Contaminant Biology

Cyanotoxins and Harmful Algal blooms

Filter Total Items: 21
Date published: August 26, 2020
Status: Completed

Review of Cyanobacterial Neurotoxins—Information for Prioritizing Future Science Directions

The current state of knowledge on the modes of action, production, fate, and occurrence of the freshwater cyanobacterial neurotoxins, anatoxin-a and saxitoxin, was reviewed and synthesized to identify gaps and critical research needs to better understand the health effects of algal toxins.

Date published: February 10, 2020
Status: Completed

Satellite Data Used to Estimate and Rank Cyanobacterial Bloom Magnitude in Florida and Ohio Lakes—Developing Tools to Protect Human and Wildlife Health from Cyanotoxin Exposure

Cyanobacterial bloom magnitude during 2003–11 was quantified and ranked in Florida and Ohio lakes with a newly developed modelling tool that allows for the use of multiple satellite data sources and user-defined thresholds. This tool was designed to identify the magnitude of algal blooms, but one metric alone cannot adequately represent the severity of a bloom of interest in terms of toxicity...

Contacts: Keith A Loftin, Ph.D., Sachi Mishra
Date published: January 15, 2020
Status: Completed

Mixtures of Algal Toxins Present Prior to and After Formation of Visible Algal Blooms—Science to Inform the Timing of Algal Toxin Exposure

Cyanobacteria with toxin-producing potential, genes indicating an ability for toxin synthesis, or cyanotoxins were present before and after formation of a visible algal bloom in Kabetogama Lake, a popular recreation area in Voyageurs National Park that lies along the border of Minnesota and Canada. The temporal patterns observed in this study indicate that sampling only when there is a visible...

Date published: November 27, 2018
Status: Completed

Understanding Drivers of Cyanotoxin Production in the Lake Okeechobee Waterway

The U.S. Geological Survey (USGS) and other researchers combined field and laboratory approaches in two studies to understand the factors that drive cyanobacterial bloom development and associated cyanotoxin production in Lake Okeechobee, the St. Lucie River and Estuary, and the Indian River Lagoon in response to the large-scale Lake Okeechobee cyanobacteria bloom in 2016.

Date published: September 26, 2018
Status: Active

Can There be Unintended Benefits when Wastewater Treatment Infrastructure is Upgraded?

Science from the U.S. Geological Survey (USGS) and other entities has shown that a mixture of natural and synthetic estrogens and other similar chemicals are discharged from wastewater treatment plants (WWTPs) to streams and rivers.

USGS and University of Colorado hydrologists, chemists, geologists, and biologists studied the chemistry and biology of Boulder Creek downstream of Boulder ...

Date published: September 24, 2018
Status: Active

Are Naturally Occurring Algal Toxins in Water Resources a Health Hazard?

A growing number of human gastrointestinal, respiratory, dermatologic, and neurologic effects, as well as dog and livestock illnesses and deaths, in the United States have been linked to exposures to algal blooms in recreational lakes and stock ponds.

Some of the blooms contain cyanobacteria, which have the potential to produce cyanotoxins in freshwater systems. However, the connection...

Date published: September 11, 2018
Status: Active

Water and Wastewater Infrastructure Science Team

The team studies toxicants and pathogens in water resources from their sources, through watersheds, aquifers, and infrastructure to human and wildlife exposures. That information is used to develop decision tools that protect human and wildlife health.

Date published: September 11, 2018
Status: Active

Toxins and Harmful Algal Blooms Science Team

The team develops advanced methods to study factors driving algal toxin production, how and where wildlife or humans are exposed to toxins, and ecotoxicology.  That information is used to develop decision tools to understand if toxin exposure leads to adverse health effects in order to protect human and wildlife health....

Date published: August 30, 2018
Status: Active

Algal and Other Environmental Toxins — Lawrence, Kansas

About the Laboratory

The Environmental Health Program collaborates with scientists at the Organic Geochemistry Research Laboratory (OGRL) in Lawrence, Kansas, to develop and employ targeted and non-targeted analytical methods for identification and quantitation of known and understudied algal/cyanobacterial toxins.  The laboratory contructed  in 2019 is a 2,500 square...

Date published: August 30, 2018
Status: Active

Geospatial Analyses and Applications — Salt Lake City, Utah

About the Research

The Environmental Health Program collaborates with scientists within the Geospatial Analyses and Applications Team to develop and apply geospatial analytical methods to answer broad-scale questions about source-sink and cause-effect relationships between contaminants and vulnerable communities. Multivariate statistics are used to identify connections...

Date published: August 29, 2018
Status: Active

Michigan Bacteriological Research Laboratory

Microbiologists at the Michigan Bacteriological Research Laboratory (MI-BaRL) use a wide array of traditional and modern molecular approaches to evaluate microbial pathogens and antimicrobial resistance pathways in the environment.

Date published: August 29, 2018
Status: Active

Photomicroscopy and Flow Cytometry — Lafayette, Louisiana

About the Research

The Environmental Health Program collaborates with microbiologists at the Photomicroscopy and Flow Cytometry Laboratory to develop and apply biomarkers to evaluate the potential impacts of environmental contaminants at the cellular and molecular levels. Because molecular and biochemical responses of cells are preceded by chemical changes in nuclei,...