Parietaria pollen a new aeroallergen in the city of Valparaiso, Chile

Abstract

Artículo de publicación ISIParietaria pollen has never been considered as a significant cause of pollinosis in Chile; therefore, the sensitization to Parietaria study has never been included in the study of patients with clinical suspicion of pollinosis in this region. The objective of this study was to describe the clinical characteristics of pollinosis caused by Parietaria in the Valparaı´so region, related to air concentrations of this kind of pollen. A cross-sectional studywas performedin the city of Valparaı´so. It consisted of two stages: In the first, pollen grains were counted between 1999 and 2001. In the second, a sensitization profile on a patient population diagnosed with ARC (allergic rhinoconjunctivitis) was evaluated. Parietaria judaica (P. judiaca) presented pollination all year long, with aggravation in the spring and summer, and with values reaching 80 grains/m3 (weekly average). These findings determined the transience of the symptoms in this population, which is mainly perennial with seasonal aggravations. A total of 72 atopic subjects were obtained during the whole sample recollection period. P. judaica was the second most frequent cause of sensitization (60 %) after Dermatophagoides in the sample overall. Also, in monosensitized subjects, it was the first cause of pollen sensitization. P. judaica represents the second cause of allergy in Valparaı´so and the first cause of pollinosis. These findings suggest the importance of quantifying Parietaria in Valparaı´so and near cities, plus investigating the presence of sensitization and symptoms to allergies in a significant proportion of patients in this region

Principales aeroalérgenos en rinoconjuntivitis alérgica en la ciudad de Temuco, Chile

“…Tanto la sensibilización a epitelio de gato como a esporas de hongos no presentaron características particulares respecto a otras ciudades 24 .…”

Trends and threshold exceedances analysis of airborne pollen concentrations in Metropolitan Santiago Chile

“…In the case of the SChMA, because of its rapid growth and territorial expansion [ 35 ], it has been particularly important to characterize, update and systemize the available information on the types and corresponding concentrations of the pollen present in its urban environment. Recent studies conducted in the cities of Temuco [ 36 , 37 ], Talca [ 38 ] and Valparaíso [ 39 ] have also been notable because they have provided knowledge regarding the types of airborne pollen present in these cities and their corresponding concentrations.…”