Table 2.

Association Between Antibiotic Class Administration in the Prior Month and Campylobacter Detection in Surveillance Stool Samples

Antibiotic Class	Antibiotic Courses, No.	Risk Ratio (95% CI)
Macrolide	2820	0.68 (.63–.74)
Cephalosporin	3534	0.80 (.76–.85)
Fluoroquinolone	692	0.89 (.78–1.02)
Penicillin	6577	0.92 (.88–.96)
Metronidazole	2289	0.95 (.87–1.02)
Other/unknown	2761	0.95 (.89–1.02)
Sulfonamide	1560	1.02 (.94–1.10)
Tetracycline	42	1.03 (.58–1.83)

Abbreviation: CI, confidence interval.