The first case of an infection that resists the antibiotic of last resort - colistin - has been detected in the US. The 48-year old woman from Pennsylvania recovered and the infection was vulnerable to other antibiotics. However, colistin is hugely symbolic as it is used when other drugs fail and officials warned the world was now reaching "the end of the road" for antibiotics. Colistin resistance was first discovered in China at the end of 2015 . The study sparked concern around the world, and intensive testing rapidly discovered bugs that can resist colistin in Europe and Asia. Now data from the US has identified the first case in a patient, who had a urinary-tract infection, as well as colistin-resistant bacteria in farm animals and meat on supermarket shelves. It is not clear where the infection came from as the patient had not travelled recently and colistin is not widely used in the US. Bleak future The DNA that gives bacteria resistance to col...