Recreational Exposure to Low Concentrations of Microcystins During an Algal Bloom in a Small Lake
Author Information
Author(s): Backer Lorraine C., Carmichael Wayne, Kirkpatrick Barbara, Williams Christopher, Irvin Mitch, Zhou Yue, Johnson Trisha B., Nierenberg Kate, Hill Vincent R., Kieszak Stephanie M., Cheng Yung-Sung
Primary Institution: National Center for Environmental Health, Centers for Disease Control and Prevention
Hypothesis
Can microcystins be measured in blood from people engaged in recreational activities during an algal bloom?
Conclusion
The study found that participants had low levels of microcystins in their blood, and reported no increase in symptoms after exposure.
Supporting Evidence
- Blood levels of microcystins for all participants were below the limit of detection.
- Participants reported no symptom increases following recreational exposure to microcystins.
- Low concentrations of microcystins were found in water and aerosol samples.
Takeaway
This study looked at people swimming and boating in a lake with algae and found that they didn't get sick from the low levels of toxins in the water.
Methodology
The study involved measuring microcystins in blood, water, and air samples from participants engaged in recreational activities during an algal bloom.
Limitations
The study was limited by the low concentrations of microcystins detected, which may not represent higher exposure scenarios.
Participant Demographics
Participants ranged in age from 12 to 67 years, with 97% being white and 47% female.
Digital Object Identifier (DOI)
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