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Quantitative trends in airborne loads of Celtis sinensis pollen and associations with meteorological variables in a subtropical Australian environment

100%

Green B. J., Dettmann M.

Annals of Agricultural and Environmental Medicine

2004

tom 11

nr 2

Celtis sinensis is an introduced plant species to the southeastern region of Queensland that has had a destructive affect on indigenous plant communities and its pollen has been identified as an allergen source. Pollen belonging to C. sinensis was sampled during a 5-year (June 1994-May 1999) atmospheric pollen-monitoring programme in Brisbane, Australia, using a Burkard 7-day spore trap. The seasonal incidence of airborne C. sinensis pollen (CsP) in Brisbane occurred over a brief period each year during spring (August-September), while peak concentrations were restricted to the beginning of September. Individual CsP seasons were heterogeneous with daily counts within the range 1-10 grains m-3 on no more than 60 sampling days; however, smaller airborne concentrations of CsP were recorded out of each season. Correlation co-efficients were significant each year for temperature (p<0.05), but were less consistent for precipitation (p>0.05) and relative humidity (p>0.05). A significant relationship (r2=0.81, p=0.036) was established between the total CsP count and preseasonal average maximum temperature; however, periods of precipitation (>2mm) were demonstrated to significantly lower the daily concentrations of CsP from the atmosphere. Given the environmental and clinical significance of CsP and its prevalence in the atmosphere of Brisbane, a clinical population-based study is required to further understand the pollen's importance as a seasonal sensitizing source in this region.

Measurement of personal exposure to outdoor aeromycota in Northern New South Wales, Australia

80%

Green B. J., O'Meara T., Sercombe J. K., Tovey E. R.

Annals of Agricultural and Environmental Medicine

2006

tom 13

nr 2

Aerobiological sampling traditionally uses a volumetric spore trap located in a fixed position to estimate personal exposure to airborne fungi. In this study, the number and identity of fungi inhaled by human subjects (n=34), wearing Intra-nasal air samplers (INASs), was measured over 2-hour periods in an outdoor community setting, and compared to fungal counts made with a Burkard spore trap and Institute of Occupational Medicine personal filter air samplers (IOMs). All sampling devices were in close proximity and located in an outdoor environment in Casino, northern New South Wales, Australia. Using INASs, the most prevalent fungi inhaled belonged to soil or vegetation borne spores of Alternaria, Arthrinium, Bipolaris, Cladosporium, Curvularia, Epicoccum, Exserohilum, Fusarium, Pithomyces, Spegazzinia and Tetraploa species, Xylariaceae ascospores, in addition to hyphal fragments. These results showed that inhaled fungal exposure in most people varied in a 2-fold range with 10-fold outliers. In addition, the INASs and personal air filters agreed more with each other than with Burkard spore trap counts (r=0.74, p<0.0001). These findings further support a new paradigm of personal fungal exposure, which implicates the inhalation of a spectrum of fungi more closely associated with soil or vegetation borne mycoflora and hyphal fragments than what is collected by stationary spore traps in the same geographic region.

Ograniczanie wyników

2 Annals of Agricultural and Environmental Medicine

2 Green B. J.

1 Dettmann M.

1 O'Meara T.

1 Sercombe J. K.

1 Tovey E. R.

1 2006

1 2004

Wyniki wyszukiwania

Quantitative trends in airborne loads of Celtis sinensis pollen and associations with meteorological variables in a subtropical Australian environment

Measurement of personal exposure to outdoor aeromycota in Northern New South Wales, Australia