Blue-Green Algae

Blue-green algae is a term used to describe a group of bacteria, called cyanobacteria.

They are not actually algae, but the organisms got this name because they often give the appearance of algae when they clump together in bodies of water.

The bacteria cannot be seen with the naked eye unless they clump together. When this happens, blue-green algae can look like green flakes, greenish bundles or brown dots in a pond, lake or stream.

When the algae blooms, it can give look like a blue-green scum has appeared on the surface of the water. It sometimes looks a bit like pea soup.

Blooms of the organisms often build up around the edges of ponds and lakes, which may look like foam.

It is most common in non-flowing fresh water such as lakes and ponds during hot weather when there is less rainfall, but can also occur at other times of the year.

You may notice dead fish in ponds or lakes with a high concentration of the toxic bacteria. Don’t let your dog drink from water containing dead animals.

The algae may be present in a harmful form even if you cannot see it, so take note of any warning signs in the area.

 

Why is blue-green algae dangerous to dogs?

Blooms of blue-green algae can produce harmful toxins which stop a dog’s liver from functioning properly. However, not all types of blue-green algae are dangerous.

Sadly, exposure to toxic blue-green algae is often fatal, and can also cause long term health problems in dogs that survive after drinking or swimming in algae-contaminated water. Some types of blue-green algae can kill a dog just 15 minutes to an hour after drinking contaminated water.

Dogs who have been swimming in water can get the algae caught in their fur, and can ingest it while cleaning themselves later on.

Concentrations of the algae vary throughout the year and may not always be harmful – but you can’t tell simply by looking at them whether or not they are dangerous, so it is best not to run the risk of allowing your dog to come into contact with water where the algae may be present.

 

For more information please visit: https://www.bluecross.org.uk/

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