Bacterial isolates from urine specimen of dogs with urinary tract infections in a geographical region of Central Italy were : Escherichia coli (17.48%), Proteus mirabilis (16.59%), Pseudonionas aeruginosa (7.17%), Staphylococcus aureus (6.72%), alpha-haemolytic streptococci (2.24%), and Klebsiella sp. (0.89%). In vitro antibacterial agent sensitivity showed that none of them was effectively susceptible to any of the antibacterial agents tested, including amikacin, amoxicillin, amoxicillin-clavulanic acid, ampicillin, cefalexin, cefotaxin, doxicyclin, enrofloxacin, erythromycin, gentamycin, kanamycin, netilmycin, rifampicin, streptomycin, sulphamethoxazole/trimethoprim, and tetracyclin.