过敏性鼻炎患者血清食物特异性IgG检测结果分析

目的 探讨血清食物特异性IgG抗体检测在过敏性鼻炎中的临床意义.方法 采用酶联免疫吸附法检测1067例过敏性鼻炎患者血清14种食物特异性IgG抗体水平.结果 食物特异性IgG抗体阳性率为77.51％,其中单阳性的占32.53％,多重阳性的占67.47％;食物不耐受的程度,以轻度不耐受最为多见(61.62％),中度和重度不耐受分别占22.88％和15.51％,中、重度不耐受多见于鸡蛋、牛奶和小麦;检测阳性率从高到低依次为:鸡蛋(56.14％)、牛奶(28.40％)、小麦(20.43％)、西红柿(14.81％)、大米(13.12％)、大豆(11.90％)、鳕鱼(9.93％)、螃蟹(7.87％)、玉米(6.56％)、河虾(5.90％)、蘑菇(4.03％)、鸡肉(3.47％)、猪肉(2.44％)、牛肉(0.56％);阳性率较高的鸡蛋、牛奶、小麦、西红柿、大米在≤14岁患者组阳性率最高,随年龄增长而呈下降趋势.结论 过敏性鼻炎患者食物不耐受的发生率较高,血清食物特异性IgG检测可用于筛查不耐受食物.     

14种食物过敏原特异性IgG抗体与变态反应性皮肤病的关系分析

通过分析变态反应性皮肤病患者血清14种食物过敏原特异性IgG抗体（Ab）水平,探讨检测食物过敏原特异IgG Ab在变态反应性皮肤病诊断与预防中的意义。采用ELISA检测86例荨麻疹、54例异位性皮炎患者和30名健康人血清14种食物特异性IgG Ab水平。结果表明,荨麻疹和异位性皮炎患者中一种或一种以上食物特异性IgG Ab阳性患者112例,阳性率为80.0%,对照组阳性4例,阳性率13.3%,两组相比差异有统计学意义（P〈0.001）;荨麻疹和异位性皮炎患者IgG Ab阳性率排前两位是牛奶和鸡蛋;儿童组牛奶、鸡蛋阳性率和阳性级数均高于成人组,两组相比差异有统计学意义（P〈0.001）。变态反应性皮肤病患者血清中存在食物特异IgG Ab,提示变态反应性皮肤病与食物不耐受有关,并对变态反应性皮肤病的诊断以及预防食物过敏有重要意义。     

2057例14岁以下儿童血清食物特异性IgG检测结果分析

目的 探讨14项食物特异IgG检测对儿童食物不耐受的临床价值.方法 采用酶联免疫吸附法检测2057例门诊患儿血清中14种食物特异性IgG抗体水平.结果 1897例食物特异性IgG抗体阳性,阳性率为92.22％,其中仅一种抗体阳性的占17.84％,多种抗体阳性的占74.38％;14种食物特异性IgG检测阳性率从高到低依次为:鸡蛋(78.61％)、牛奶(64.85％)、小麦(36.66％)、西红柿(33.74％)、大豆(18.04％)、大米(16.14％)、鳕鱼(12.11％)、玉米(8.22％)、蟹(4.81％)、鸡肉(3.60％)、虾(2.14％)、牛肉(2.09％)、猪肉(1.94％)、蘑菇(1.60％).阳性率较高的鸡蛋、牛奶、小麦、西红柿、大豆、大米在l～2岁患儿阳性率最高,然后随年龄增长而呈下降趋势.结论 儿童食物不耐受的发生率较高.血清食物特异性IgG检测可用于筛选儿童不耐受食物.     

食物不耐受IgG抗体在肠易激综合征中的检测意义

探讨食物不耐受IgG抗体检测在肠易激综合征中的临床价值.采用ELISA法半定量检测57例肠易激综合征患者血清中14种食物不耐受IgG抗体.结果显示,57例肠易激综合征患者中有43例食物不耐受IgG抗体呈阳性反应,以鸡蛋、牛奶、蟹的致敏性最高;14种IgG抗体阳性率分别为:牛奶(40.4%)、小麦(3.5%)、牛肉(7....     

