The analysis of isolation and antibiotic resistance of gram ( - ) bacteria isolated from some freshwater fishes inhabited the rivers in Ankara and its environment

In this study, Aeromonas spp., Pesudomonas spp. and from the family of Enterobacteriaceae, E.coli, K. pneumoniae, C. freundii, P. vulgaris, E. agglomerans were isolated and identified from fish (skin, gill, intestine), water and sediment samples collected from the rivers Kızılırmak and Sakarya around Ankara (Turkey) and tested for sensitivity to antibiotics. The rate of dispersion of total 116 gram (-) islolated bacteria is identified as 37,9%, Aeromonas spp., 17,2% Pseudomonas spp., 15,5% E. coli, 10,3% K.pneumoniae, 7,7% C. freundii, 6,8% P. vulgaris and 4,3% E. agglomerans. The dispersion of antibiotic resistances obtained by disk difusion and microdilution methods are identified respectively, for Aeromonas strains ticarcillin (54,4%) and amikacin (22,8%) ? (0%), for P. aeruginosa strains tetracycline (71,4%) ? (57,1%) and ticarcillin (42,9%), for other Pseudomonas strains tetracycline (69,3%) ? (30,7%), for E. coli strains tikarcillin (83,4%) and gentamicin (50,1%) ? (11,1%), for K. pneumoniae strains tikarcillin (50%), cefotaxime (41,6%) ? (16,7%), ciprofloxacin (91,7%) ? (16,7%), amikacin (25%) ? (8,3%), chloramphenicol (83,4%) - (16,7%), tetracycline (100%) ? (100%), ceftazidime (100%) ? (0%) ve imipenem (33,3%) ? (0%), for C. freundii strains tetracycline (44,5%) ? (0%) ve ceftazidime (66,7%) ? (11,1%), for P. vulgaris strains tikarcillin (25%), amikacin (50%) ? (12,5%) and tetracycline (100%) ? (100%), for E. agglomerans strains tikaricillin (20%).Key Words : Aeromonas, Pseudomonas, Enterobacteriaceae, izolation, identification, antibiotic resistance