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Clinical relevance of peripheral blood eosinophil count in allergic bronchopulmonary aspergillosis
Journal of Infection and Public Health. 2011; 4 (5-6): 235-243
en Inglés | IMEMR | ID: emr-113623
ABSTRACT
Currently, there is not a uniform consensus regarding the number of criteria or specific cut-off values for the variety of tests that are used to diagnose allergic bronchopulmonary aspergillosis [ABPA]. Traditionally, an eosinophil count >1000cells/microl is considered an important criterion in the diagnosis of ABPA. The goal of this study was to delineate the significance of the peripheral blood eosinophil count in the diagnosis of ABPA, and the relationship between eosinophil counts and lung function and immunological and radiological parameters. This study was a retrospective analysis of the data from ABPA patients who were managed in our chest clinic. Based on their eosinophil count, the patients were classified into the following three categories <500, 500-1000 and >1000cells/microl. The spirometric, immunological and radiological characteristics were also assessed. We studied 108 males and 101 females with a combined mean [ +/- SD] age of 34.1 +/- 12.5years. The median [IQR] eosinophil count at diagnosis was 850 [510-1541]cells/microl, and 60% of the patients had an eosinophil count of <1000cells/microl. We found no relationship between eosinophil count and lung function using spirometry and other immunological parameters. The median eosinophil count was higher in patients with an high resolution computed tomography [HRCT] chest finding of bronchiectasis [986 vs. 620, p<0.001] vs. those without and in patients with high-attenuation mucus [1200 vs. 800, p<0.001] compared to those without high-attenuation mucus. A peripheral blood eosinophil count has limited utility in the diagnosis of ABPA, and there is no relationship between eosinophil count and lung function or other immunological parameters. The higher eosinophil count that we observed in patients with central bronchiectasis or high-attenuation mucus suggests that eosinophils are primary mediators of inflammatory activity in ABPA
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Índice: IMEMR (Mediterraneo Oriental) Idioma: Inglés Revista: J. Infection Public Health Año: 2011

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Índice: IMEMR (Mediterraneo Oriental) Idioma: Inglés Revista: J. Infection Public Health Año: 2011