Table 1.

Geographical distribution of antimicrobial resistance patterns per U.S. region, 2017-2018

Antibiotic	All isolates n=345	West n=108	Central n=86	East n=151	P-value
Amoxicillin	6.4% (22)	8.3% (9)	5.8% (5)	5.3% (8)	0.6
Clarithromycin	17.4% (60)	11.1% (12)	15.1% (13)	23.2% (35)	0.03
Metronidazole	43.6% (150)*	35.5% (38)*	43.0% (37)	49.7% (75)	0.08
Rifabutin	0.0% (0)	0.0% (0)	0.0% (0)	0.0% (0)	ND
	Limited Analysis n=71	n=19	n=19	n=33
Tetracycline	2.8% (2)	5.3% (1)	5.3% (1)	0 (0.0%)	0.3
Levofloxacin	57.8% (41)	57.8% (11)	68.4% (13)	17 (51.5%)	0.5

^*Metronidazole susceptibilities were available for 107 isolates from the West region and 344 isolates in total.