Document Detail

Volumetric assessment of airborne pollen and spore levels in Rochester, Minnesota, 1992 through 1995.
MedLine Citation:
PMID:  9511779     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To reassess airborne pollen counts and to study spore counts by volumetric collection in Rochester, Minnesota.
MATERIAL AND METHODS: Samples of pollen and spores were collected from the top of a six-story building in downtown Rochester by use of a rotational rod sampler, which was activated for 30 seconds every 10 minutes for 24 hours a day, 5 days a week, from mid-April to mid-October 1992 through 1995. Particles were stained with Calberla's fluid and viewed microscopically by transmitted light. Identifications were substantiated by comparison with field-collected "known" materials and standard reference guides. Data were expressed as "particles retained/cubic meter of air sampled."
RESULTS: Because the methods of collection varied, only qualitative comparisons could be made with a study done in Rochester more than 3 1/2 decades earlier. For tree pollens, a similar progression of appearance and seasonal duration were noted for most species. Alder (Alnus), willow (Salix), and hickory-pecan (Carya), however, were found to have distinctly longer seasons, and walnut (Julgans) was detected 2 weeks earlier in the season. The most frequently detected tree pollen had changed from oak (Quercus) to apple and crab apple (Malus), which was not reported at all previously. Ragweed (Ambrosia) was still found to peak at the end of August and had a similar duration. Study of grass and nettle pollen as well as the Amaranthaceae-Chenopodiaceae complex yielded findings similar to those in the prior investigation. Fungal spores were detected from April through October and represented a substantial percentage of the airborne allergens; Cladosporium, ascospores, and basidiospores were the most common.
CONCLUSION: Volumetric assessment of airborne pollen and spore levels in Rochester, Minnesota, yielded useful information for clinicians in southern Minnesota that could help direct skin test selection.
M L Decco; B I Wendland; E J O'Connell
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Mayo Clinic proceedings     Volume:  73     ISSN:  0025-6196     ISO Abbreviation:  Mayo Clin. Proc.     Publication Date:  1998 Mar 
Date Detail:
Created Date:  1998-03-26     Completed Date:  1998-03-26     Revised Date:  2013-12-13    
Medline Journal Info:
Nlm Unique ID:  0405543     Medline TA:  Mayo Clin Proc     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  225-9     Citation Subset:  AIM; IM    
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MeSH Terms
Air / analysis*

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

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