Inhalant Allergens In Patients Research Articles

Allergens analysis in patients with allergic rhinitis in Rikaze

Objective:To investigate the distribution of allergens in patients with allergic rhinitis（AR） in Rikaze. Method:A retrospective analysis was performed in patients with AR diagnosed by skin prick test （SPT） between June 2017 and June 2018 from Rikaze People's Hospital. Result:One hundred and thirty-one patients were diagnosed with AR using SPT. The most common inhalant allergens were pollen, including Artemisia sieversiana willd（64.8%）, Artemisia annua L. （64.1%） and Humulus Scandens（45.8%）, while soybean（17.6%）, mango（15.3%） and carp（12.2%） were the most common food allergens. Conclusion:The most common inhalant allergens in patients with AR is the pollen in Rikaze area.

Prevalence of Sensitization to Food and Inhalant Allergens in Patients with Atopic Dermatitis in Gorgan, North of Iran

Prevalence of Sensitization to Food and Inhalant Allergens in Patients with Atopic Dermatitis in Gorgan, North of Iran

Minimum battery of test inhalant allergens needed in screeningallergic rhinitis patients in Beijing

Objective:The aim was to assess the prevalence of sensitized inhalant allergens in patients with allergic rhinitis (AR), analyze the differences of aeroallergen sensitization rates (SRs) in different areas, and define the minimal number and the type of aeroallergens required to identify patients as sensitized. Method:Six thousand two hundred and eighty five patients suffering from AR symptoms in Beijing, Heilongjiang, Inner Mongolia, Hebei and Shandong areas underwent standardized skin prick test (SPT) with 20 common aeroallergens during the period from Jan 2011 to Jul 2013 when seeking medical help in Beijing Tongren Hospital. The differences of aeroallergen sensitization rates in different areas were compared. Chi square was used in statistical analysis. Conditional approach allowed to determine the aeroallergen selection. Result:Among the 6 285 self-reported AR patients investigated, 5 575 (88.7%) patients had at least one positive skin prick reaction. The most common aeroallergen in Beijing, Heilongjiang, Hebei and Shandongwere house dust mites (HDMs). SRs of HDMs in these four areas decreased with latitude increment, whereas SRs of mugwort, ragweed and dandelion in these four areas increased with latitude increment. The three most prevalent aeroallergens in Inner Mongolia were mugwort (59.86%), ragweed (47.62%) and dandelion (46.26%), respectively. Overall, 8 allergens allowed identification ≥95% of sensitized subjects in Beijing. Conclusion:Der f was the most prevalent allergen in patients with AR in Beijing, Heilongjiang, Hebei and Shandong Areas, whereas SR of mugwort was highest in Inner Mongolia. Sensitization pattern of aeroallergens varied with areas. Eight allergens allowed identification of the majority of sensitized subjects in screening panels for allergy in Beijing.

Serum specific IgE responses to inhalant allergens sensitization

Background: Serum specific immunoglobulin E (ssIgE) sensitization to common inhalant allergens has not been studied in Indonesia. This study aimed to evaluate specific IgE production of common inhalant allergens in patients with asthma and/or allergic rhinitis in Jakarta, Indonesia.Methods: This was a cross-sectional study in adult patients with respiratory allergy from September to December 2016 at Cipto Mangunkusumo Hospital, Jakarta. Patients were included if they showed at least one positive skin prick test (SPT) to environmental allergens. Serum specific IgE was assayed by using multiple allergosorbent methods. Inhalant allergens tested were dust mites, pollen, cockroach, animal dander, and mould. Serum IgE level more than 0.35 kU/L was considered positive.Results: One hundred subjects were enrolled (76% women). Dust mites made up 75% of sensitization, followed by cat/dog (31%), cockroach (27%), pollen (24%), and mould (6%). Almost all patients sensitized to cockroach, pollen, cat/dog epithelia and mould were also co-sensitized with dust mites. Twenty two percent of patients were negative to all tested allergens.Conclusion: IgE-sensitization to inhalant allergens varies widely in respiratory allergic patients. House dust and storage mites are the most common allergens. About one-fifth of the subjects did not show specific-IgE sensitization. Thus, this test should always be combined with SPT to diagnose allergy.

Possible effect of landscape design on IgE recognition profiles of two generations revealed with micro-arrayed allergens.

