Betalactams are the most frequent cause of hypersensitivity reactions to drugs mediated by a specific immune mechanism. Immediate occur within 1 6 hours after betalactam administration, and generally IgE-mediated. They clinically translate into urticaria, angioedema anaphylaxis. Non-immediate or delayed hour administration. These common usually T cells. The type is maculopapular morbilliform ex...

Omalizumab is a widely used therapeutic anti-IgE antibody. Here we report the crystal structure of the omalizumab-Fab in complex with an IgE-Fc fragment. This structure reveals the mechanism of omalizumab-mediated inhibition of IgE interactions with both high- and low-affinity IgE receptors, and explains why omalizumab selectively binds free IgE. The structure of the complex also provides mecha...

BACKGROUND No longitudinal studies exist on the natural history of food hypersensitivity and IgE sensitisation to food allergens in adults. OBJECTIVE To examine the natural history of food hypersensitivity, the natural history of IgE sensitisation to food allergens and to investigate the risk factors for new onset food hypersensitivity. METHODS Food hypersensitivity was questionnaire-assess...

Introduction: Otitis media with effusion (OME) is prevalent among children in such a way that it is the most common cause of hearing loss and surgery in childhood. Immunoglobulin E (IgE) mediated hypersensitivity has been proposed as a causative factor in the development of OME; however, there has been contrasting data in this regard. Therefore, the present study aimed to detect the possi...

Quinolone hypersensitivity, most of which is immediate type, is rare but has increased in recent years. The pathogenic mechanisms underlying immediate reactions are not defined clearly. This study was aimed to observe the clinical characteristics of immediate hypersensitivity to ofloxacin and to investigate the pathogenic mechanism with detection of serum specific IgE to ofloxacin using an enzy...

Drug hypersensitivity reactions (HSRs) are increasing in the 21st Century with the ever expanding availability of new therapeutic agents. Patients with cancer, chronic inflammatory diseases, cystic fibrosis, or diabetes can become allergic to their first line therapy after repeated exposures or through cross reactivity with environmental allergens. Avoidance of the offending allergenic drug may...

Background Cetuximab, a chimeric mouse-human IgG1 monoclonal antibody against the epidermal growth factor receptor, is approved for use in colorectal cancer and squamous-cell carcinoma of the head and neck. A high prevalence of hypersensitivity reactions to cetuximab has been reported in some areas of the United States. IgE antibodies against cetuximab were present in the patients with cetuxima...

INTRODUCTION Celiac disease and immediate type hypersensitivity to wheat are immune responses with different pathogenic mechanisms. Both diseases are well known entities but their coexistence in the same patient is rarely reported. This is a unique case presentation of a patient with celiac disease who developed concomitant IgE-mediated wheat allergy and presented with immediate symptoms in two...

OBJECTIVES The goals were to evaluate the usefulness of skin tests, patch tests, serum specific IgE assays, and challenges in diagnosing hypersensitivity reactions to cephalosporins and to clarify the pathogenic mechanism of such reactions. METHODS Children with immediate manifestations (within 1 hour) underwent immediate-reading skin tests with penicillin reagents and any suspect cephalospor...

Foods that account for 90% of allergic reactions in children are cow's milk protein, eggs, peanut, soy, tree nuts, fish, and wheat. Food allergy can manifest as urticaria/angioedema, anaphylaxis, atopic dermatitis, respiratory symptoms, or a gastrointestinal (GI) disorder. GI allergic manifestations can be classified as immunoglobulin E (IgE) mediated (immediate GI hypersensitivity and oral all...