What is cryptosporidium? The diarrhoea-causing parasite found in Devon drinking water
An outbreak of a waterborne disease in Devon has prompted urgent warnings for residents to boil their tap water.
At least 22 cases of cryptosporidiosis disease have been confirmed in and around the town of Brixham in South West England.
But what is the parasite that is making people sick, what are the symptoms of being infected with it and how serious can it be?
What is cryptosporidiosis disease?
Cryptosporidiosis is the disease caused by the parasite cryptosporidium.
Often shortened to crypto, infections can be caused by drinking contaminated water or swallowing contaminated water in swimming pools or streams.
It can also be acquired through contact with the faeces of infected animals or humans.
What are the symptoms?
The symptoms of cryptosporidiosis include:
• profuse watery diarrhoea
• stomach pains
• nausea or vomiting
• low-grade fever
• loss of appetite
How long does it last?
Most people develop symptoms within one to 12 days of picking up the parasite.
Symptoms usually last for about two weeks, but can last up to six weeks or longer when the immune system is not working properly.
During the illness, you might think you are getting better but the illness returns a couple of days later before you fully recover.
How serious is it?
Most people recover, but in people with severely weakened immune systems it can cause severe disease and can be fatal.
Serious cases and death used to be more common, according to Paul Hunter, professor in medicine at the University of East Anglia (UEA).
This is because before effective antiretroviral treatments were introduced for HIV/AIDS, people living with these illnesses would not recover if they picked up cryptosporidiosis.
Who is most at risk of serious illness?
People with weak immune systems are at greater risk of serious illness. This includes:
• people on some immunosuppressive drugs, for example cancer or transplant patients
• people with untreated HIV/AIDS
• malnourished children
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Residents ‘worried’ over water parasite
Does it need treatment?
There is no specific treatment for cryptosporidiosis.
It important to drink plenty of fluids as diarrhoea or vomiting can lead to dehydration, according to advice from the UK Health Security Agency (UKHSA).
You might also want to talk to a pharmacist about oral rehydration sachets to help replace the sugar, salts and minerals the body has lost.
Dr Lincoln Sargeant, Torbay’s Director of Public Health, said anyone with “severe symptoms like bloody diarrhoea” should contact NHS 111 or their GP.
Severe cases may require hospital treatment.
How do you know if you have crypto?
The symptoms of crypto are similar to other stomach bugs, so the only way to know for sure if you have it is for your doctor to send a sample of your faeces to be tested in a laboratory.
Read more:
Water disease outbreak may last a week, expert says
Sickness outbreak forces farm to cancel animal cuddling
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How can you stop the illness spreading?
If you are ill, stay away from nursery, school or work while you have symptoms, and for at least 48 hours after they stop.
You should also avoid swimming for two weeks after being unwell.
You should not prepare food for anyone else until 48 hours after diarrhoea has stopped.
Make sure you’re using good handwashing practices too, washing your hands thoroughly when handling food and after using the toilet.
The UKHSA also advises washing bedding and towels on the hottest possible cycle.
The crash involving a cargo ship and oil tanker off the East Yorkshire coast is bad news for the sea, fish and air in the area. What we don’t know yet is quite how bad it will be.
That depends on a few things – but the speed of the collision, clouds of filthy black smoke from the fires and the leaked fuel are certainly worrying.
Firstly, it matters what was on board those two massive vessels.
Follow live: Jet fuel spilling into sea after tanker collision
Analytics firm Vortexa estimates the 183m-long tanker was carrying about 130,000 barrels of jet fuel (kerosene), which is now leaking into the sea.
Jet fuel is not as sticky or viscous as heavier types of oil, thankfully, so it’s less likely to clog the feathers and fur of birds and seals. It can also be broken down by natural bacteria.
But it can still poison fish and kill animals and plants on the shoreline if it makes its way into the soil there.
The Marine Conservation Society has pointed out the site in the Humber estuary is close to some protected areas and is important for seabirds and harbour porpoises.
And both ships will have been powered by a dirtier, heavier kind of oil – likely marine gas oil or heavy fuel oil, though we don’t know the details yet.
Heavy fuel oil is nasty stuff.
Pic: Bartek Smialek/PA
Cheap, thick and tar-like, it can smother animals and is very dangerous if they consume it, and is extremely difficult to clean up. Let’s hope this isn’t creeping around the North Sea already.
We don’t know how much of either the jet fuel or the oil powering the ships has leaked, or how much will be burned off in the violent fires – which themselves are ploughing black smoke and filthy air pollution into the surrounding atmosphere.
And we don’t know for sure what was on the Solong cargo ship and if, or what, will go into the sea.
Cargo ship ‘had sodium cyanide on board’
It was carrying 15 containers of sodium cyanide among other cargo, according to a report from maritime data provider Lloyd’s List Intelligence.
The container vessel was also transporting an unknown quantity of alcohol, said the casualty report – an assessment of incidents at sea – citing a message from the local coastguard.
Plastic takes hundreds of years to break down, and potentially can choke or trap animals.
Many of us have seen that uncomfortable viral video of a turtle having a straw yanked out of its nose. Previous accidents on cargo ships have seen plastic Lego pieces wash up in Cornwall 25 years later.
Read more:
How UK North Sea platforms dump gas
Secondly, the impact depends on the sea and weather conditions around it.
Things like the wind and currents affect how an oil spill spreads in the sea. Scientists can draw up computer models to simulate how the oil could behave.
Thirdly, it matters how quickly this is all tackled and then cleaned up, if necessary, and if it can be.
Usually the slower the response, the worse the impact.
The coastguard has said the incident “remains ongoing” and it has started assessing the “likely counter pollution response” that will be required.
Such a response might need the help of numerous public bodies: the government environment department, the transport department, the Environment Agency and the Maritime and Coastguard Agency.
So for now the best we can hope for – aside from the welfare of the people involved – is that not all the oil is spilled or burnt, that conditions are calm and that rescuers and those cleaning up can work swiftly.
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