In vitro antibiotic susceptibility patterns of Ornithobacterium rhinotracheale from commercial chickens in Argentina

Abstract

Ornithobacterium rhinotracheale is a bacterial pathogen of the poultry industry causing severe economic losses worldwide. Fifteen β-hemolytic and 23 non-hemolytic O. rhinotracheale isolates from commercial broiler and broiler breeder chicken flocks were obtained and their sensitivity to ampicillin, trimethoprim-sulfamethoxazole, gentamicin, enrofloxacin, erythromycin, florfenicol, doxycycline and fosfomycin tested by a disk diffusion method. All isolates were non-susceptible to gentamicin. Most were non-susceptible to enrofloxacin, erythromycin, trimethoprim-sulfamethoxazole, doxycycline and fosfomycin, while most were susceptible to ampicillin and florfenicol. Susceptibility to ampicillin a..