Document Detail

Heterogeneity in microbial exposure in schools in Sweden, Poland and Jordan revealed by analysis of chemical markers.
MedLine Citation:
PMID:  15254476     Owner:  NLM     Status:  MEDLINE    
We used gas chromatography--tandem mass spectrometry to analyze microbial components in 85 samples of airborne dust from schools in Jordan, Sweden, and Poland. To collect the samples, we allowed dust to settle on plexiglass plates hanging in the breathing zone in school buildings during both summer and winter. In each of the three countries, we conducted such sampling in two schools: one in an urban environment and the other in rural surroundings. The microbial marker profiles differed significantly between the schools and seasons. For example, samples from Jordan contained remarkably low levels of ergosterol (marker of fungal biomass) and high levels of 3-hydroxy acids (markers of lipopolysaccharide) of 10, 12, and 14 carbon chain lengths relative to such acids of 16 and 18 carbons in comparison with samples from Sweden and Poland. This dissimilarity in 3-hydroxy fatty acid distribution indicates significant differences in the populations of Gram-negative bacteria. We also noted that muramic acid (marker of bacterial biomass) exhibited the smallest variation between schools and seasons. In summary, our results demonstrate that exposure to microorganisms in indoor air in school buildings may differ markedly between countries, between seasons, and between urban and rural environments.
Loay Wady; Asem Shehabi; Bogumila Szponar; Christina Pehrson; Yezhou Sheng; Lennart Larsson
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of exposure analysis and environmental epidemiology     Volume:  14     ISSN:  1053-4245     ISO Abbreviation:  J Expo Anal Environ Epidemiol     Publication Date:  2004 Jul 
Date Detail:
Created Date:  2004-07-15     Completed Date:  2005-05-03     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9111438     Medline TA:  J Expo Anal Environ Epidemiol     Country:  England    
Other Details:
Languages:  eng     Pagination:  293-9     Citation Subset:  IM    
Department of Medical Microbiology, Dermatology and Infection, Lund University, Sölvegatan 23, 223 62 Lund, Sweden.
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MeSH Terms
Air Microbiology*
Air Pollution, Indoor*
Analysis of Variance
Biological Markers / analysis*
Child, Preschool
Dust / analysis*
Ergosterol / analysis
Fatty Acids / analysis
Muramic Acids / analysis
Reproducibility of Results
Rural Health
Urban Health
Reg. No./Substance:
0/Biological Markers; 0/Dust; 0/Fatty Acids; 0/Muramic Acids; 57-87-4/Ergosterol

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