14种食物不耐受与人体泌尿结石的相关性研究

目的探讨健康体检人群中,14种食物不耐受的检测现状及其与人体泌尿结石的相关性。方法选取2011年1月至2012年12月某综合医院健康管理中心进行食物不耐受检测者490例,采用酶联免疫吸附法检测血清14种食物过敏原特异性IgG抗体,采用x2检验比较食物不耐受不同程度分级及每一种食物不耐受阳、阴性组人体泌尿结石的情况,应用非条件Logistic回归模型进行泌尿结石的多因素分析。结果按IgG抗体阳性率高低排序,前三位分别为鸡蛋（32．45％）、螃蟹（27．96％）、牛奶（12．65％）。存在食物不耐受的检测者中,轻、中、重度食物不耐受分别占67．15％、24．09％、8．76％,中、重度不耐受多见于鸡蛋、牛奶,其次为螃蟹和鳕鱼。在控制收缩压、年龄、体重、红细胞等混杂因素的影响后,食物不耐受是泌尿结石的保护因素（OR=0．965,95％CI：0．943～0．987）,且存在一定的剂量一反映关系,食物不耐受程度越重,结石阳性率越低（x2=7．191,P=0．007）;牛奶、鸡蛋两种食物不耐受阳性组的泌尿结石阳性率均显著低于不耐受阴性组（X2=5．370,P=0．020;x2=6．696,P=0．010）,其余12种食物不耐受阳性组与不耐受阴性组的泌尿结石阳性率差异均无统计学意义。结论食物不耐受情况较为普遍。食物不耐受并非加重人体泌尿结石的发病率,而是与泌尿结石呈负相关,这可能与人们因食物不耐受而限制食物的摄取有关联。     

食物不耐受特异性抗体检测在婴儿湿疹中的诊疗应用

目的：探讨食物不耐受特异性抗体检测在婴儿湿疹疾病诊疗中的作用,为诊断、预防和治疗婴儿湿疹提供更好的手段.方法：采用ELISA法检测228例婴儿湿疹患儿血清中的特异性IgG抗体,并根据病史、临床症状及血清特异性IgG检测结果剔除相应食物,观察随访患儿临床症状改善情况.结果：14种食物中对鸡蛋的特异性比例最高209例（91.7％）,其次为牛奶159例（69.7％）,小麦88例（38.6％）,大豆61例（26.8％）,鳕鱼38例（16.7％）,大米31例（13.6％）蟹25例（11.0％）,虾3例（1.3％）,蘑菇和西红柿各2例,分别占0.9％,牛肉、猪肉、玉米分别为1例,分别占0.4％.对特异性IgG阳性程度达＋＋及以上患儿采取忌食过敏食物治疗3～6个月,并予回访.症状明显改善182例（79.82％）,症状改善40例（17.54％）,无效6例（2.63％）.结论：检测血清食物特异性IgG,进而了解患儿食物不耐受情况,可为婴儿湿疹诊断、预防及调整饮食治疗提供更客观的依据.     

无锡地区皮肤病患儿血清食物特异性IgG 的检测结果分析

目的:调查无锡地区皮肤病患儿血清食物特异性IgG阳性率及其流行特征。方法:回顾性分析2017年1月至2018年5月无锡市儿童医院皮肤科就诊患儿食物特异性IgG检测结果。结果:共纳入891例患者,其中湿疹364例,荨麻疹161例,特应性皮炎167例和过敏性紫癜199例;血清食物特异性IgG检测阳性率为72.8%,其中以特应性皮炎最高为80.2%,其他依次为荨麻疹(76.4%)、湿疹(72.3%)和过敏性紫癜(64.8%);食物特异性IgG阳性以鸡蛋(55.0%)、牛奶(34.1%)和小麦(7.7%)最多见,其他依次为大米(1.9%)和大豆(1.5%),余下9种食物均未发现阳性者。结论:在皮肤科就诊患儿中,血清食物特异性IgG阳性率高,建议对皮肤疾病患者进行食物特异性IgG检测,查找引起血清IgG升高的食物,对临床治疗具有积极的作用。     

