Airborne pollen is a major contributor to allergic respiratory diseases. However, the literature on patterns and seasonality of specific pollen types mainly comes from northern hemisphere and developed regions, limiting our ability to extrapolate these findings to other geographical locations. With this research letter, our aim is to contribute to the current knowledge of aerobiology by analyzing the decade-long patterns of airborne tree pollen in the city of Bahia Blanca, Argentina. In general, we found late winter to early spring as the period with the highest pollen counts. In 2020, the average pollen count during July through September was 78.81 (SD 79.70), the highest recorded during the last 10 years. These months had varying pollen concentrations from moderate (15-89 grains/m of air) to high (90-1499 grains/m of air). Regardless of such variation, August had consistently been the month with the highest peak concentrations from 2010 to 2020 (61.2, SD 57.3), followed by September (27.1, SD 20.3). We did not find any month with very high (˃1500 grains/m of air) peak concentration. Further studies need to be done to expand our knowledge on aerobiology to characterize specific pollen sub-types and determine the exact allergenic potential of airborne pollen in different regions.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.15586/aei.v50i2.487 | DOI Listing |
Environ Res
December 2024
Environmental Health Science & Research Bureau, Health Canada, Canada. Electronic address:
Airborne algae have been associated with respiratory illness in the setting of coastal harmful algae blooms but little is known about their effects in urban populations distributed across a country, and whether ambient air pollution is an effect modifier. Using cross-sectional data from 11,256 participants of the Canadian Health Measures Survey (CHMS), we tested the association between lung function expressed as a forced expiratory volume (FEV) and airborne concentrations of algae measured by a rotation impact sampler in the participant's city of residence on the day of spirometric testing. The daily upper 95th percentiles of algae ranged from 12.
View Article and Find Full Text PDFHeliyon
October 2024
Department of Environmental Science, Aarhus University, Roskilde, Denmark.
Bioaerosols, such as pollen and fungal spores, are routinely monitored for agricultural, medical or urban greening practices, but sampling methodology is largely relying on techniques more than half a century old. Moreover, biomonitoring campaigns often take place in urban environments, although sources can be located outside cities' borders with ampler vegetation. Therefore, the question arises whether we are accurately picturing the biodiversity and abundance of regional bioaerosols and whether those locally detected might derive from long-distance transport, horizontally or vertically.
View Article and Find Full Text PDFEnviron Res
December 2024
Swiss Tropical and Public Health Institute, Allschwil, Switzerland; University of Basel, Basel, Switzerland. Electronic address:
Background: Statistical and machine learning models are commonly used to estimate spatial and temporal variability in exposure to environmental stressors, supporting epidemiological studies. We aimed to compare the performances, strengths and limitations of six different algorithms in the retrospective spatiotemporal modeling of daily birch and grass pollen concentrations at a spatial resolution of 1 km across Switzerland.
Methods: Daily birch and grass pollen concentrations were available from 14 measurement sites in Switzerland for 2000-2019.
Sci Total Environ
June 2024
Department of Civil Engineering, Malaviya National Institute Technology, Jaipur 302017, Rajasthan, India.
Pollen, a significant natural bioaerosol and allergen for sensitized individuals, is expected to increase in prevalence due to climate change. Mitigating allergy symptoms involves avoiding pollen exposure and pre-medication, emphasizing the importance of real-time knowledge of localized ambient air pollen concentrations. Laser diode Optical Particle Counters (OPCs) are commonly used for monitoring particle number concentrations in ambient air.
View Article and Find Full Text PDFPediatr Pulmonol
May 2024
Beth Israel Deaconess Medical Center, Division of Pulmonary, Critical Care, and Sleep Medicine, Boston, Massachusetts, USA.
Introduction: Pollen exposure is known to exacerbate allergic asthma and allergic rhinitis symptoms, yet few studies have investigated if exposure to pollen affects lung function or airway inflammation in healthy children.
Methods: We evaluated the extent to which higher pollen exposure was associated with differences in airway inflammation and lung function among 490 early adolescent participants (mean age of 12.9 years) in Project Viva, a prebirth cohort based in Massachusetts.
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!