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Brain-Eating Amoeba Scoffs At Chlorine In Water Pipes

An anonymous reader writes: The Naegleria fowleri amoeba typically feeds on bacteria in water and soil. Human digestive systems have no problem killing it, but inhaling water that carries the amoeba gives it the opportunity to work its way into the brain after it sneaks through the nasal mucus. It happens rarely, but 97% of people whose brains start swelling because of this amoeba end up dying. Like most microorganisms, N. fowleri can be neutralized with concentrated chlorine. However, the systems we use to deliver tap water aren't so clean. Researchers found that N. fowleri can easily survive for 24 hours when it's mixed with the types of biofilm that tend to reside in water pipes. Increasing chlorine levels isn't a good option, since its reaction with these biofilms can generate carcinogens.

24 of 151 comments (clear)

  1. Re: Article by Anonymous Coward · · Score: 2, Funny

    Tonight at 10 - Everything kills you.

  2. It is horrific, however... by Junta · · Score: 5, Interesting

    " 97% of people whose brains start swelling"

    So basically, if you start showing the signs, you are probably gone. However, IIRC, they found a fairly large portion of the population actually has antibodies for N. fowleri, indicating that getting infected may not be that uncommon, just that most infected are asymptomatic (or maybe mistook it for some more trivial ailment).

    It would be interesting to also know the percentage of exposed who do not experience brain swelling...

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    1. Re:It is horrific, however... by Anonymous Coward · · Score: 5, Funny

      Let's put it this way. Before his infection by N. fowleri, the APK troll was a perfectly well adjusted heterosexual male with normal bodily desires, and a healthy, can-do attitude towards life. After the infection, he became a host file-obsessed lunatic who can think of nothing else.

      Tragic, really.

    2. Re:It is horrific, however... by EvilSS · · Score: 2

      Let's put it this way. Before his infection by N. fowleri, the APK troll was a perfectly well adjusted heterosexual male with normal bodily desires, and a healthy, can-do attitude towards life. After the infection, he became a host file-obsessed lunatic who can think of nothing else.

      Tragic, really.

      The APK troll is a bot.

      Well he is NOW. Before N. Flowleri he was as human as you or me.

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    3. Re:It is horrific, however... by davester666 · · Score: 2

      It also made him gay.

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  3. Neti Pots by Anonymous Coward · · Score: 5, Insightful

    Guess I should boil that water first.

    1. Re:Neti Pots by Parafilmus · · Score: 5, Informative

      Guess I should boil that water first.

      Definitely

    2. Re:Neti Pots by EvilSS · · Score: 2

      Purified and distilled are two separate things. Purified really just means filtered (paper filter, reverse osmosis, etc).

      Not always. At least not anymore apparently. I buy distilled water regularly and recently it changed to "purified" but the label still states that it was distilled from municipal water sources, just like before. Not sure why the switch in marketing but you're right, it CAN mean other thing so not really happy about it.

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  4. Re: Why is this being discussed? by Anonymous Coward · · Score: 5, Interesting

    For people that use things like neti pots. They provide a direct route past the blood-brain barrier.

  5. Is it a problem? by Pollux · · Score: 5, Interesting

    N. fowleri can easily survive for 24 hours

    But is it surviving? Does it even exist in our water system at present? I only know about this amoeba, because it became an issue up here in Minnesota when a boy swimming in Lake Minnewaska was believed to have contracted the disease and passed away. (Although, it was later determined that he died not from an amoeba but rather from bacterial meningitis.) But, as this was happening, it was shared that there's been only 35 confirmed deaths from amoebas over the last 10 years. Do we really need to concern and trouble ourselves over something killing 3.5 humans a year?

    1. Re:Is it a problem? by myrdos2 · · Score: 2

      That article also says: Someone can get infected with PAM from swimming in warm fresh water, such as a lake or river. So, there have possibly been zero deaths from chlorinated water. So it's more like being concerned over something that kills no people per year.

    2. Re:Is it a problem? by jbengt · · Score: 2

      This particular nasty amoeba isn't the issue. It's the bio-film that it hides in, which is a well-known problem that can hide a lot of nasties in your domestic water system, as well as promoting corrosion in all sorts of piping systems.

