View clinical trials related to Nut Hypersensitivity.
Filter by:Peanut allergy is the most common cause of fatal and near-fatal food-allergic reactions and egg allergy is among the two most common causes of food-induced anaphylaxis. The proposed research will explore the development of sensitization to these food(s) in infants based on maternal consumption or avoidance during pregnancy and breastfeeding.
Thresholds In food allergy evaluaTion And predictioN, a prospective, observational registry. The aim is to quantify food allergy thresholds in Canada and their clinical predictors.
The objectives of the CAJESITO study are (i) to assess the tolerance of oral cashew nut immunotherapy, by describing the frequency and severity of allergic reactions during oral cashew nut immunotherapy and (ii )to assess the risk factors for severe allergic reactions during oral cashew nut immunotherapy (predictive factors, associated factors.
Food allergy is an immune reaction, triggered by food protein allergens, of varying severity, from mild local reaction to life threatening anaphylaxis and fatalities. Peanut is a plant from the botanical family of the Fabaceae, more commonly known as legumes. The prevalence of peanut and tree nut allergy is increasing. In France (ELFE cohort), it is estimated to 0.93%. The tree nuts include mainly almond, hazelnut, pistachio, cashew nut, walnut, pecan nut and Brazil nut. Allergy's prevalence is estimated to 0.54% in children up to 5.5 years. Peanut allergy is a main cause of anaphylaxis and deaths due to food allergy. Recurrence of food allergy is a main concern. The risk has been estimated to 10% per year for peanut. In France, Data in real-life on the rate of recurrence of allergic reactions and anaphylaxis to peanut/tree-nut as well as risk factors, are lacking. The objective of this study is to assess the frequency of allergic reaction to peanut and tree-nuts, to describe the reactions' characteristics and risk factors.
Peanut and nut allergy can be life threatening. Some patients have very low threshold levels (i.e. the amounts of peanut and nuts to which the patients react), others react to higher doses. The reasons for these differences in threshold are not well understood. Patients with peanut and nut allergy often suffer from other allergic diseases (atopic dermatitis, hay fever and asthma). A disturbed gut microbiota composition and an increased gut permeability may explain the development of allergic disease. We hypothesize that increased gut permeability is related to low threshold levels to peanuts or nuts. In addition, as it is known that nutrition can influence our gut permeability, we also hypothesize that a healthful immune-supportive diet restores gut permeability and alleviates symptoms. Therefore, the purpose of the study is to study in peanut and nut allergic children: 1. the relationship between gut permeability and threshold levels to peanut or nuts; 2. the effect of an immune-supportive diet on gut permeability, gut microbiome composition, coexisting allergic symptoms and quality of life
The aim of the study is to assess the prevalence of peanut, tree nuts, and sesame allergy in Polish children at high risk of food allergy. Additionally, the timing of the development of peanut, tree nuts and sesame allergy in the first three years of life in a high-risk population will be assessed.
Tree nut immunotherapy Route Assessment and DEvelopment (TRADE) is a randomized controlled trial that evaluates the efficacy and safety of sublingual immunotherapy and lower, more tolerable, doses of oral immunotherapy than currently in use.
The number of young children with food allergy, in particular with nut allergy, is increasing worldwide. A diagnosis of nut allergy can cause much anxiety in parents. They worry about their child being exposed to nuts in foods when outside the home. This anxiety can lead to these young children being restricted from taking part in normal childhood activities. Last year, the investigators conducted a study Recording accidental allergic reactions in children's and teenagers (ReAACT) in which they surveyed over 500 children with food allergy attending our clinic, in order to learn more about their participation in social activities and their practices in relation to eating outside the home. In the present study, the investigators wish to build upon these results through using the findings to develop a programme to help to lessen the fear and anxiety experienced by parents of young children with newly diagnosed nut allergy. The investigators imagine that knowledge of how other families with children who have food allergy participate in activities involving food outside of the home might help newly diagnosed families. The investigators would like to know if parents of young children newly diagnosed with nut allergy would benefit from hearing this information. In order to do this, the investigators have developed a short online programme that parents can take part in, in their own homes. Content will focus on the day to day social activities of children with food allergy, based on the findings of the REAACT study. To help the investigators to measure the effectiveness of this programme on reducing anxiety and improving quality of life, they are asking all volunteer participants to complete 4 questionnaires. Two of these questionnaires will ask a parent to indicate 1) the impact of their child's nut allergy on their quality of life and 2) on their child's quality of life. The third questionnaire will ask about their level of anxiety. The fourth questionnaire will ask about their emotions and the coping strategies they use in the context of their child's food allergy. Participants will be randomized into 2 groups. Group 1 will take part in the online education session along with the usual education provided by the allergy team. The questionnaires will be completed online using only a study identifier number. This will ensure anonymity throughout the study. The only personal information that will be asked is parent's age group, whether they are a mother or father, their child's age and gender and whether they have any other allergies. Two weeks following the online educational session, Groups 1 and 2 will again complete the online questionnaires. The research question is to determine if the online educational session is effective at decreasing anxiety and improving quality of life in parents of young children with nut allergy. The outcomes are health related quality of life and level of anxiety. It is hoped that the findings will positively support parents, children and their families in Ireland who are living and managing nut allergy on a daily basis.
The BAT Impact study is a prospective multicentre study in the UK using a biomarker-led study design to compare the incidence of adverse events (defined as allergic reactions during oral food challenges) in a randomized-controlled trial. Patients will either follow the standard-of-care (i.e. an oral food challenge in case of equivocal SPT/sIgE) or follow a basophil activation test (BAT)/mast cell activation test (MAT)-based strategy, i.e. patients with a positive BAT or MAT are dispensed of an oral food challenge (OFC) and patients with a negative BAT/MAT undergo an OFC.
IgE-mediated food allergy can manifest with reactions ranging from hives to anaphylactic shock. The diagnosis is based on the confirmation of sensitization to the food allergen by skin tests (prick) and the determination of specific IgE directed against the food source and molecular allergens. The gold standard remains the oral provocation test, which is performed in a hospital environment. Once the diagnosis is made, an elimination diet is still considered as the cornerstone of treatment for most food allergies. While some allergies, such as cow's milk or egg, tend to resolve spontaneously, others, such as allergy to pecan nuts, show a tendency to be persistent. In addition, pecan allergy is often characterized by potentially serious clinical reactions, compared to other foods, which can even be life threatening. In our clinical practice, the investigators found that patients with allergies to pecan nuts often present with severe hypersensitivity reactions when challenged orally to this food. Beyond this information, there are few studies regarding pecans. The investigators decided to retrospectively evaluate the results of oral food challenge and of the allergy work-up in our patients sensitized and allergic to pecan nuts, to better understand the current epidemiology of such food allergy.