News Video | Policy | GPs | Hospitals | Medical | Mental Health | Welfare | Search

 

Potentially toxic blue-green algae found in Otago

December 6, 2012

Potentially toxic blue-green algae found in Otago

The Otago Regional Council (ORC) is warning the public to avoid contact and keep their dogs away from two popular Otago swimming locations after the discovery of potentially toxic algal blooms over the past two days.

ORC director of environmental information and science John Threlfall said Lake Waihola south of Dunedin and the upper Tomahawk lagoon contain the potentially toxic blue-green algae Anabaena lemmermannii.

This algae, which is dark green, can produce a series of toxins which are then passed to the water and can be fatal to dogs and cause illness in people.

Otago-Southland medical officer of health Dr Marion Poore said people swimming in water with increased levels of algal bloom have been known to develop allergic reactions: asthma, eye irritations, rashes, blistering around the mouth and nose, and gastro-intestinal disorders, including abdominal pain, cramps, and diarrhoea.

People should not swim in Lake Waihola and Tomahawk lagoon, and other water users, including fishermen and boat users, should exercise caution, Dr Poore said.

Any reaction depends on the type of toxins present, and the concentration of the toxin in the water. The higher the concentration of toxins and the longer the contact with the water, the more severe the symptoms are likely to be.

Dogs are particularly susceptible to poisoning from both mat-forming and free-floating toxic algae as they enjoy being in the water and can consume these algae intentionally or by accident. Livestock are also at risk from poisoning from cytotoxins and should be provided with alternative drinking water.

Symptoms of poisoning in animals exposed to the type of toxins present in anabaena mats include lethargy, muscle tremors, fast breathing, twitching, paralysis, convulsions. In extreme cases, death can occur within 30 minutes after signs first appear.

“In the case of illness or suspected illness after swallowing water containing algal bloom, seek advice from your doctor. If your animals become sick, contact your veterinarian immediately," Dr Poore said.

ORC will put out warning signs at the locations where the algae has been found and will continue to monitor the situation.

ENDS

© Scoop Media

 
 
 
 
 
Culture Headlines | Health Headlines | Education Headlines

 
Kakī: World’s Rarest Wading Bird Released In Mackenzie Basin

Conservation Minister Maggie Barry says the birds will add to the 60 released into the Tasman valley earlier this month, significantly boosting the wild population. More>>

ALSO:

IHC Tribute: Colin Meads

"While Colin is best known for rugby, to us he is one of a small number of distinguished IHC New Zealand Life Members recognised for their significant support for people with intellectual disabilities," says IHC Chief Executive Ralph Jones. More>>

ALSO:

Howard Davis Review: Tilting at Turbines - The Trip to Spain

Steve Coogan and Rob Brydon have now both broken the Big Fifty barrier, which seems to have brought a whole new level of angst to their midlife adventures ... More>>

Review: A Rose By Any Other Name Would Smell As Sweet

The Royal New Zealand Ballet has accepted the challenge of this heart-touching tragedy and largely succeeded. More>>

ALSO:

NZ's First Male IAAF Gold: Tom Walsh's Historic Shot Put Victory

Although feeling very sore but with a great feeling Tom Walsh took his place as number one on the victory dais to receive his much deserved gold medal. More>>

ALSO:

Scoop Review Of Books: Q&A: Hard To Find Books

"Unfortunately we are in crisis and this friendly dinosaur faces extinction… Our only hope is to try and raise funds to buy the building and restore it to its glory, either fully funded or with a viable deposit." More>>

 
 
 
 
 
 

LATEST HEADLINES

  • CULTURE
  • HEALTH
  • EDUCATION
 
 
  • Wellington
  • Christchurch
  • Auckland