Probiotics and Allergic Diseases

Inclusion Criteria: 1. Age between 1 year old and 18 years old, 2. AD cases fulfill the diagnostic criteria by Hannifin and Rajka. 3. Atopy as shown by at least one positive skin test (weal size ≧ 3mm) or one positive MAST (RAST) (IgE ≧ 0.7 kU/L) test to any common food or environmental allergens. Exclusion Criteria: 1. Systematic corticosteroid, immunosuppressive therapy, or antimycotics treatment during the 4 weeks, antihistamines, and singulair during the 7 days before enrollment 2. Probiotic preparations used within 2 weeks before entering the study 3. Use of antibiotics now or other oral medications that will interfere the results 4. If they had immune deficiency disease or other major medical problems 5. If they had participated in another clinical study during the past month. 6. Subjects are undergoing desensitization therapy within 3 months prior to the screening period. 7. Subjects have participated investigational drug trial within 4 weeks before entering this study. 8. Subjects are pregnant, lactating or planning to become pregnant. 9. Subjects with any other serious diseases considered by the investigator that could interfere with the performance of SCORAD score result. 10. Subjects who is lack of physical integrity of gastrointestinal tract, or malabsorption syndrome, or inability to take oral medication.