Hot summer weather can contribute to the production of blue-green algae (cyanobacteria) in bodies of water that are used by people, pets and livestock. Exposure from ingested water contaminated by blue-green algae can cause illness and can result in death. There are no known antidotes for the toxins produced by blue-green algae. Recent reports of a blue-green algae bloom in Homme Dam near Park River have prompted local officials to issue exposure warnings for the water at that recreational site.
The North Dakota Departments of Health (NDDoH) and Agriculture (NDDA), Animal Health Division, urge the public to avoid contact with or swallowing water affected by blue-green algae, and to protect their pets and livestock from waters that are affected.
Blue-green algae discolor water, and can cause foam, scum, or mats to appear on the surface. The NDDoH can test water for toxins, and if they are detected, can issue warnings to the public. However, because it can take time to test water, people are urged to err on the side of caution and avoid waters that look discolored or scummy, or that have a foul odor.
According to Dr. Susan Keller, state veterinarian, these algae blooms are most common in North Dakota in late summer. However, it only takes a few hot days, like the ones we have been experiencing recently, to cause the algae to bloom. “Blue-green algae normally can be found in many lakes and pasture watering holes,” Keller said. “Reports of blue-green algae in Walsh County remind us to be on the alert for algae blooms throughout the state.”
People and animals that swallow water containing cyanotoxins can become sick with severe diarrhea and vomiting; numb lips, tingling fingers and toes; dizziness; or rashes, hives or skin blisters. Children are at higher risk than adults for illness because their smaller size can allow them to ingest a relatively larger dose of toxin.
For more information about the effects of blue-green algae blooms on pets and livestock, contact the Animal Health Division, North Dakota Department of Agriculture at 701.328.2655.
