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Personal exposure to aerosolized red tide toxins (brevetoxins).

Authors
Cheng-YS; Zhou-Y; Naar-J; Irvin-CM; Su-WC; Fleming-LE; Kirkpatrick-B; Pierce-RH; Backer-LC; Baden-DG
Source
J Occup Environ Hyg 2010 Jun; 7(6):326-331
NIOSHTIC No.
20036694
Abstract
Florida red tides occur annually in the Gulf of Mexico from blooms of the marine dinoflagellate, Karenia brevis, which produces highly potent natural polyether toxins, brevetoxins. Several epidemiologic studies have demonstrated that human exposure to red tide aerosol could result in increased respiratory symptoms. Environmental monitoring of aerosolized brevetoxins was performed using a high-volume sampler taken hourly at fixed locations on Siesta Beach, Florida. Personal exposure was monitored using personal air samplers and taking nasal swab samples from the subjects who were instructed to spend 1 hr on Sarasota Beach during two sampling periods of an active Florida red tide event in March 2005, and in May 2008 when there was no red tide. Results showed that the aerosolized brevetoxins from the personal sampler were in modest agreement with the environmental concentration taken from a high-volume sampler. Analysis of nasal swab samples for brevetoxins demonstrated 68% positive samples in the March 2005 sampling period when air concentrations of brevetoxins were between 50 to 120 ng/m(3) measured with the high-volume sampler. No swab samples showed detectable levels of brevetoxins in the May 2008 study, when all personal samples were below the limit of detection. However, there were no statistical correlations between the amounts of brevetoxins detected in the swab samples with either the environmental or personal concentration. Results showed that the personal sample might provide an estimate of individual exposure level. Nasal swab samples showed that brevetoxins indeed were inhaled and deposited in the nasal passage during the March 2005 red tide event. Erratum:
Keywords
Aerosol-particles; Airborne-particles; Air-contamination; Air-sampling; Air-sampling-techniques; Environmental-contamination; Environmental-exposure; Environmental-hazards; Environmental-health; Environmental-health-monitoring; Inhalation-studies; Laboratory-testing; Particle-counters; Particulate-sampling-methods; Qualitative-analysis; Respiratory-hypersensitivity; Respiratory-infections; Respiratory-irritants; Sampling-methods; Statistical-analysis; Toxic-effects; Toxins; Author Keywords: aerosol; personal aerosol sampler; personal exposure
Contact
Yung Sung Cheng, Lovelace Respiratory Research Institute, 2425 Ridgecrest Dr., SE, Albuquerque, NM 87108
CODEN
JOEHA2
Publication Date
20100601
Document Type
Journal Article
Email Address
ycheng@lrri.org
Funding Type
Grant
Fiscal Year
2010
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R01-OH-008913
Issue of Publication
6
ISSN
1545-9624
Source Name
Journal of Occupational and Environmental Hygiene
State
NM
Performing Organization
Lovelace Biomedical & Environmental Research
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