An article last week in the journal Lancet Infectious Diseases documented a new and dangerous gene that could allow any bacteria to become a superbug that's resistant to antibiotics and almost impossible to treat. 37 people in the U.K. have been identified as carrying bacteria with the gene, called NDM-1, after visiting India and other parts of Asia for medical tourism. Medical personnel are worried that a new strain of superbug may threaten health worldwide. Why are new bugs so resistant to antibiotics? And what might a world look like as superbugs grow stronger? 

Scientists have found a superbug that is resistant to most antibiotics. So far it is widespread in India, and it could soon appear worldwide. In the journal, Lancet Infectious Diseases, doctors reported finding a new gene, NDM-1, which alters bacteria, making it resistant to nearly all known antibiotics. This is a particular risk for people on "health tourism" trips seeking cheaper medical care in India and Pakistan.