Posting in Design
A new type of light can kill superbugs in the air and on exposed surfaces. Experts expect the light technology to help ease up hospital infections.
Superbugs are a huge problem in hospitals, but scientists have been working on a number of ways to combat the spread of the potentially deadly pathogens. There's anti-pathogenic drugs to treat superbugs and a coating that can kill MRSA upon contact.
Now, scientists at the University of Strathclyde have shown that special light is enough to make the bacteria basically commit cell suicide. Clinical trials proved the HINS-light Environmental Decontamination System is effective in getting rid of bacterial pathogens in the hospital setting - at least the light system works better than traditional wipe down methods.
“The technology kills pathogens but is harmless to patients and staff, which means for the first time, hospitals can continuously disinfect wards and isolation rooms," Strathcylde professor John Anderson said in a statement.
“The system works by using a narrow spectrum of visible-light wavelengths to excite molecules contained within bacteria. This in turn produces highly reactive chemical species that are lethal to bacteria such as meticillin-resistant Staphylococcus aureus, or MRSA, and Clostridium difficile, known as C.diff," he added.
The light prevents the pathogens from being transmitted through the environment - which ultimately lessens the spread of the infection among patients.
As you'll notice in the picture, the light gives off a purple color. To make the lights appear more normal, the scientists designed the system with LED technology to off-set the violet color.
Related on SmartPlanet:
- War against superbugs: A coating that can kill MRSA upon contact
- Fight for life against superbugs
- Scientists can shut down a bug's CPU
- Researchers discover anti-pathogenic drugs to treat superbugs
Nov 15, 2010
There's a home version that does all singing and dancing by another company If anyone is interested. http://www.heavenfresh.ca/s.nl/sc.2/category.447/.f
OK this is nothing new. Most of these devices have one flaw, they only kill bacteria & viruses on the place they shine on. After this treatment the bacteria etc can grow back. A much more desirable strategy using UVC is to site it in a/c or ventilation systems. There are two approaches. 1. Passive UVC - this works because to save energy all buildings re-circulate up to 90% of the air, just like in aircraft cabins. This means that whatever you sneeze out is distributed on to all of the other building occupants and they contract infections. The is one big flaw in this approach because the sneeze has to be carried to the UVC for the kill to take place. So a better strategy to mitigate this exposure it to use Active UVC. 2. Active UVC works in a completely different way. Active UV creates a natural disinfectant (hydro-peroxide) that occurs naturally outside but not inside. This hydro-peroxide plasma is blown into the house or building and the disinfectant floats in the air. If you sneeze it will kill the vast majority of the virus or bacteria within 3ft. It has been tested against many pathogens, if you are seriously interested please go to http://www-e- co.uk.com/uvreme.htm for active UVC and http://e- co.uk.com/tbs.htm for a video on how passive UVC works.
http://www.photonics.com/Article.aspx?AID=45005 is another version of this article. A little more details on the light and its germ killing methods are explained. After I complain about someone else's misuse of the language, I had better get mine straight, hence the use of are instead of is. disinfecting instead of desinfecting, better instead of beter, mammals instead of mamals...
http://www.photonics.com/Article.aspx?AID=45005 is another version of this article. A little more details on the light and its germ killing methods is given.
At one time, our problem was disinfecting after TB patients. We used ultraviolet light as an adjunct to soap and water and sunshine. The habit was to run the light for 24 hours and indeed, after that period of time, nothing grew on our petri dishes, et al. Now, a room with a 24 hour down time will not be tolerated as the number of beds that can be built are limited by local law or habit and the expense of doing so. Thus beds have very little time between occupants. Now, if you really want to improve the infection rate in hospital; remove the nasty fake nails on staff or make them wear gloves thruout their day, not just on patient contact. Get the hair out of the staffs' faces and off everything they touch. They watch too much tv and believe that CSI investigators are dripping their own DNA over all crime scenes. It is a crime what passes for infection control in the average hospital. But the number one way to improve the infection rate is to hire enough housekeepers to get the rooms cleaned instead of the horizontal surfaces only. Yes, only. If they notice emesis (vomit) dried on something they will try to remove it but they sometimes "clean" 30 discharges in an 8 hour day. What would you get cleaned in that period of time? Also count in a 30 minute lunch and a 15 minute break. So you have 7 hours and 45 minutes to do 30 rooms plus running to the ER to mop up "spills." Oh yes, there are a lot of ways to kill germs. Adequate time and staff does an excellent job of decreasing infection rates. And is far less expensive.
Dumbed down-Ouch. Its a good article, Its good to see that there's a lot of people out there very Interested In this new technology. I'm glad someone of a high standing has brought this subject up to tell people who don't know about this new tech. Sorry I'm no Master in Chem Eng, But as an end user (Allergy sufferer) Any news whether It be "dumbed down" or scientifically explained is welcomed by me.