The aim of this study was to investigate possible effects of landscape design on the IgE sensitization profile toward inhalant allergens in patients with respiratory allergy from Uzbekistan where green areas have been changed during the last two decades by a State program. Sera from two different generations of Uzbek (n=58) and, for control purposes, from two generations of Austrian (n=58) patients were analyzed for IgE reactivity to 112 different micro‐arrayed allergen molecules by ImmunoCAP ISAC technology. Changes in molecular IgE sensitization profiles to pollen allergens in the young vs the middle‐aged Uzbek population were associated with replanting, whereas those in the Vienna populations reflected natural changes in plant growth. Our data indicate that anthropologic as well as natural changes in the biome may have effects on IgE sensitization profiles already from one to another generation.

A clinical study of inhalant allergens in patients with allergic rhinitis

<p class="abstract"><strong>Background:</strong> The basis of diagnosis of allergy requires a good history and examination, however, the diagnosis cannot be confirmed on the basis of symptoms alone, because both allergic and non-allergic conditions can present with similar symptoms. Hence, allergy testing in the form of specific IgE (sIgE) measurement is an important aid in demonstrating both the presence and severity of such an allergy. The present study was undertaken to find out the common environmental allergens prevailing in Raichur causing allergic rhinitis, using carbohydrate cross reactive determinants (CCD), an in vitro test with high degree of sensitivity.</p><p class="abstract"><strong>Methods:</strong> The present prospective study was conducted among 30 patients with allergic rhinitis. A detailed general andENT examination were done, X-ray ofPNS, CT scan ofPNS, diagnostic nasal endoscopy and nasal smear examination for eosinophils, absolute eosinophil count and serum IgE levels using Euroimmun system of in vitro assay of specific IgE antibodies. </p><p class="abstract"><strong>Results:</strong> Allergy to dust mite, D. faranie, corn, carnation flower, sunflower, sheep wool and straw dust were the most frequent allergens causing allergic symptoms among patients in Raichur area. Total serum IgE was elevated in all the patients, 60% were allergic to dust mite as found by anti CCD specific IgE.</p><p><strong>Conclusions:</strong> Antibodies to dust mite D. faranie, rye, T. mothy grass was the commonest finding. Identification of inhalant allergens is an important factor in prevention and treatment of allergic rhinitis. </p>

Association Between the Sensitization Rate for Inhalant Allergens in Patients with Respiratory Allergies and the Pollen Concentration in Ulsan, Korea

Background/Aims: Pollinosis is an increasing problem, with allergenic pollen causing rhinitis, asthma, and other allergic diseases. This study examined the patterns of sensitization to inhalant allergens in patients with respiratory allergies and analyzed the regional pollen concentrations in Ulsan, Korea. Methods: A skin prick test was performed with 21 common inhalant allergens, including 18 types of pollen, in 634 patients with respiratory allergies from January of 2008 through December of 2010. Airborne pollen was collected daily from three different stations in Ulsan using a Durham sampler. Daily records and identification of the pollen types were made (2009-2010). Results: The sensitization rates for inhalant allergens were as follows: Dermatophagoides pteronyssinus (38.2%), Dermatophagoides farinae (38.0%), birch (15.8%), alder (15.3%), hazel (14.2%), oak (13.5%), beech (10.8%), mugwort (9.6%), and hop Japanese (5.2%). Airborne pollen has two peak seasons: tree pollen from February to June, followed by weed pollen from August to October. Pine tree, oak, and alder were the most frequently found pollen types in spring, whereas hop Japanese and mugwort were the most frequently found pollen types in autumn. Conclusions: House dust mites are the most common offending allergen in Ulsan. The sensitization rates to some tree pollen types, including birch, alder, and hazel were higher than those of weed or grass pollen. Causative allergens are changing in response to climate change and air pollution. Continuous aerobiological monitoring is the cornerstone for observing changes in pollen and a prerequisite for the study of the effect of climate change on allergic diseases. (Korean J Med 2014;86:453-461)

Prevalence of sensitization to aeroallergens in 10 030 patients with allergic rhinitis

