Document Detail

Meteorologic Conditions and Respiratory Syncytial Virus Activity.
MedLine Citation:
PMID:  22572747     Owner:  NLM     Status:  Publisher    
BACKGROUND:: The factors that determine the initiation and persistence of yearly epidemics of respiratory syncytial virus (RSV) bronchiolitis are not well known. A limited number of studies have found that meteorologic conditions could be associated with RSV activity. OBJECTIVES:: We analyze the association of certain atmospheric conditions to RSV activity, as determined by the number of hospitalizations of infants with bronchiolitis in Mallorca (Spain). METHODS:: We conducted a retrospective review of the medical records of children ≤ 2 years of age with acute bronchiolitis between January 1995 and December 2006. Climatic data were obtained from a weather station located 15 km from the hospital. The number of RSV hospitalizations were correlated to temperature, barometric pressure, relative humidity, and water vapor pressure using different time-models and regression analyses. RESULTS:: A total of 1495 infants with RSV bronchiolitis were hospitalized during the study period, with a seasonal pattern from November to March. Weekly RSV activity could be predicted (R= 0.88; p<0.001) by mean temperature and atmospheric pressure. Monthly RSV activity was significantly associated (R= 0.95; p<0.001) with mean and minimum temperature, water vapor pressure, relative humidity and barometric pressure. The peak of RSV activity was observed within 9°C mean temperature, 5°C minimum temperature, 16°C maximum temperature, 1032hPa atmospheric pressure, 83% relative humidity and 910hPa water vapor pressure. CONCLUSIONS:: The annual patterns of RSV hospitalizations were strongly associated with the meteorologic conditions. The mean temperature and atmospheric pressure were the main factors that correlated with increases and declines in RSV activity.
Daniel Hervás; Jordi Reina; Juan A Hervás
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-5-8
Journal Detail:
Title:  The Pediatric infectious disease journal     Volume:  -     ISSN:  1532-0987     ISO Abbreviation:  -     Publication Date:  2012 May 
Date Detail:
Created Date:  2012-5-10     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8701858     Medline TA:  Pediatr Infect Dis J     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
*University Institute of Health Sciences-IUNICS (University of the Balearic Islands), Palma de Mallorca, Spain §Department of Microbiology, Palma de Mallorca, Spain ¶Department of Pediatric Infectious Diseases (Son Espases University Hospital), Palma de Mallorca, Spain.
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