Summer algae overgrowth and toxins

07/19/2011
Microcystin toxin has been identified by the Iowa DNR in Black Hawk Lake near Lake View in Sac County, Iowa. This is not an uncommon summer occurrence when the standing water in the lakes or ponds, high nutrient content and the heat create the perfect conditions for blue-green algae (cyanobacteria) to grow profusely creating “algal blooms”. These blooms can be many inches thick and usually float to the top of the water and cause the water to become cloudy. Microcytin toxin is released from the algae and can cause illness in animals or humans that swim in contaminated water. Ingesting large enough amounts of the toxin, such as animals drinking from the water’s edge where the algae accumulates, can even cause death. The toxin affects the liver and can cause signs such as weakness, loss of appetite, pale gums, confusion or behavior changes, and survivors may experience photosensitization. Of course, if you notice any of these signs seek immediate veterinary care. So, I hope you are enjoying your summer fun, just keep your pets out of those really scummy ponds!

Here is a link to more information on Cyanobacterial blooms at the CDC’s website.