ABSTRACT
Objective To investigate the association between the results of Dermatophagoides pteronyssinus ( Der p) and Dermatophagoides farinae ( Der f) allergen SPT and serum sIgE in diagnosis of IgE-mediated mite allergy.Methods A total of 166 allergic outpatients with positive expression of serum sIgE of Der p and Der f diagnosed in Beijing Tongren Hospital,the General Hospital of Shenyang Military Region and Guangzhou Institute of Respiratory Disease were enrolled in the study.The SPT was performed by injecting liquid containing the allergen of Der p and Der f.One hundred ninety healthy subjects with negative serum sIgE of Der p and Der f were assigned as controls according to paired design ratio,1 to 1.The sensitivity and specificity of SPT used Der p and Der f allergen were evaluated in the diagnosis of mite allergy.The association between the results of SPT and serum sIgE was analyzed by linear regression method.Results In the allergic group,the positive rates of SPT for Der p and Der f were 98.80％ ( 164/166) and 95.18％ (158/166) respectively.In the control group,the positive rate of STP for Der p and Der f were 2.11％ (4/190) and 1.58％ (3/190) respectively.The SPT results of Der p and Der f showed significant statistical difference between healthy subjects and allergic patients (x2 =285.5,386.3;P＜0.01 ).The sensitivity and specificity of the SPT were 98.80％ (164/166) and 97.89％ (186/190) for Der p and 95.18％ (158/166) and 98.42％ (187/190) for Der f,respectively.There was a significant association between SPT and sIgE with linear correlation analysis( r =0.737,0.708;P ＜ 0.O1 ).Conclusions Both SPT of Der p and Der f is highly sensitive and specific.At the same time,SPT has a significant positive correlation with sIgE.It can be used as an accurate,convenient and fast test in diagnosis of mite allergic diseases.
ABSTRACT
Introduction: Allergic rhinitis is common in otorhinolaryngology practice. According to ‘Allergy Rhinitis and its Impact on Asthma (ARIA), Clinical and Experimental Allergy Reviews’ guidelines, the management of allergic rhinitis includes allergen avoidance. Therefore, it is important to know the allergens to which the patient is sensitised. This study was carried out to determine the prevalence of sensitisation to common allergens among children with allergic rhinitis seen in a tertiary referral centre in Malaysia. Materials and Methods: All children aged five to 12 years who had been referred to Otorhinolaryngology clinic Universiti Kebangsaan Malaysia Medical Center (UKMMC) from 2005 to 2010 with symptoms consistent with allergic rhinitis and had a skin prick test (SPT) were included in the study. The common allergens that had been used in the SPT were aeroallergens, food allergens and contact allergens. The database of SPT results was collected and reviewed. Results: A total number of 580 children were included in this study with 69.3% showing positive SPT. From the positive SPT results, a total of 1,515 sensitisations were observed with 60.9% sensitised to aeroallergens, 38.6% sensitised to food allergens and 0.6% sensitised to contact allergens. Among the aeroallergens, the house dust mite accounted for more than half of the sensitisations: Dermatophagoides pteronyssinus (27.9%), Dermatophagoides farinae (26.4%), Blomia tropicalis (26.0%). The most common food allergen sensitisation was seafood – crab (18.5%), prawn (18.0%) and squid (8.7%). Each of the other food allergens tested accounted for less than five percent of the positive SPT result. The contact allergen tested in this study was latex. Conclusion: This data represents a common allergen sensitisation in children with rhinitis symptoms residing in urban areas with house dust mites being the most common allergen sensitised in these children.