  6. Clorine isn't the solution by Archangel+Michael · · Score: 4, Interesting

    https://en.wikipedia.org/wiki/...

    Better than Chlorine.

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    1. Re:Clorine isn't the solution by TeknoHog · · Score: 3

      Chlorine and ozone aren't mutually exclusive in water treatment. AFAIK, ozone/oxygen is used at water treatment plants to kill germs, but the effect won't last indefinitely. Chlorine is added to protect against anything the water might catch on the way to end users.

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    2. Re:Clorine isn't the solution by Anonymous Coward · · Score: 4, Insightful

      Whenever somebody asks a question starting "Why don't they...." - the answer is always "money". (R. Heinlein)

      That's pretty optimistic. In my experience at least half the time the answer is "because that idea doesn't actually work".

  7. Re:Why is this being discussed? by GrumpySteen · · Score: 2

    Hasn't every single case in USA been due to someone swimming in a open body of water?

    No.

    Why would we care about them surviving in drinking water?

    Because it's also the water that you shower in, swim in, get sprayed with if someone uses a squirt gun on you, get splashed with when you wash a dish by hand and so forth. Most people don't want to constantly be exposed to a parasite that can kill them.

  8. Nasal rinsing ... use some care by khb · · Score: 4, Informative

    Using a Neti pot, NealMed or homebrew .... it seems still sensible to either:

    1) Boil water, and hold at temp for several minutes (a "hot pot" e.g. http://www.zojirushi.com/app/p... typically holds the water at a boil for 4min) or
    2) UV sterialize http://www.steripen.com/advent... as an example

    While one can use distilled water, often it sits around potentially growing something (but probably nothing brain eating) so making it fresh has advantages.

    Yes, these pests are rare; but the results dire enough one should take reasonable care before putting water up one's nose these days.

    1. Re:Nasal rinsing ... use some care by Anonymous Coward · · Score: 4, Funny

      1b. Let the water cool for a while before using the Neti pot.

    2. Re:Nasal rinsing ... use some care by Pulzar · · Score: 3, Informative

      I guess that means that you shouldn't go swimming in fresh water? Even a chlorinated pool could contain this parasite for 24 hours if there is that same film inside the pool's plumbing.

      The pools are chlorinated to a much higher level, because you don't need to keep the water drinkable.

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  9. Why not infect Naegleria fowleri with Mimivirus? by JoeDuncan · · Score: 5, Interesting

    According to this 2008 biomed paper: http://www.biomedcentral.com/1..., Naegleria fowleri is likely vulnerable to Mimivirus (possibly Mamavirus too?) infection.

    Given that Naegleria fowleri is close to 100% fatal, why not try infecting the Naegleria fowleri infection with Mimivirus?

    Mimivirus is only speciously associated with Pneumonia in humans, and Pneumonia has a much better survivability rate. Worst case scenario it does nothing and the patient dies (which was going to happen anyways), best case scenario the Mimivirus kills Naegleria fowleri and the patient survives with no pathology. Middle road scenario, the Mimivirus kills Naegleria fowleri, the patient survives but has Pneumonia.

    Personally, I would choose having a bout of Pneumonia over having my brain eaten by an amoeba any day.

  10. Re:Why is this being discussed? by morgauxo · · Score: 4, Funny

    "There are many ways to get water up your nose such as... laughing at posts on slashdot while drinking,..."

    Those are going to be some poor, hungry Amoebas!

  11. Re:Why is this being discussed? by PPH · · Score: 2

    laughing at posts on slashdot while drinking

    I don't think Naegleria fowleri can survive in Mountain Dew (nectar of the 'tards).

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  12. Re:So chlorine is not a good option? by Coren22 · · Score: 2

    Not sticking tap water up your nose?

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  13. Re:If you can't beat em... by mjwx · · Score: 5, Funny

    I used to play in a garage band called Brain Eating Amoebas.

    I was once in a band called 1023 Megabytes, we never made it to our first gig.

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