 In March 2007 , the FDA reported the results of a randomized , open @-@ label , phase III clinical trial comparing linezolid to vancomycin in the treatment of catheter @-@ related bloodstream infections . Patients treated with vancomycin could be switched to <unk> or <unk> if the bacteria that caused their infection was found to be susceptible , and patients in both groups ( linezolid and vancomycin ) could receive specific treatment against Gram @-@ negative bacteria if necessary . The study itself was published in January 2009 . 
