<prompt> Drugs that can be used to treat infection caused by bacteroides fragilis are all exceptMetronidazoleTrovafloxacinVancomycinAmikacin  <response>: Ref KDT 6e p719. 720 Drugs used to treat anaerobic organisms include Metronidazole Moxifloxacin and Trovafloxacin Vancomycin Clindamycin Aminogycosides are ineffective against anaerobic organisms 