Bacteroides fragilis

Background

• Gram negative rod that is part of normal flora of the colon

Antibiotic Sensitivities

Category	Antibiotic	Sensitivity
Penicillins	Penicillin G	R
	Penicillin V	I
Anti-Staphylocccal Penicillins	Methicillin	R
	Nafcillin/Oxacillin	R
	Cloxacillin/Diclox.	R
Amino-Penicillins	AMP/Amox	R
	Amox-Clav	S
	AMP-Sulb	S
Anti-Pseudomonal Penicillins	Ticarcillin	R
	Ticar-Clav	S
	Pip-Tazo	S
	Piperacillin	R
Carbapenems	Doripenem	S
	Ertapenem	S
	Imipenem	S
	Meropenem	S
	Aztreonam	R
Fluroquinolones	Ciprofloxacin	R
	Ofloxacin	R
	Pefloxacin	R
	Levofloxacin	R
	Moxifloxacin	I
	Gemifloxacin	R
	Gatifloxacin	I
1st G Cephalo	Cefazolin	R
2nd G. Cephalo	Cefotetan	I
	Cefoxitin	S
	Cefuroxime	R
3rd/4th G. Cephalo	Cefotaxime	R
	Cefizoxime	I
	CefTRIAXone	R
	Ceftaroline	R
	CefTAZidime	R
	Cefepime	R
Oral 1st G. Cephalo	Cefadroxil	X1
	Cephalexin	R
Oral 2nd G. Cephalo	Cefaclor/Loracarbef	R
	Cefproxil	R
	Cefuroxime axetil	R
Oral 3rd G. Cephalo	Cefixime	R
	Ceftibuten	R
	Cefpodox/Cefdinir/Cefditoren	X1
Aminoglycosides	Gentamicin	R
	Tobramycin	R
	Amikacin	R
	Chloramphenicol	X2
	Clindamycin	I
Macrolides	Erythromycin	R
	Azithromycin	R
	Clarithromycin	R
Ketolide	Telithromycin	X1
Tetracyclines	Doxycycline	I
	Minocycline	I
Glycylcycline	Tigecycline	S
	Daptomycin	X1
Glyco/Lipoclycopeptides	Vancomycin	R
	Teicoplanin	X1
	Telavancin	R
	Fusidic Acid	X1
	Trimethoprim	X2
	TMP-SMX	R
Urinary Agents	Nitrofurantoin	X1
	Fosfomycin	X1
Other	Rifampin	X1
	Metronidazole	S
	Quinupristin dalfoppristin	X1
	Linezolid	I
	Colistimethate	X1

Key

• S susceptible/sensitive (usually)
• I intermediate (variably susceptible/resistant)
• R resistant (or not effective clinically)
• S+ synergistic with cell wall antibiotics
• U sensitive for UTI only (non systemic infection)
• X1 no data
• X2 active in vitro, but not used clinically
• X3 active in vitro, but not clinically effective for Group A strep pharyngitis or infections due to E. faecalis
• X4 active in vitro, but not clinically effective for strep pneumonia

See Also

• Microbiology (Main)