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


Selwyn gastro outbreak being investigated

August 23, 2012

Selwyn gastro outbreak being investigated

The Canterbury District Health Board is investigating whether an outbreak of gastroenteritis at Darfield and Hororata was from contaminated water supplies.

The investigations follow 19 confirmed or suspected gastroenteritis cases in the region, one of which has resulted in hospitalisation.

Dr Alistair Humphrey, Canterbury Medical Officer of Health says many more are expected to have had symptoms as not all those suffering from gastroenteritis will have visited their General Practice Team.

“While Selwyn District Council testing has shown the water in Darfield and the Selwyn Rural Water Supply’s Hororata branch is now safe to drink, it is possible that the gastroenteritis outbreak was caused by problems with water supplies late last week,” Dr Humphrey says.

“The notifications coincide with water supply issues the region has been experiencing. In June the council reverted to its river supply because of problems with its deep bore system. The heavy rainfall over the last few weeks has put additional pressure on water supplies.”

The CDHB is carrying out both clinical and public health investigations to determine the source of the outbreak, he says.

“New Zealand’s drinking water standards ensure there are several barriers between potential infection and water related illness. Infection usually occurs when more than one of these barriers breaks down, and there is rarely a single cause.

“CDHB’s Community and Public Health team is working closely with the Selwyn District Council so its community can be confident of the quality of their drinking water.”

Dr Humphrey says water storage tanks on residential properties may still contain contaminated water.

“The safest approach for getting rid of potential contamination in storage tanks is to drain them; alternatively residents with very large tanks can use bleach to remove potential contamination as described in the guidelines on the Selwyn District Council website.”

The guidelines can be found at:


© Scoop Media

Culture Headlines | Health Headlines | Education Headlines


Howard Davis: Emerald Fennell's Promising Young Woman'

The Guardian needed not one, but three reviews to do justice to Fennell's unsettling approach, which indicates exactly how ambiguous and controversial its message really is. More>>

Howard Davis: Jill Trevelyan's Rita Angus

Although Angus has become one of Aotearoa’s best-loved painters, the story of her life remained little known and poorly understood before Jill Trevelyan's acclaimed and revelatory biography, which won the Non Fiction Award at the Montana New Zealand Book Awards in 2009, and has now been republished by Te Papa press. More>>

Howard Davis: The Back of the Painting

Painting conservators are the forensic pathologists of the art world. While they cannot bring their subjects back to life, they do provide fascinating insights into the precise circumstances of a painting's creation, its material authenticity, and constructive methodology. More>>

Howard Davis: Black Panthers on the Prowl

A passionate and gripping political drama from Shaka King, this is an informative and instructive tale of human frailty that centers around the charismatic Chicago Black Panther leader Fred Hampton, who was murdered at the age of twenty-one during a police raid. More>>

Howard Davis: Controlling the High Ground

Stephen Johnson's raw and angry film not only poses important questions with scrupulous authenticity, but also provides a timely reminder of the genocidal consequences of casual bigotry and xenophobia. More>>

Howard Davis: Dryzabone - Robert Conolly's The Dry

After the terrible devastation caused by last year’s bushfires, which prompted hundreds of Australians to shelter in the ocean to escape incineration and destroyed uncountable amounts of wildlife, The Dry has been released during a totally different kind of dry spell. More>>

Howard Davis: Hit the Road, Jack - Chloé Zhao's Nomadland

Nomadland is perhaps the ultimately 'road' movie as it follows a group of dispossessed and disenfranchised vagabonds who find a form of communal refuge in camp sites and trailer parks after the economic contraction of 2008. More>>



  • Wellington
  • Christchurch
  • Auckland