Bacteria	Clindamycin	Cefoxitin	Levofloxacin/moxifloxacin	Imipenem/meropenem Ertapenem	Pip-tazo/ticar-clav	Metronidazole	Tigecycline
Bacteroides fragilis	+/++	++	+/+++*	++++	++++	++++	++++
Bacteroides fragilis group	+	++	+	++++	+++	++++	++++
Fusobacterium species	+++	++++	+/++	++++	++++	++++	++++
Peptostreptococcus species	++++	++++	+++	++++	++++	+	++++
Clostridium perfringens	+++	++++	+++	++++	++++	+++	+++
Clostridium difficile	–/+	–/+	++	+	++	+++	++++
Lactobacillus species	+	+	+/++	–/+	++	+	+
Veillonella species	++++	+	+	+++	++	+++	+

^*Moxifloxacin has good activity against Bacteroides fragilis. – Poor activity; + Limited activity and/or resistance ≥15%; ++ Moderate to good activity and/or resistance 10% to 14%; +++ Very good activity and/or resistance 5% to 9%; ++++ Excellent activity and/or resistance <5%; Pip-tazo Pipercillin-tazobactam; Ticar-clav Ticarcillin-clavulanate. Data adapted from references 85,86,256–258