Identification of Citrobacter freundii from Skin Wounds in Goldfish (Carassius auratus) and Determination of Antibacterial Susceptibility

Citrobacter freundii is a zoonotic pathogen that causes skin injuries and high mortality rates in fish. This study aims to determine the presence of C. antibiotic susceptibility 50 goldfish (Carassius auratus) wounds with local bleeding between ages 8–18 months three regions (A, B, C) located West Turkey. (22/50; 44%) strains were isolated from wound swab samples by phenotypic genotypic methods. isolates positive for H2S, mannitol, indole, negative gas formation urea. All showed 96% similarity strain BAO2749 according Sanger sequence method. Isolates also resistant ampicillin at 57.09% susceptible cefoperazone sulfamethoxazole-trimethoprim 100%. Statistical analyses evaluated confidence interval 95%. A p value < 0.05 was considered statistically significant. In conclusion, can play significant role pathophysiology infections auratus). It cause commercial losses businesses. For this reason, it will be beneficial control pathogenicity aquarium fish prophylactic applications improve product quality treat diseases ornamental farming.