Antibiotic susceptibility of Riemerella anatipestifer isolated from ducks suffering with septicemia in Viet Nam

Abstract

The objective of this study aimed at evaluating the antibiotic susceptibility of 69 Riemerella
anatipestifer (RA) strains isolated from the septicemia ducks. The studied result showed that the RA
strains were highly susceptible with amoxicillin/clavulanic acid, imipenem and florfenicol with the
susceptible rate 100%, 100% and 91.3%, respectively. The majority of the isolates were resistant to
nalidixic acid (89.9%), streptomycin (75.4%) and norfloxacin (72.5%). Besides that, some antibiotic
resistance genes of RA isolates were detected by using PCR method. As a result, floR, sulII and
aac(6')-Ib-cr genes were detected in 4, 3 and 2 isolates, respectively