This is as dumbed down an article as any I have ever seen. Boonsri, you're a Masters in Chem Eng and you are letting our profession down :)
...that there will be a spectrum of damages done to the microbes in question. Some will be killed, some damaged "so that they cannot reproduce," and some will be damaged to a lesser extent. Therefore, evolution will continue among the survivors, and I think it's inevitable that sooner or later some will have developed an immunity of some kind to the light. Also, I wouldn't be too ready to conclude that humans are never harmed by such lights. The acknowledged mechanism is that the light destroys RNA inside the cell. If it does the same in human cells (and that destruction would have to be indiscriminate), then I see a clear risk of skin cancer. The reason they feel free to make the claim that it's safe, could simply be that they haven't made that link YET.
@Tinman57 The black light you are thinking about use UV-C and some UV-B. It can cause sunburns and eye problems. All UV are invisible. This technology use VISIBLE light specificaly tuned to affect some specific molecules inside the bacterias and turn those molecules into poison that kills the bacterias. The amount of poison produced is infinitesimal, way under the detection thressold, and won't persist long once the bacteria is dead. That light is harmless for us, even if it may be somewhat stressful to the eyes. @GuntherGump As you can recompose a white illumination, you can have that light continously on in most areas, including hallways, rooms and waiting rooms. It can be treated as an area and surfaces treatment. For peoples, it's even less intrusive than washing your hands. It can be looked upon the same way as the addition of tiny amounts of iodine in table salt to prevent some disorders. As that light don't affect humans, and any mamals, birds and reptiles, you don't have any problem from using it. It also probably don't affect most insects as ther DNA is protected under a chitinous exoskeleton. It could affect only the tinyest, colourless, insects whose chitin is so thin as to be effectively transparent. @darkstate Ozone is indeed great at desinfecting, but it does have some serious drawbacks. First and foremost, it's very iritating. You just can't use it where you have peoples who may have respiratory problems, or eye problem/infections. Then, it must be produced as it is used, and that production use a large amount of electricity and generate quite some heat. Great for treating places where there is nobody, or at water treatment plans where it does a Greatly beter job than chlorine.
Barbershops have been using this technology for years. It's called a "Black Light". And not the type that you buy to look at all your pretty posters. They use UV lights that kill bacteria and parasitic insects, and can cause blindness in people if looked at too long...
Barbershops have been using this technology for years. It's called a "Black Light". And not the type that you buy to look at all your pretty posters. They use UV lights that kill bacteria and parasidic insects, and can cause blindness in people if looked at too long...
Bed bugs can be destroyed with UV-C light as there RNA will be destroyed, It wont kill them on contact but the damage will stop them from reproducing. You can also get a plug in electronic mite controller that's quite effective, It sends out a sound wave that effects the critters reproductive and eating habit's . Die I tell you :P
Now if we could get this to work on bedbugs someone could make some good $ just from the Hotel/Motel industry alone! They spend a lot of money have rooms sprayed at least once a month!
Any home ozone sanitizer will kill E. Coli and staph. I heard recently that New york city water supply will have massive UV-C lamps to kill most water born contaminants, not all but most and the rest that survive will be unable to replicate due to damage o there RNA. See wiki for further info on that.
Hospital rooms and equipment are cleaned by trained staff and proven methods. Tests are routinely done to ensure the process is effective. The vectors for infection are from those that are less "germ" conscious; the patient themselves and their visitors. We can use the lights to disinfect the rooms, equipment, and the like. But, can we make visitors and the patients go through the light process? Soon to Come: If you're a government insured patient, example Medicare and Medicaid, you'll get the photo treatment and you won't get a choice in the matter. And, those two set the rules for everybody. Lastly, will hospitals mandate that visitors undergo the light treatment? And, will it violate somebody's assumed rights?
Great new technology that no doubt will be expanded on. Can it be made to work in water to destroy waterborn pathogens? Will it kill E. Coli? Can it be be made flexible, through the use of optical cables for example, so that MRSA et. al. can be destroyed in nooks-and-cranies?
I like the sound of that, I'll buy one if its as cheap as the UV-C. The lamp I have does stress not to look into the light as It will cause damage as sunburn etc, but I did buy it purely for my keyboard and mouse to sanitize them. The lamp also has a timer on it for 30 seconds maximum then turns off. As far as killing off other germs,you can buy a ozone hand sanitizer that also doubles up as a fruit and fish cleaner that kills bacteria, you just fill the bowl with water let it bubble then eat as usual minus the germs.
Ultraviolet-C light kills germs, but it also ionizes molecules in our skin, leading to sunburn or even cancer. You put on your goggles and expose surfaces with the light for a minute or so, then turn it off to reduce the patient's and your own exposure. These new lights use visible wavelengths that are harmless to us, but tuned to certain bonds vital to certain resistant bacteria. The lights can be left on non-stop, and any of those bacteria that land on an illuminated surface or float past them on the breeze are toasted. It sounds like other colors of LED can be mixed with them to give a whiter balance; I suppose the bactericidal colors could be left on dimly all night as a night light.
Doesn't UV-C he same trick? I use a UV-C wand that can and does kill all bacteria/viruses etc by destroying there rna so they can't multiply, This same tech is used in hospitals worldwide as far as know. It also kills dust mites for people with allergies this is a great help. When i say kill I mean the critters survive for a short while but CANNOT replicate as there RNA is destroyed. It only takes 30 seconds or so of light on them and the damage is done.