Determination of Staphylococcosis and Micrococcosis outbreak on elected rainbow trout farms in Mazandaran province
Subject Areas : New Technologies in Aquaculture Development
Keywords: Rainbow trout, Bacteria, Mazandaran, Keywords: Staphylococcosis, Micrococcosis,
Abstract :
Abstract[1] The aim of the study is to determine Staphylococcus's & Micrococcus's outbreak and to identify gram positive bacteria pathogen on elected rainbow trout farms in Mazandaran province.Today, Rainbow trout is the number one cold-water fish in the world. Bacterial diseases such as Streptococcus's, Staphylococcus's and Micrococcus's that are created by Gram positive coccid-shape bacteria are one of the most important diseases that cause high mortality in farmed fishes.In this study, 12 farms were selected. For sampling purposes 10 fishes were selected from each farm with clinical sings such as lethargy, darkening, exophthalmia, hemorrhages around the eye and base of the fins. Gram positive coccid bacteria were isolated from the cultures of kidney and liver. The Bacteria isolated from kidney, liver and spleen were cultured in Blood agar or TSA agar plates. Identification of bacteria was conducted by staining and biochemical tests. Staphylococcus was causedby: Staphylococcus epidermidis, Staphylococcus warneri, Staphylococcus chromogens and Staphylococcus cohnii that were identified in spring and summer. Micrococcus luteus was also isolated as causing Micrococcus in fall, spring and summer. Results showed that 44 % of infected fish were suffering from Staphylococcus and 22/22% was suffering from Micrococcus.
_||_