Influence of outdoor aeroallergens on hospitalization for asthma in Canada

Dales, Robert; Cakmak, Sabit; Judek, Stan; Dann, Tom; Coates, Frances; Brook, Jeffrey R.; Burnett, Richard T.

doi:10.1016/j.jaci.2003.11.016

Cited by 163 publications

(121 citation statements)

References 23 publications

(14 reference statements)

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“…The personal exposure to airborne fungal spores and their components is strongly linked to allergic diseases and dysfunction of respiratory system including allergic rhinitis, bronchopulmonary, and hypersensitivity diseases (Koppelman, 2007) pneumonitis and bronchial asthma (Masoli et al, 2004;Bousquet et al, 2008). In general, the admission rate to emergency department because of allergy to airborne fungal spores increases and hospitalization period for respiratory diseases extends as well (Dales et al, 2004;Atkinson et al, 2006).…”

Section: Airborne Fungal Spores and Allergymentioning

confidence: 99%

Dynamics (seasonal and intra-diurnal) of air-borne fungal spore population of Doha area, Qatar

Fayad

2016

Qatar University Life Science Symposium 2016: Biodiversity, Sustainability and Climate Change, With Perspectives From Qatar

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Section: Airborne Fungal Spores and Allergymentioning

confidence: 99%

Dynamics (seasonal and intra-diurnal) of air-borne fungal spore population of Doha area, Qatar

Fayad

2016

Qatar University Life Science Symposium 2016: Biodiversity, Sustainability and Climate Change, With Perspectives From Qatar

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“…As there is uncertainty regarding the shape of the concentrationresponse functions and the possibility of threshold levels of aeroallergens and allergic disease outcomes (Anderson et al, 1998;Stieb et al, 2000;Dales et al, 2004), we used a two-stage approach to our analysis. First, we used generalized additive models (GAM) with penalized cubic regression splines to assess the shape of the concentrationresponse curves at each lag (Wood, 2004).…”

Section: Statistical Modelingmentioning

confidence: 99%

Pollen Loads and Allergic Rhinitis in Darwin, Australia: A Potential Health Outcome of the Grass-Fire Cycle

2009

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Although the prevalence of asthma and allergic rhinitis has been increasing in tropical regions, little is known about the allergenicity of pollens from tropical plant families or the importance of ongoing environmental changes. We investigated associations between daily average pollen counts of several tropical plant families and sales of medications for the treatment of allergic rhinitis in Darwin, Australia-a tropical setting in which grass abundance has increased due to increased fire frequencies and the introduction of African pasture grasses. Daily pollen counts with detailed identification of plant species were undertaken in conjunction with a weekly survey of flowering plant species from April 2004 to November 2005. Five pharmacies provided daily sales data of selected medications commonly used to treat allergic rhinitis. We used generalized linear modeling to examine outcomes.All analyses accounted for the potential confounding effects of time trends, holidays, respiratory viral illnesses, meteorological conditions, and air pollution. The peak total pollen count was 94 grains/m 3 . Despite the low levels of Poaceae (grass) pollen (maximum daily count, 24 grains/m 3 ), there was a clear association with daily sales of anti-allergic medications greatest at a lag of 1 day. Sales increased by 5% with an interquartile range rise (3 grain/ m 3 ) in Poaceae pollen (5.07%, 95%CI 1.04%, 9.25%). No associations were observed with pollen from other plant families. Although further testing is required, we suggest that an overlooked aspect of the ''grass-fire cycle'' that is degrading many tropical landscapes, could be an increase in the prevalence of allergic rhinitis.

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“…The general behavior of the atmospheric concentration of fungal spores with a cyclical behavior, showed an increased in concentration spores/m 3 in three stages: the first in March (503 spores/m 3 , and an average daily. As a result of calculating the rate of lung exposure to fungal spores (RLE), which may happen in a typical day, there is a possibility that on average 164 spores/day make contact with the mucus of the airways.…”

Section: Resultsmentioning

confidence: 99%

“…The concern about the harmful effects caused by air pollution is higher every day; an affection that has led to investigate the relation between the concentrations of air pollutants and respiratory tract problems in different age groups, as well as to find meaningful relationships in epidemiological terms [1,2]. In such studies are taken in consideration different concentrations of air pollutants, weather variations, time of exposure and its health impacts on different age groups [3,4].…”

Section: Introductionmentioning

confidence: 99%

The relationship between air pollution caused by fungal spores in Mexicali, Baja California, Mexico, and the incidence of childhood asthma

Fuente-Ruiz

Quintero-Núñez²,

Ahumada³

et al. 2009

WIT Transactions on Ecology and the Environment

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Air pollution has affected human life progressively since its sources of origination. It is present in all cities around the world. It has caused harm to humans and other living organisms. This situation has led studies to determine the impact of concentrations of air pollutants in the respiratory ailments. Mexico has developed similar investigations, but unlike other countries' advanced studies on pollutants aerobiology, Mexico's studies have not been conducted in depth, and there is virtually no research work that identifies the air pollutants of fungal spores and their association with respiratory disorders in children. The purpose of this article is to analyze the relationship between air pollution by fungal spores, and the incidence of childhood asthma in Mexicali, Baja California, Mexico. Diagnostics of asthma on children living in the city of Mexicali that received medical care were studied. The records of weather and climatic variables were provided by the Department of Meteorology at the Engineering Institute of UABC. The data of air pollution caused by fungal spores were obtained in three monitoring stations with collectors' rotation and impact of sampling. Mainly four groups of different spores (Alternaria sp., Cladosporiun sp., Bipolaris and Stemphylium) were registered in the atmosphere of Mexicali, with an average of 515 spores/m 3 and a standard deviation of 248 spores/m 3 . The average annual relative humidity was 42.3%. The average temperature showed two different facets; a hot season with temperatures between 22ºC and 44ºC, and a cold season with temperatures between 8.9ºC and 22ºC. The incidence of childhood asthma presented a rate twice the national average (505 cases/one hundred thousand children). The multiple linear regression model proposed showed a significant relationship with a R2=0.86 (p=0.5), which established a direct association between air pollution by fungal spores, and the incidence of childhood asthma.

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Influence of outdoor aeroallergens on hospitalization for asthma in Canada

Cited by 163 publications

References 23 publications

Dynamics (seasonal and intra-diurnal) of air-borne fungal spore population of Doha area, Qatar

Dynamics (seasonal and intra-diurnal) of air-borne fungal spore population of Doha area, Qatar

Pollen Loads and Allergic Rhinitis in Darwin, Australia: A Potential Health Outcome of the Grass-Fire Cycle

The relationship between air pollution caused by fungal spores in Mexicali, Baja California, Mexico, and the incidence of childhood asthma

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