Table 4. Most common antimicrobial resistance patterns of Campylobacter isolates (N = 141) from chicken cecal samples from small poultry flocks in Ontario between October 2015 and September 2017.

Antimicrobial resistance patternA	Number of antimicrobial classes in pattern (multidrug resistant)B	n (%)C
TET	1 (no)	77 (54.61)
AZT-CLI-ERY-TEL	3 (yes)	6 (4.26)
CIP-NAL	1 (no)	5 (3.55)
CIP-NAL-TET	2 (no)	3 (2.13)

^AResistance to nine selected antimicrobials (including gentamicin and florfenicol) as determined by a broth microdilution technique. AZT = azithromycin; CIP = ciprofloxacin; CLI = clindamycin; ERY = erythromycin; NAL = nalidixic acid; TEL = telithromycin; TET = tetracycline.

^BAn isolate was defined as multidrug resistant if it was non-susceptible to one or more antimicrobials in ≥ 3 different antimicrobial classes (Ketolides: TEL; Lincosamides: CLI; Macrolides: AZT, ERY; Quinolones: CIP, NAL; Tetracyclines: TET).

^CNumber and percentage of isolates with each antimicrobial resistance pattern. Only patterns with ≥ 3 isolates are shown.