32例过敏疾病患者血清14种食物过敏原特异性IgG抗体的检测

为探讨过敏疾病患者血清中14种食物过敏原的特异性IgG抗体水平,采用酶联免疫吸附法(ELISA)检测病人组32例,正常组22名。结果显示,病人组血清食物过敏原特异性IgG抗体有不同程度增高,阳性率依次为:虾34.4%,花生21.9%,鸡蛋18.8%,蟹15.6%,小麦12.5%,鳕鱼9.4%,玉米6.3%,大豆6.3%,牛肉3.1%,蘑菇3.1%,西红柿3.1%,鸡肉、猪肉、大米均为0;正常组仅鸡蛋、猪肉特异性IgG抗体轻度增高,阳性率均为4.5%,其余阴性。结论:过敏疾病患者血清食物过敏原特异性IgG抗体升高,说明此类患者体内产生特异性IgG抗体。食物过敏患者血清特异性IgG抗体升高明显,提示对临床确诊与防治食物过敏有重要意义。     

过敏性哮喘患者食物不耐受检测及临床意义

目的 探讨食物不耐受特异性总IgG检测在过敏性哮喘患者中的临床意义.方法 以281例过敏性哮喘患者为患者组,100名健康体检者为对照组,采用酶联免疫吸附法检测血清中14种食物过敏原总IgG浓度并进行对比分析.结果 过敏性哮喘发病与食物不耐受血清特异性总IgG的阳性强度、种类具有一定的相关性,且在患者不同年龄阶段食物过敏原种类也有一定的差异.患者组和对照组两种食物不耐受特异性总IgG抗体阳性率分别为38.79％和1.00％,三种及三种以上食物不耐受特异性总IgG抗体阳性率分别为11.74％和0.00％.患者组与对照组食物中度不耐受的阳性率分别为38.08％和3.00％,食物重度不耐受的阳性率分别为21.35％和2.00％.结论 根据食物特异性总IgG的检测结果剔除相应食物,观察随访病人的临床症状改善情况,为临床医生对疾病的诊治和预防提供依据.     

1617例慢性过敏患者食物不耐受检测

探讨慢性过敏患者食物不耐受特异性抗体分布的临床特征及检测意义.用酶联免疫方法对北京地区1617例慢性过敏患者进行食物不耐受IgG抗体检测,并对其中100例检测阳性者进行IgE抗体检测,随后对检出食物特异性IgG阳性的539例患者进行饮食指导并随访3个月.1617例患者中1407例对1～6 种不等的食物特异性IgG升高,...     

Alterations of food antigen-specific serum immunoglobulins G and E antibodies in patients with irritable bowel syndrome and functional dyspepsia

BACKGROUND: Post-prandial worsening of symptoms as well as adverse reactions to one or more foods are common in the patients with functional gastrointestinal diseases, such as irritable bowel syndrome (IBS) and functional dyspepsia (FD). However, the role played by true food allergy in the pathogenesis of these diseases is still controversial and there are no well-established tests to identify food allergy in this condition. OBJECTIVE: To investigate serum food antigen-specific IgG, IgE antibody and total IgE antibody titres in controls and patients with IBS and FD, and to correlate symptoms with the food antigen-specific IgG titres in IBS and FD patients. METHODS: Thirty-seven IBS patients, 28 FD patients and 20 healthy controls participated in this study. Serum IgG and IgE antibody titres to 14 common foods including beef, chicken, codfish, corn, crab, eggs, mushroom, milk, pork, rice, shrimp, soybean, tomatoes and wheat were analysed by ELISA. Serum total IgE titres were also measured. Last, symptomatology was assessed in the study. Results IBS patients had significantly higher titres of IgG antibody to crab (P=0.000), egg (P=0.000), shrimp (P=0.000), soybean (P=0.017) and wheat (P=0.004) than controls. FD patients had significantly higher titres of IgG antibody to egg (P=0.000) and soybean (P=0.017) than controls. The percentage of individuals with detectable positive food antigen-specific IgE antibodies of the three groups did not show any significant differences (P=0.971). There were no significant differences between IBS patients, FD patients and controls in the serum total IgE antibody titres (P=0.978). Lastly, no significant correlation was seen between symptom severity and serum food antigen-specific IgG antibody titres both in IBS and FD patients. CONCLUSION: Serum IgG antibody titres to some common foods increased in IBS and FD patients compared to controls. But there is no significant correlation between symptom severity and elevated serum food antigen-specific IgG antibodies in these patients.     

