NDM-1 can exist inside different bacteria, like E.coli, and it makes them resistant to one of the most powerful groups of antibiotics - carbapenems. These are generally reserved for use in emergencies and to combat hard-to-treat infections caused by other multi-resistant bacteria. And experts fear NDM-1 could now jump to other strains of bacteria that are already resistant to many other antibiotics. Ultimately, this could produce dangerous infections that would spread rapidly from person to person and be almost impossible to treat. At least one of the NDM-1 infections the researchers analysed was resistant to all known antibiotics. Similar infections have been seen in the US, Canada, Australia and the Netherlands and international researchers say that NDM-1 could become a major global health problem.