To investigate the main inhaled allergens in patients with allergic rhinitis. Forty-three standardization allergens were used to perform skin prick test in 54 813 patients with chronic rhinitis. According to different gender and age groups, 10 030 patients with allergic rhinitis were divided into eight groups. The distributions of different allergens in the eight groups were analyzed. (1) The most common four allergens in male patients with allergic rhinitis were Dermatophagoides farina (Der f), Dermatophagoides pteronyssinus (Der p), Mugwort and Blaterlia Germanica. Der f, Der p, Mugwort and Chenopodium album were the most common in female patients. (2) In all groups, patients with dual positive allergens were the most common, followed by triple positive allergens and single positive allergen. (3) In single positive allergen group, the top four allergen in male 3-17 year group were Der f, Der p, Alternaria tenuis and Mugwort. In other male groups, the most common positive allergen were Der f, Der p, Mugwort and Blaterlia Germanica. Meanwhile, the top four positive allergens in female 3-17 year group were Der f, Der p, Mugwort and Alternaria tenuis, in 18-39 year group were Der f, Der P, Mugwort and Dandelion, in 40-59 year group were Der f, Der p Mugwort and mixed tree 1, in ≥60 year group were Derf, Der P, mixed animal hair and Mugwort. (4) In dual positive allergens group, the most common allergen combination was Der f+Der p, followed by Alternaria tenuis in patient of 3-17 year group. (5) In triple positive allergens group, the most common allergen combination was Der f+Der p+Blaterlia Germanica, followed by Der f+Der p+mixed animal hair. Dust mites, flowers pollen, herbs, Alternaria tenuis and Blaterlia Germanica were the most common allergens in patients with allergic rhinitis. However, the frequencies of the allergens were different in different age groups.

Association of sensitization to food and inhalant allergens in patients of asthma and rhinitis

Of 1860 patients screened, 1097 (58.9 %) gave history of food allergy. Of the history positive patients 470 were skin prick tested . 29.3 % (138/470) exhibited positive reactions to one or more food(s). Rice elicited SPT positive reaction in maximum ( 6.2 %) cases followed by blackgram (5.9 %), lentil (5.5 %), citrus fruits (5.3 %), pea (3.8 %), maize (3.8%) and banana (3.6 %). Among food sensitised cases 35.5% ( 49/138 ) of patients also showed positive skin reaction to one or more pollen extracts. A majority of the food sensitized patients (52.1 %) were skin test positive to insect allergens while only 14.7 % showed positivity with fungal extracts. Positive skin reaction with food co-existed with positive SPT to insects extracts. Sensitisation to food allergen (potential food allergy) was significantly associated with asthma (P=0.0065) whereas inhalant allergens (pollen, fungal and insects) were strongly related to rhinitis (P<0.01). However sensitisation with pollens was less common in patients of asthma with rhinitis. Sensitisation to food allergens was significantly associated with asthma alone ( P=0.0001). But food sensitivity is significantly less common in cases of asthma associated with rhinitis (P<0.028). Correlations between sensitisation to aeroallergens and ten common foods were analyzed. Conclusions The results suggest that concommittant sensitisations to food with pollen and insect may enhance the risk of asthma and rhinitis or contribute towards exacerbation of symptoms. The synergistic action of these factors may influence the development and progression of atopic manifestation.

GA2LEN skin test study I: GA²LEN harmonization of skin prick testing: novel sensitization patterns for inhalant allergens in Europe

Skin prick testing is the standard for diagnosing IgE-mediated allergies. However, different allergen extracts and different testing procedures have been applied by European allergy centres. Thus, it has been difficult to compare results from different centres or studies across Europe. It was, therefore, crucial to standardize and harmonize procedures in allergy diagnosis and treatment within Europe. The Global Asthma and Allergy European Network (GA(2)LEN), with partners and collaborating centres across Europe, was in a unique position to take on this task. The current study is the first approach to implement a standardized procedure for skin prick testing in allergies against inhalant allergens with a standardized pan-European allergen panel. The study population consisted of patients who were referred to one of the 17 participating centres in 14 European countries (n = 3034, median age = 33 years). Skin prick testing and evaluation was performed with the same 18 allergens in a standardized procedure across all centres. The study clearly shows that many allergens previously regarded as untypical for some regions in Europe have been underestimated. This could partly be related to changes in mobility of patients, vegetation or climate in Europe. The results of this large pan-European study demonstrate for the first time sensitization patterns for different inhalant allergens in patients across Europe. The standardized skin prick test with the standardized allergen battery should be recommended for clinical use and research. Further EU-wide monitoring of sensitization patterns is urgently needed.