Food-specific immunoglobulin E among children with atopic dermatitis: a retrospective study.

This retrospective study included 133 children aged between 2 and 16 years with elevated serum food-specific immunoglobulin E (IgE), including 59 children clinically diagnosed with atopic dermatitis (AD) and 74 children clinically diagnosed with atopic disease without AD (asthma, allergic rhinitis, or both). Six common serum food-specific IgEs were detected by the Pharmacia ImmunoCAP test, including: egg white, milk, peanut, soybean, shrimp and egg yolk. Serum total IgE was also measured. The results showed that both AD and non-AD atopic children had the highest sensitization rate to shrimp. AD children had significantly higher serum total IgE and average number of positive food sensitization items than atopic children without AD. Three serum food-specific IgEs, including peanut, soybean and egg yolk, were significantly higher in children with AD than in those without AD. Furthermore, 3 pairs of food-specific IgEs were correlated with each other in AD children: egg white IgE correlated with peanut IgE, egg white IgE correlated with egg yolk IgE, and peanut IgE correlated with soybean IgE. In logistic regression analysis of the serum of 6 food allergen-specific IgEs in AD children, we found that elevated peanut- and egg yolk-specific IgE were risk factors of AD in elevated serum food-specific IgE children whose serum total IgE was less than 1000 kU/L but not in those with total IgE greater than 1000 kU/L.     

233例慢性荨麻疹患者过敏原分布及其临床意义分析

目的 研究分析233例慢性荨麻疹患者过敏原分布及其临床意义.方法 选取2015年7月至2016年9月在我院就诊的慢性荨麻疹患儿233例,根据过敏原分为吸入组和食入组,采用免疫印迹法对患儿血清进行特异性IgE定性检测,观察分析两组患儿过敏原结果和对单一或合并多种过敏原的结果.结果 233例慢性荨麻疹患儿中有140例血清IgE检测为阳性,占比为60.01%,其中吸入组阳性例数为115例,占比为(49.35%),食入组阳性例数为60例,占比为25.76%,总共有35例为两组共同阳性,吸入组过敏原阳性率高于食入组,两组差异具有统计学意义(P<0.05);吸入组过敏原中尘螨组合的占比最高(15.02%),艾蒿和律草的占比最低(0.85%);食入组过敏原中蟹和虾的占比最高(4.72%),鸡蛋白和黄豆的占比最低(1.29%);140例阳性患儿中,对1种过敏原呈阳性的患儿55例,对2种过敏呈阳性的患儿34例,对3种及以上的过敏原呈阳性的患儿51例,单种过敏原阳性患儿例数明显多于多种过敏原阳性患儿例数.结论 对慢性荨麻疹患儿进行过敏原检测,为治疗和预防提供有效依据,具有重要的临床意义.     

