An outbreak of the parasite cryptosporidium has impacted the water supply in the Brixham area in Devon, but what actually is it and how dangerous is it?

Residents have been told to boil their tap water until further notice, with it being predicted that the issue will last for at least another week.

Investigations are taking place at the Hillhead Reservoir between Brixham and Dartmouth, with around 40,000 residents using this source for their water supply.

BBC News reports that 22 cases of cryptosporidiosis had been confirmed in Brixham and up to 100 people had reported symptoms to their GP in the last week.

Eden Park Primary School has had to close today (Thursday, May 16) as a consequence of it and many people have been reported as panic-buying bottled water.

What is cryptosporidium?

According to the Government website, cryptosporidium is a parasite "that causes an illness or disease called cryptosporidiosis".

It adds: "It can be found in the intestines and faeces of infected humans and animals, and may contaminate lakes, streams and rivers, swimming pools, untreated or poorly treated water, food, especially raw milk and fresh produce, and objects such as farm gates and outdoor boots and clothing."

Cryptosporidiosis can be a serious illness in people who have immune systems that are not working properly.

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What are the symptoms of cryptosporidiosis?

Symptoms of cryptosporidiosis include:

  • profuse watery diarrhoea
  • stomach pains
  • nausea or vomiting
  • low-grade fever
  • loss of appetite

Symptoms usually last for about two weeks but can be longer, especially in people with weak immune systems.

The Government website adds: "During the illness, you might think that you are getting better and have shaken off the infection but then it returns a couple of days later before you fully recover."