Be aware - toxic algae levels on the rise
As temperatures continue to soar, the river becomes one of the most popular places for people and their pooches to cool down. At this time, it is important to be aware that the water may contain a potentially poisonous substance and to be on the look out for it.
There are over 2000 species of cyanobacteria, or "blue-green algae", of which approximately 40 are known to produce toxins. Freshwater and brackish water species cause problems for livestock and dogs, and will often form "blooms" in the summer months when water is slow-flowing and warm.
Depending on the volume eaten, blue-green algae ingestion can lead to liver damage, jaundice and photosensitisation, whereby the skin becomes sensitive to UV light. If a large amount is eaten, the animal may die.
Symptoms of this toxicity include
- Lethargy
- Muscle tremors or convulsions
- Paralysis
- Diarrhoea
- Difficulty breathing (fast shallow breaths)
- Salivation
While most documented cases of poisoning involve livestock drinking from contaminated lakes or puddles, there have been cases where dogs have been affected after swimming in infected rivers and drinking the water.
Recently, the algae has been found in rivers and streams to the east of the Manawatu ranges. Horizons Regional Council has reported that it is highly likely the organism is present in areas of the lower Manawatu and Mangatainoka, although toxicity testing has not been completed.
During this time, while the environmental conditions favour the growth of cyanobacteria, it would be wise to check the river and any other water bodies prior to allowing your animals to swim in or drink the water. If in doubt, contact Horizins Regional Council on 0508 800 800, or click on http://www.horizons.govt.nz for the latest news.
If you suspect your dog has swallowed contaminated water after swimming at the river, please contact the Feilding clinic as soon as possible. If possible, try to make the animal vomit immediately after ingestion. This can be achieved at home using washing soda crystals (sodium carbonate 44%). Place one or two crystals at the back of the tongue and take the animal outside. Any animals showing symptoms of poisoning will require aggressive treatment and should see one of our vets as quickly as possible.
