LONDON, Mar 11: Antibiotic resistance poses a catastrophic threat to medicine and could mean patients having minor surgery risk dying from infections that can no longer be treated, Britain’s top health official said today. Sally Davies, the chief medical officer for England, said global action is needed to fight antibiotic, or antimicrobial, resistance and fill a drug “discovery void” by researching and developing new medicines to treat emerging, mutating infections. (agencies)