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Objetivando o delineamento do perfil de sensibilidade dos agentes bacterianos causadores de enfermidades em peixes, 51 isolados bacterianos provenientes de Jundiá e pertencentes aos gêneros Acinetobacter spp. (8), Aeromonas spp. (15), Edwardsiella spp. (2), Enterobacter spp. (2), Klebsiella spp. (1), Plesiomonas spp. (5), Pseudomonas spp. (1), Staphylococcus spp.(11) e Vibrio spp. (6) foram testados frente aos antimicrobianos utilizados no tratamento de enfermidades em peixes. Dos 51 isolados bacterianos obtidos de exemplares de Jundiá (Rhamdia quelen) 51 (100%) foram sensíveis a gentamicina, 49 (96,08%) ao sulfazotrim, 47 (92,16%) ao cloranfenicol, 43 (84,31%), a tetraciclina, 43 (84,31%) ao ácido nalidíxico, 31 (60,78%) à nitrofurantoina, 22 (43,14%) à eritromicina, 22 (43,14%) à ampicilina, 15 (29,41%) à espiramicina, 13 (25,50%) à colistina e 5 (3%) foram sensíveis a penicilina G. Com exceção de um isolado do gênero Staphylococcus spp., as bactérias analisadas no presente estudo foram resistentes a um ou mais agentes antimicrobianos testados. O conhecimento do perfil de sensibilidade das bactérias envolvidas em processos infecciosos nos peixes permitirá aos técnicos à adoção de uma antimicrobianoterapia racional, que contribuirá para o controle das enfermidades em Rhamdia quelen, sem causar grandes riscos à saúde pública e ao meio ambiente. Aiming the evaluation of sensitivity profiles of pathogen bacteria responsible for fish diseases, 51 bacterial isolates from Jundiá (Rhamdia quelen) belonging to the genus Acinetobacter spp. (8), Aeromonas spp. (15), Edwardsiella spp. (2), Enterobacter spp. (2), Klebsiella spp. (1), Plesiomonas spp. (5), Pseudomonas spp. (1), Staphylococcus spp. (11), and Vibrio spp. (6), were tested against antimicrobial agents used for treatment of bacterial fish diseases. All samples were processed at the Laboratory of Bacteriology, Department of Preventive Veterinary Medicine, UFSM. From 51 bacteria isolated from jundiá fishes (Rhamdia quelen) 51 (100%) were sensitive to gentamycin, 49 (96,08%) to sulphazotrin, 47(92,16%) to chloramphenicol, 43 (84,31%) to tetracylin, 43 (84,31%) to naldixic acid, 31 (60,78%) to nitrofurantoin, 22 (43,14%) to erytromycin, 22 (43,14%) to ampicillin, 15 (29,41%) spiramycin, 13 (25,50%) to cholystin, and 5 (3%) to penicillin G. With exception of an isolate of Staphylococcus spp., the bacteria analyzed in the present study were resistant to one or more antimicrobial agents tested. Knowledge of the sensitivity profile of bacteria involved in infectious processes in fish will allow rational antimicrobial treatment that will contribute to the control of fish diseases in Rhamdia quelen without causing great risks to public health and the environment

Sensibilidade antimicrobiana de bactérias isoladas de Jundiá (Rhamdia quelen)