Bad bacteria we can meet anywhere. We do not even know if the food consumed may be contaminated with E. coli bacteria. So small, nuisance bacteria digestive tract would not be seen with the naked eye.
What if your phone could detect the quality of the rest of the food in your fridge is safe to eat. Or your phone can detect harmful bacteria. This is not science fiction anymore, this kind of cell phone technology has been created.
The team of scientists have created a device that can be attached to the phone and can detect small amounts of E.coli bacteria in liquid samples. E.coli outbreak poses a threat to health, especially in developing countries.
According to the World Health Organization (WHO), most E. coli are harmless, but there are some types that are dangerous, such as enterohaemorrhagic E. coli (EHEC) which can cause severe food poisoning.
E. coli is transmitted to humans primarily through consumption of contaminated food products such as raw or undercooked meat, raw milk and raw vegetables, and sprouts were contaminated.
Currently there E.coli detector appreciated quite expensive and difficult to use. The team of scientists looked at the presence of the accurate and efficient detection can certainly become very popular. And they chose to apply mobile technology because there are more than five billion mobile phones on the planet, and 70 percent of them in developing countries.
Hongying Zhu and colleagues at the University of California, Los Angeles, developed a device that can take advantage of mobile technology. Zhu said that the sensing device platform based phones will be very useful to bring advanced technology to the poor and remote locations, where the phone has a micro-analysis technology to detect bacteria.
This device has a way of working that is similar to a fluorescence microscope, pumping the sample into a series of small tubes containing E. coli antibodies.
Then this tool measures the existence of quantum dots (tiny fragments of semiconductors) are placed around them with a camera phone and an extra lens.
The device can utilize mobile technology consists of a capillary tube with LED (Light Emitting Diode) lights on both ends. E.coli Antibodies are on the side of the capillary and will catch any E.coli present in the liquid sample.
Secondary antibody and quantum dots were then added in the capillaries, and this will bind E.coli trapped. Then catch E.coli by squeezing the complex. LED lights stimulate the quantum dots, causing them to emit fluorescent light.
Light emission was later captured by a camera phone as an image of the capillary were taken about – about once per second.
The team tested the device with water and milk samples, and proved capable of selectively detecting E.coli low concentration. E.coli can still be detected even though other species of bacteria are also present.
With this tool you can easily detect water or other liquid food from the presence of the bacteria, so that you can maintain the health of the family that cost almost priceless.
In the future, this tool will be developed for detecting a variety of other harmful micro-organisms to be more easily carried and used by almost all the mobile phone users.