Researchers at the University of California, Los Angeles, have developed a device that, attached to a mobile phone, can detect small amounts of E. coli in liquid samples.
Outbreaks of E. coli pose a huge threat to health.
E. coli is transmitted to humans through consumption of contaminated foods, such as raw or undercooked ground meat products, raw milk and contaminated raw vegetables.
As existing detection devices are often expensive and complex, an accurate and efficient detection device could be extremely popular.
There are more than five billion mobile phones on the planet and 70 percent of these are in the developing world, the Mail said.