In a study out today at a big infectious disease conference, it compared its best selling antibiotic Zyvox to the older gold-standard drug vancomycin in patients with hospital-acquired pneumonia.

FORBES: Pfizer Fights Deadly Bacteria And Wins

Eighty-seven percent of the patients given Vicuron's drug responded, compared with 53% of those given vancomycin.

FORBES: Building A Better Bacteria Killer

Thirteen percent of those on the Optimer drug had the infection return, compared with 24 percent of those on vancomycin.

FORBES: Optimer Gets NEJM Power

The injectable medicine, for hospital-acquired infections, would be given once per week, compared with twice per day for mainstay vancomycin.

FORBES: Pfizer Plays A Guessing Game

She was treated with the most powerful antibiotics available, including vancomycin - currently the last line of resistance against the bacteria.

BBC: Superbug kills Hong Kong woman