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Com objetivo de avaliar as alterações histológicas e comportamentais provocadas pela Aeromonas hydrophila em Rhamdia quelen, diferentes concentrações bacterianas (3,6 x 10(7) e 7,5 x 10(6)UFC - Unidade Formadora de Colônia/ml de solução salina) foram inoculadas por via intramuscular. Para este estudo, foram utilizados 80 juvenis de jundiá com peso e comprimento de 16,55g e 13,23cm, respectivamente. Esses peixes foram mantidos durante 10 dias, em caixas d'água de 250 litros, com condições iguais de temperatura, pH, alcalinidade e dureza. Os jundiás foram observados diariamente e, os moribundos, submetidos a cortes histológicos. Constatou-se então que a Aeromonas hydrophila causa perda de equilíbrio, apatia e exoftalmia, assim como alterações histológicas na pele do tipo necrose, hemorragia e infiltrado inflamatório, atingindo tanto a camada da epiderme como da derme e musculatura. The purpose of this study was to evaluate the histological and behavior alterations induced by the inoculation of different concentrations of Aeromonas hydrophila in jundiás. Eighty (80) animals were used in this study, with 16.55g of weight and 13.23cm of length. Different bacterial concentrations (3.6 x 10(7) and 7.5 x 10(6)UFC - Unity Formation of Colony/ml of saline solution) were inoculated intramuscularly. The animals were kept for 10 days in amianthus aquarium (250 liters) with similar conditions of temperature, pH, alkalinity and hardness. The jundiás were observed daily and the dying ones were used for histological cuts. It was verified that the Aeromonas hydrophila caused balance loss, apathy, exophthalmia and histological alterations like necrosis, hemorrhage and inflammatory infiltrated, reaching the epidermis layer as well as the derme and musculature

ciência rural

Alterações histológicas e comportamentais provocadas pela inoculação de suspensão bacteriana (Aeromonas hydrophila) em juvenis de jundiá (Rhamdia quelen)