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  • Title: A 12-year longitudinal study of Aspergillus sensitivity in patients with cystic fibrosis.
    Author: Hutcheson PS, Knutsen AP, Rejent AJ, Slavin RG.
    Journal: Chest; 1996 Aug; 110(2):363-6. PubMed ID: 8697834.
    Abstract:
    STUDY OBJECTIVE: The object of the study was to longitudinally follow immune parameters of Aspergillus fumigatus sensitization so as to predict those at risk for developing allergic bronchopulmonary aspergillosis (ABPA). DESIGN: Patients were evaluated for 5 immune parameters (skin test [ST], positive precipitating antibody [PPN], total IgE, IgE anti-A fumigatus antibody [IgE-Af], and IgG anti-A fumigatus antibody [IgG-Af]) at yearly intervals over a 12-year time period. SETTING: Patients were enrolled and evaluated during routine visits to the cystic fibrosis (CF) clinic at Cardinal Glennon Children's Hospital, St. Louis. PATIENTS: One hundred eighteen patients with documented CF participated. INTERVENTIONS: None. MEASUREMENTS AND RESULTS: Six patients were diagnosed as having ABPA. In the non-ABPA patient group, 42% had a positive ST, 42% were PPN positive, 54% had IgE-Af, 61% had IgG-Af, and 10% had an IgE greater than 1,000 IU/mL at some point in time. However, on follow-up, 18% lost skin reactivity, 54% lost-PPN, 53% lost IgE-Af, 45% lost IgG-Af, and IgE greater than 1,000 IU/mL declined more than 72% in 64% of patients. These losses were spontaneous, without systemic corticosteroid intervention. CONCLUSIONS: Spontaneous diminution and loss of immune parameters in non-ABPA CF patients prevented us from defining a profile of sensitivity likely to result in ABPA. This variability highlights the importance of obtaining follow-up studies and including clinical symptoms when considering the diagnosis of ABPA in patients with CF.
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