A 63 year old female developed
diarrhoea shortly after being treated with antibiotics for community acquired
pneumonia. Stools were positive for Clostridium difficile toxin and she was
treated with oral metronidazole for 2 weeks. She made a satisfactory recovery.
2 weeks later she presents with
diarrhoea and stools are once more positive for Clostridium difficile toxin
In this patient which one of the
following would you use as treatment?