Document Detail


Air pollution and young children's inhalation exposure to organophosphorus pesticide in an agricultural community in Japan.
MedLine Citation:
PMID:  15979719     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Assessment of airborne organophosphorus pesticides in houses of young children (1-6 years old) and childcare facilities was conducted following pesticide applications in an agricultural community in Japan. Trichlorfon and fenitrothion, applied in two separate periods, were frequently detected from outdoor and indoor air. Dichlorvos, the primary degradation product of trichlorfon, was also detected after the application of trichlorfon. Both the outdoors and indoor concentration of applied pesticide were shown to increase with decreasing distance from the pesticide-applied farm. Indoor concentration of these pesticides significantly correlated with outdoor concentration (p=0.001 for trichlorfon and p=0.001 for fenitrothion), indicating infiltration of applied pesticide inside. Ratio of indoor to outdoor concentration (I/O ratio) of fenitrothion was higher for houses with windows open during the application than those with closed windows (median value: 0.74 vs. 0.16, p=0.003). However, a similar trend was not observed for trichlorfon as well as dichlorvos in the first period. Dichlorvos was found to have a higher I/O ratio than trichlorfon during the period, and clear correlation between indoor concentrations of dichlorvos and those of trichlorfon suggested increased decomposition of trichlorfon in the indoor environment. Daily inhalation exposure estimated by using the fixed measurement data and time-activity questionnaire ranged from 0 to 35 ng/kg/day for trichlorfon, from 0 to 26 ng/kg/day for dichlorvos, and from 0 to 44 ng/kg/day for fenitrothion. Median inhalation exposure from indoor air accounted for 74%, 86.3%, and 45% of the daily inhalation exposure, respectively. For kindergarteners or nursery school children, inhalation exposure at childcare facilities was comparable with or more than that at home, indicating that pollution level at childcare facilities had potential of high impact on children's exposure. Estimated daily inhalation exposures were inversely correlated to the proximity of their activity location to the pesticide-applied farm.
Authors:
Junko Kawahara; Ryoko Horikoshi; Takashi Yamaguchi; Kazukiyo Kumagai; Yukio Yanagisawa
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Environment international     Volume:  31     ISSN:  0160-4120     ISO Abbreviation:  Environ Int     Publication Date:  2005 Oct 
Date Detail:
Created Date:  2005-08-30     Completed Date:  2005-12-07     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7807270     Medline TA:  Environ Int     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1123-32     Citation Subset:  IM    
Affiliation:
Department of Environmental System Institute of Environmental Studies, Graduate School of Frontier Sciences, The University of Tokyo, Japan. junko.kawahara@yy.t.u-tokyo.ac.jp
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MeSH Terms
Descriptor/Qualifier:
Air Pollution, Indoor / analysis*
Child
Child, Preschool
Environmental Exposure*
Environmental Monitoring
Female
Humans
Infant
Inhalation Exposure*
Japan
Male
Organophosphorus Compounds / analysis
Pesticides / analysis*
Ventilation
Chemical
Reg. No./Substance:
0/Organophosphorus Compounds; 0/Pesticides

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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