Antibiotic Susceptibility of Bacterial Infections in Arizona Companion Animal Species from January 2015 to December 2016

Abstract

Antibiotic resistance is a problem of growing importance in veterinary medicine. In order to ensure that antibiotics are used appropriately, antibiograms are generated to monitor bacterial susceptibility to antibiotics. The computer program Biomic was used to generate antibiograms for bacterial isolates from canine, feline, and equine samples sent to the Arizona Veterinary Diagnostic Laboratory between January 1st, 2015 and December 31st, 2016. The most common specimen types were urine (n=125), ear cultures (n=92), wounds (n=63), and skin cultures (n=30) for canines, uterine cultures (n=44) and wounds (n=41) for equines, and urine (n=16) and wounds (n=17) from felines. Of the canine isolates, the most common urine isolate E. coli was most susceptible to amikacin and chloramphenicol (92%), the most common ear isolate P. aeruginosa was most susceptible to amikacin (74%), the most common skin isolate Staphylococcus coagulase-negative was most susceptible to marbofloxacin, amikacin, amoxicillin-clavulanate, and cephalothin (60%), and the most common wound isolate E. coli was most susceptible to trimethoprim-sulfamethoxazole (100%). Of the equine isolates, the most common uterine isolate S. equi spp zooepidemicus was most susceptible to penicillin G (92%) and the most common wound isolate S. equi spp zooepidemicus were most susceptible to penicillin G (100%).