NDLI: Meteo-climatic conditions influence the contribution of endotoxins to PM10 in an urban polluted environment.

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Year: 2010 Volume: 12 Issue: 1

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Meteo-climatic conditions influence the contribution of endotoxins to PM10 in an urban polluted environment.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Traversi, D. Alessandria, L. Schilirò, T. Chiadò Piat, S. Gilli, G.
Spatial Coverage	Italy
Description	Country affiliation: Italy Author Affiliation: Traversi D ( Department of Public Health and Microbiology, University of Turin, via Santena 5 bis 10126, Turin, Italy. deborah.traversi@unito.it)
Abstract	A decrease in inhalable particulate matter (PM10) pollution is a top priority in urban areas of northern Italy. The sources of PM10 are both anthropogenic and natural. The former have been broadly investigated while the latter are less well known. Endotoxins are natural compounds of PM10 and are potentially toxic. Endotoxins are part of the outer membrane of Gram-negative bacteria. Their health effects are linked to environmental exposure. The effects mainly consist of respiratory symptoms, including pulmonary function decline. The occurrence of endotoxins has been proven in several occupational environments where organic materials supply an optimal substrate for bacteria growth. Knowledge about the presence of these contaminants in the environment is limited. The aim of this work is to evaluate the endotoxin levels of PM10 in the urban air of Turin, and to investigate the influence of seasonal and meteo-climatic factors. The sampling was conducted from January to December 2007. Endotoxin determination was performed by an LAL assay after extraction optimization. The PM10 levels ranged from 11.90 to 104.74 microg/m(3) (48.28 +/- 23.09) while the endotoxin levels ranged between 0.09 and 0.94 EU/m(3) (0.42 +/- 0.23). The seasonal trends of PM10 and endotoxin are inversely proportional. There is a statistically significant correlation between endotoxin and temperature (r = 0.532 p < 0.01), as well as between endotoxin and relative humidity (r = -0.457 p < 0.01). However, temperature has a predominant role. We observed that urban endotoxin concentrations are narrow in range and that the contribution of endotoxins to the total PM10 is only two millionths.
File Format	HTM / HTML
ISSN	14640325
Issue Number	2
Volume Number	12
e-ISSN	14640333
Journal	Journal of Environmental Monitoring
Language	English
Publisher	Royal Society of Chemistry
Publisher Date	2010-02-01
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Discipline Environmental Health Endotoxins Chemistry Environmental Exposure Analysis Particulate Matter Climate Humans Italy Limulus Test Longitudinal Studies Seasons Statistics, Nonparametric Urban Population Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Public Health, Environmental and Occupational Health Management, Monitoring, Policy and Law

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Meteo-climatic conditions influence the contribution of endotoxins to PM10 in an urban polluted environment.

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