"The Emory team has experience with a comprehensive emergency department database, and the UGA team can provide a much more refined characterization of thunderstorms than was performed in the previous studies of this question," she said. "The study will thus provide new insight into the mechanisms under the phenomenon of thunderstorm-induced asthma."
The research was published in the online edition of the medical journal Thorax. Other authors of the paper include: Marshall Shepherd and Thomas Mote from the UGA department of geography; Luke Naeher from the UGA department of environmental health science; and Stefanie Ebelt Sarnat and Mitchell Klein, who along with Tolbert are from the department of environmental and occupational health in the Rollins School of Public Health at Emory.
About 20 million Americans have asthma, according to the American Academy of Allergy, Asthma and Immunology. There has also been a dramatic increase in reported cases of the disease, with its prevalence increasing 75 percent between 1980 and 1994. Some 5,000 Americans die annually from asthma attacks.
Approximately 210,000 Georgia children under the age of 17 have asthma, according to the Division of Public Health of the Georgia Department of Human Resources. Some 65 percent of that number had an attack within the last year.
While associations between thunderstorm activity and asthma deaths and emergency room visits have been reported around the world, virtually no studies have been done in the American South, where hundreds of thousands suffer from asthma and thunderstorms are prevalent.
Some people may find it odd that thunderstorms, which supposedly "clear the air" of pollen and pollutants, are implicated in asthma attacks. The most prominent hypothesis as to why it happens, the authors of the paper say, is that "pollen grains may rupture upon contact with rainwater, releasing respirable allergen
|Contact: Kim Osborne|
University of Georgia