Food sensitization in infants and young children with atopic dermatitis

Atopic dermatitis (AD) is a chronic, relapsing, inflammatory skin disease. Children with AD tend to have a higher prevalence of food allergies. This study investigated the clinical significance of food sensitization in AD patients. A total of 266 AD patients participated in this study. The prevalence of food sensitization and clinically relevant sensitization were compared in the subjects according to their age and AD severity. Sera from all patients were analyzed for food-specific IgE levels using the Pharmacia CAP System FEIA. The serum specific IgE levels for egg, milk, peanut and soybean were measured. Patients were regarded as sensitized to the food if their food-specific IgE levels were above 0.35 kUA/L. Also the food-specific IgE levels, the so-called diagnostic decision point, which is recommended as the clinically relevant level, for clinical food allergy, as suggested by Sampson et al, was used as an alternative method. From the measurement of food-specific IgE antibodies of the four foods, egg was the most highly sensitized and the main causative allergenic food in children with AD. The positive rates of specific IgE to the four major food allergens, and the prevalences of clinically relevant food sensitization, were higher for all foods tested in the group less than 1 year of age, and were significantly higher in moderate to severe AD compared to mild AD in infants and young children. In summary, presence of food specific IgE is prevalent in infants and young children with AD, and clinically relevant food sensitization is important in Korean infants and children with moderate to severe AD.     

Utility of food-specific IgE concentrations in predicting symptomatic food allergy

BACKGROUND: The double-blind, placebo-controlled food challenge is considered the gold standard for diagnosing food allergy. However, in a retrospective analysis of children and adolescents with atopic dermatitis and food allergy, discrete food-specific IgE concentrations were established that could predict clinical reactivity to egg, milk, peanut, and fish with greater than 95% certainty. OBJECTIVE: The purpose of this investigation was to determine the utility of these 95% predictive decision points in a prospective evaluation of food allergy. METHODS: Sera from 100 consecutive children and adolescents referred for evaluation of food allergy were analyzed for specific IgE antibodies to egg, milk, peanut, soy, wheat, and fish by using the Pharmacia CAP System FEIA. Food-specific IgE values were compared with history and the results of skin prick tests and food challenges to determine the efficacy of previously established 95% predictive decision points in identifying patients with increased probability of reacting during a specific food challenge. RESULTS: One hundred children (62% male; median age, 3.8 years; range, 0.4-14.3 years) were evaluated for food allergy. The diagnosis of food allergy was established by means of history or oral food challenge. On the basis of the previously established 95% predictive decision points for egg, milk, peanut, and fish allergy, greater than 95% of food allergies diagnosed in this prospective study were correctly identified by quantifying serum food-specific IgE concentrations. CONCLUSION: In a prospective study of children and adolescents referred for evaluation of food allergy, previously established 95% predictive decision points of food-specific IgE antibody concentrations for 4 major food allergens were effective in predicting clinical reactivity. Quantification of food-specific IgE is a useful test for diagnosing symptomatic allergy to egg, milk, peanut, and fish in the pediatric population and could eliminate the need to perform double-blind, placebo-controlled food challenges in a significant number of children.     

Food induced urticaria in children

We conducted a prospective study at King Chulalongkorn Memorial Hospital, from June 2001 to November 2003, to identify the contribution of food allergy to urticaria in children. During the study period, 100 children with urticaria were enrolled, 36 of whom had a history suspicious of food allergy. Fifteen of 100 patients had fever (9 from upper respiratory tract infections, 4 from diarrhea and 2 from skin infections). A skin prick test (SPT) was positive in 15 of the 36 children who were suspected of having food allergy; 5 patients out of the positive SPT group had anaphylaxis due to food (2 from cow milk, 2 from wheat and 1 from egg). Six patients in the positive SPT group had a negative food challenge test (4 from open challenges and 2 from double-blind placebo-controlled food challenges [DBPCFC]). The other 4 patients of the positive SPT group refused the food challenge test. The parents of a patient who had urticaria from egg refused the skin prick test; an oral challenge test confirmed the diagnosis of egg allergy. One of the 21 patients that had a negative SPT had shrimp allergy proven by DBPCFC. Of the 64 patients who had no history related to food, SPT was done in 27 patients and revealed a positive result in 7 patients, all of whom had a negative food challenge test (4 with open challenge and 3 with DBPCFC). Urticaria from food was found in 7% and was suspected in another 4% of the patients. Severe reactions to food like anaphylaxis may occur. SPT alone is not adequate in making the diagnosis of food allergy; it must be confirmed by a food challenge test. Thirty percent of patients that did not have a history related to food had false positive SPT. Without a history suspicious of food allergy, SPT yields only minimal benefit.