatments received. Severity of anaphylaxis impacts management, and recent guidelines provide approaches that consider individual factors to inform both strong and conditional recommendations. Conditional recommendations serve as navigational signals for shared decision-making when patient expertise is leveraged to inform individual preferences and values together with clinician expertise in anaphylaxis management to provide patient care bespoke to each patient. As novel approaches to both prevention and treatment of anaphylaxis emerge, an understanding of the significance of strong and conditional recommendations becomes critical to providing individualized and appropriate care for patients at risk for anaphylaxis.

Background: Food allergic (FA) conditions have been classified as immunoglobulin E (IgE) and non-IgE-mediated reactions that affect as many as 8% of young children and 2% of adults in Western countries, and their prevalence seems to be rising. Although the immunologic basis of IgE-mediated FA is well established, the mechanisms that govern non-IgE-mediated FA are not well understood and are marked by a paucity of comprehensive insights.

Objective: The purpose of the present report is to examine the current classification and epidemiology of non-IgE-mediated FA, the latest immunologic mechanisms that underlie the three most commonly cited non-IgE FA conditions, viz., eosinophilic esophagitis, food protein-induced enterocolitis, and food protein-induced allergic proctocolitis, and explore what allergist/immunologists in practice should be aware of with regard to the condition.

Methods: An extensive research was conducted in medical literature data bases by applying terms such as FA, non-IgE allergy, tolerance, unresponsiveness, cytokines, CD4⁺ T helper cell pathways, and key cytokine pathways involved in FA.

Results: Current evidence now supports the view that immune dysregulation and cytokine-induced inflammation are the fundamental bases for both IgE- and non-IgE-mediated FA. The existing non-IgE-related FA literature is mostly characterized by a relative dearth of mechanistic information in contrast to IgE-mediated FA, in which the immunologic underpinnings as a T helper type 2 directed entity are well established. Although the need for future methodologic research and adherence to rigorous scientific protocols is essential, it is also necessary to acknowledge past contributions that have given much to our understanding of the condition. In the present report, a novel signature cytokine-based classification of IgE-mediated and non-IgE-mediated allergy is proposed that may offer a novel template for future research in the field of non-IgE-mediated FA.

Conclusion: The present report provides an overview of the current classification and frequency of IgE- and non-IgE-mediated FAs, and offers insights and potential solutions to address lingering questions, particularly when concerning the latest immunologic mechanisms that underlie the pathogenesis of non-IgE-mediated FA. Although some progress has been made in recent years toward making diagnostic and treatment options available for these conditions, there still remain many lingering questions and concerns to be addressed, which can be fully understood by future research.

Background: Anaphylaxis is a serious allergic reaction that is effectively treated with epinephrine. Epinephrine autoinjectors are devices that contain fixed doses of medication that can be carried by patients at risk for anaphylaxis so that ready access to first line medication is available outside the medical setting.

Methods: This review will discuss recent studies evaluating patient characteristics to consider when prescribing epinephrine autoinjectors.

Results: Decisions regarding who should be prescribed epinephrine autoinjectors will depend on the type of allergy, as well as co-morbidities and other risk factors that can increase a patient's risk for poor outcomes.

Conclusion: Shared decision-making is essential when developing guidance regarding post-epinephrine management. Regular education during routine follow-up visits can reinforce knowledge and skills for managing food allergy reactions.