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Abstract Title:

Occupational exposure to aerosolized brevetoxins during Florida red tide events: effects on a healthy worker population.

Abstract Source:

Environ Health Perspect. 2005 May ;113(5):644-9. PMID: 15866778

Abstract Author(s):

Lorraine C Backer, Barbara Kirkpatrick, Lora E Fleming, Yung Sung Cheng, Richard Pierce, Judy A Bean, Richard Clark, David Johnson, Adam Wanner, Robert Tamer, Yue Zhou, Daniel G Baden

Article Affiliation:

National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Highway NE, MS F-46, Chamblee, GA 30341, USA. lbacker@cdc.gov

Abstract:

Karenia brevis (formerly Gymnodinium breve) is a marine dinoflagellate responsible for red tides that form in the Gulf of Mexico. K. brevis produces brevetoxins, the potent toxins that cause neurotoxic shellfish poisoning. There is also limited information describing human health effects from environmental exposures to brevetoxins. Our objective was to examine the impact of inhaling aerosolized brevetoxins during red tide events on self-reported symptoms and pulmonary function. We recruited a group of 28 healthy lifeguards who are occupationally exposed to red tide toxins during their daily work-related activities. They performed spirometry tests and reported symptoms before and after their 8-hr shifts during a time when there was no red tide (unexposed period) and again when there was a red tide (exposed period). We also examined how mild exercise affected the reported symptoms and spirometry tests during unexposed and exposed periods with a subgroup of the same lifeguards. Environmental sampling (K. brevis cell concentrations in seawater and brevetoxin concentrations in seawater and air) was used to confirm unexposed/exposed status. Compared with unexposed periods, the group of lifeguards reported more upper respiratory symptoms during the exposed periods. We did not observe any impact of exposure to aerosolized brevetoxins, with or without mild exercise, on pulmonary function.

Study Type : Human Study

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Sayer Ji
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Depression: 21st Century Solutions + The Dark Side of Wheat

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