chronic urticaria is the most common skin diseases, characterized by chronic cutaneous lesions which severely debilitates patients in several aspects of their everyday life. vitamin d is known to exert several actions in the immune system and to influence function and differentiation of mast cells, central role players in the pathogenesis of chronic idiopathic urticaria. this study was performe...

background: chronic idiopathic urticaria is defined as urticaria, which lasts for more than 8 weeks and has no apparent etiology. the aim of this study was to examine the causal role of helicobacter pylori infection in chronic idiopathic urticaria.   methods: fifty-six patients with chronic idiopathic urticaria and a negative response to skin prick test for common aeroallergens were selected. t...

Background: Chronic idiopathic urticaria is defined as urticaria, which lasts for more than 8 weeks and has no apparent etiology. The aim of this study was to examine the causal role of Helicobacter pylori infection in chronic idiopathic urticaria. Methods: Fifty-six patients with chronic idiopathic urticaria and a negative response to skin prick test for common aeroallergens were selected. The...

chronic idiopathic urticaria is defined as recurrent hives occurring for at least 6 weeks. in  the  majority of  cases, there  is no  identifiable underlying etiology despite  extensive evaluation. a subset of these patients is classified as having autoimmune urticaria defined by the presence of a functional igg antibody to the α subunit of the high-affinity ige receptor (fceria) or to ige. the...

Background: The etiology of urticaria is recognized only in a minority of cases. Allergies to a wide variety of agents have been suspected, as well as hyper reactivity to food additives or drugs. Recently, autoimmune reaction to immunoglobulin E (IgE) and later to high-affinity IgE receptors on mast cells has been reported. The aim of this study was to show elevated serum IgE levels in the pati...

Objective: To determine the prevalence of H. pylori infection in patients with idiopathic chronic urticaria (ICU) and to see if eradication of the bacterium affects the course of the urticaria. Patients and Methods: One hundred patients with idiopathic chronic urticaria and 43 healthy subjects (matched for age and sex) underwent serological testing for H. pylori infection. All patients with idi...

Background. Chronic urticaria is defined as urticaria persisting daily for more than six weeks. A significant number of patients had autoimmune basis where autologous serum skin test is widely used for detection of chronic autoimmune urticaria. Objectives. To estimate the frequency of autoimmune urticarial in Iraqi patients utilizing the autologous serum skin test and to evaluate its results wi...

BACKGROUND An association between class I and II alleles of the major histocompatibility complex and idiopathic chronic urticaria has previously been observed in different populations, but there are still no studies on Brazilian populations in this regard. OBJECTIVE The involvement of the major histocompatibility complex classes I and II (loci A, B and DR) in Brazilian patients with idiopathi...