The World Health Organisation (WHO) estimates that up to half a million people per year develop multidrug-resistant tuberculosis, presenting an increasing threat to global health, while cases of particularly resistant bacteria strains have increased 600-fold in the U.K. between 2003 and 2015. The rise of multidrug-resistant bacteria has been attributed to the overuse of antibiotics in medicine and farming, but a new study, published in May 2017 in the