Comparison of serum-specific IgE (ImmunoCAP) and skin-prick test results for 53 inhalant allergens in patients with chronic rhinitis

Prior studies comparing skin testing to serum-specific IgE testing for inhalant allergy focused on older technologies or small numbers of allergens. The purpose of this study was to compare ImmunoCAP (CAP) testing to skin prick testing (ST) for 53 inhalant allergens. Subjects > or =18 years old with chronic rhinitis and who had at least 1 positive ST to a 53 inhalant allergen panel underwent testing to an analogous CAP panel. ST was performed with the Quintip device. Using ST as a clinical gold standard, the sensitivity, specificity, positive, and negative predictive values (PPV, NPV) were calculated for CAP for each allergen. Percent agreement between testing methods was also evaluated, and the results were analyzed in association with the subjects' total IgE levels. Two-hundred fifty patients (96 male, 154 female, mean 37.1 years) were enrolled. Mean number of positive ST and CAP results were similar. The ST was more often positive for 69.8% of allergens, and 64% of patients had more positive ST than CAP. Overall, the specificity and NPV (generally 80-90%) of CAP were higher than the sensitivity and PPV. The overall agreement between tests was 80.6%, with 11.7% ST+CAP- results and 7.7% CAP+ST- results. In patients with a total IgE level > or = 200 IU/L, the percentage of positive CAP results for 52/53 allergens was significantly higher with more CAP+ST- results. The performance characteristics of CAP compared to ST vary among 53 inhalant allergens. CAP should be considered complementary, not equivalent, to ST. Total IgE levels should be obtained with serum-specific IgE testing.

Diagnostic value of the intradermal tests on inhalant allergens in patients with allergic diseases

Objective To explore the diagnesticvalue of the inhalant allergens in patients with allergic disea-ses. Methods The intradermal tests(IT) of 20 types of the inhalant allergens which were supplied by Diagnosis Rea-gent Factory of Beijing Union Hospital were made on 1434 cases with allergic diseases. The samples were divided into two age groups:4～18 year-old(children group,n=318) and 19-80 year-old( adults group,n=1116). Distribution of the inhalant allergens of the two groups was investigated. Results A total of 1434 cases (male :702, female:732) were diagnosed with allergic diseases. There were 8 kinds of allergic diseases. The number of allergic rhinitis was the first place( 1130 cases,78.80% ). The first 9 positive allergens separately were: polyvalent pollen Ⅰ (51.05%),house dust(48.81% ) ,mixed inhalant allergens( 48.61% ), artemisia pollen( 46.86% ), dust mite( 45.19% ) , poly-valent insects(36.82% ) ,spring poLlen Ⅰ(33.99% ) ,ragweed pollen(31.24% ) ,spring pollen Ⅱ (30.68% ). There were 1289 cases(89.89% ) at ]east one type positively on allergens. The 19～40 aged patients were the most in dif-ferent age groups. The difference of positive detection rate of allergens was significant in different quarters ( P<0.01 ). Conclusion The youth and middle aged is easoer to suffer loom allergic diseases. Allergic rhinitis was the most common disease,and polyvalent pollen Ⅰ ,house dust,artemisia pollen,dust mite,ragweed pollen were the main allergens. Key words: Desensitization,immunologic; Skin tests

Quantitative measurement of IgE antibodies to purified allergens using streptavidin linked to a high-capacity solid phase

Commercially available assays for IgE antibody provide results in international units per milliliter for many allergen extracts, but this is not easily achieved with purified or novel allergens. To develop assays for IgE antibody suitable for purified or novel allergens by using a commercially available immunosorbent. Streptavidin coupled to a high-capacity immunosorbent (CAP) was used to bind biotinylated purified allergens from mite (Der p 1 and Der p 2), cat (Fel d 1), and dog (Can f 1). Assays for IgE antibody to these allergens were performed on sera from children (asthma and control) as well as adults with atopic dermatitis. The results were validated by serial dilution of sera with high and low levels of IgE antibody and were quantitated in international units per milliliter by using a standard curve. Values for IgE antibody to Der p 1, Der p 2, and Fel d 1 correlated with values obtained with the allergen extracts (r2 = 0.80, 0.84, and 0.95, respectively; P < .001 in each case). Furthermore, the values for IgE antibody in sera from children with high exposure to mite and cat allergens demonstrated 10-fold higher levels of IgE antibody to Der p 1 and Der p 2 than to Fel d 1 (P < .001). The streptavidin immunosorbent technique provides a new method for quantifying IgE antibody to purified proteins. The results provide evidence about the high quantities of IgE antibody to purified inhalant allergens in patients with atopic dermatitis. In addition, the results demonstrate major differences in IgE antibodies specific for mite and cat allergens among children with high exposure to both allergens.

Inhalant Allergens in Patients with Allergic Rhinitis in Riyadh

A group of allergen skin-test reagents were selected for study in Saudi patients from aerobiological and immunochemical identification of potential allergens in the atmosphere and from dust samples...