Analysis of allergen skin test results in 549 cases of children with asthma

Objective To analyze the common allergens and investigate the application of skin prick test in the pathogen of asthma.Methods The allergic liquid for test was provided the ermatophagoides farina laboratory by Fudan University School of Medicine.The negative control liquid was sodium chloride injection(0.9%) and the positive control liquid was histamine hydrochloride.549 patients were given the skin prick test in the flexor aspect of forearm.Results(1) 438 children's outcome were positive,the positive rate was 79.8%.The positive rate increased with age.(2) Dermatophagoides farina、animal skin and cotton fiber were most important allergens in our study and the positive rate was 60.8%,21.5% and 18.21%,respectively.(3) The positive ratio of the allergen and the frequency of asthmatic attack were positively correlated.The positive ratio of the allergen had no difference with the patient′s sex.Conclusion Dermatophagoides farina,animal skin and cotton fibre are the most common allergens in the children with asthma in our area.The allergen skin prick test is suitable for the children of 3 years old or above who suffered from asthma which has occurred repeatedly.