Recreational exposure to low concentrations of microcystins during an algal bloom in a small lake.

Marine Drugs
Lorraine C BackerYung-Sung Cheng

Abstract

We measured microcystins in blood from people at risk for swallowing water or inhaling spray while swimming, water skiing, jet skiing, or boating during an algal bloom. We monitored water samples from a small lake as a Microcystis aeruginosa bloom developed. We recruited 97 people planning recreational activities in that lake and seven others who volunteered to recreate in a nearby bloom-free lake. We conducted our field study within a week of finding a 10-microg/L microcystin concentration. We analyzed water, air, and human blood samples for water quality, potential human pathogens, algal taxonomy, and microcystin concentrations. We interviewed study participants for demographic and current health symptom information. Water samples were assayed for potential respiratory viruses (adenoviruses and enteroviruses), but none were detected. We did find low concentrations of Escherichia coli, indicating fecal contamination. We found low levels of microcystins (2 microg/L to 5 microg/L) in the water and (<0.1 ng/m(3)) in the aerosol samples. Blood levels of microcystins for all participants were below the limit of detection (0.147 microg/L). Given this low exposure level, study participants reported no symptom increases following recr...Continue Reading

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Citations

May 11, 2013·Chemosphere·Xianing HuangKangding Gu
Dec 17, 2008·Environmental Health : a Global Access Science Source·Stephanie K MooreLora E Fleming
Nov 21, 2009·Environmental Health : a Global Access Science Source·Ian StewartGlen R Shaw
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Jul 21, 2009·Toxicon : Official Journal of the International Society on Toxinology·Lorraine C BackerYung-Sung Cheng
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Methods Mentioned

BETA
ELISA
PCR
Enzyme-Linked Immunosorbent Assay

Software Mentioned

SAS
Xcalibur
STAT

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