Fungal and Bacterial Co-Infection of Sea Bass (Dicentrarchus labrax, Linnaeus 1758) in a Recirculating Aquaculture System: Saprolegnia parasitica and Aeromonas hydrophila

Authors : Ezgi DİNÇTÜRK, Tevfik Tansel TANRIKUL, Saniye TÜRK ÇULHA

Pages : 67-71

View : 32 | Download : 9

Publication Date : 2018-06-28

Article Type : Research Paper

Abstract :DOI: 10.26650/ASE201811 Aeromonas hydrophila causes symptoms of hemorrhagic septicemia in acute cases and can cause death in freshwater fish, whereas Saprolegnia parasitica is the cause of ulcers complicated by fungal mycelia located on skin that has lost its scales for various reasons. Both pathogens co-infect recirculating aquaculture systems at the İzmir Katip Çelebi University Fisheries Research and Training Center. Clinical, bacteriological, parasitological, and mycological studies were carried out on 25 fish samples during the infestation. Sabouraud glucose agar and malt extract agar were used to isolate the fungus, and the bacterial isolates were streaked on tryptic soy agar insert ignore into journalissuearticles values(Oxoid); with 5% defibrinated sheep blood. Gray-white cotton-like patches, erosions on the skin, and hemorrhaging were detected on the infected fish samples. The analytical profile index test and molecular identification showed that the bacterial agent was A. hydrophila and a fungal examination and amplification by polymerase chain reaction confirmed that the mycotic agent was S. parasitica.
Keywords : Aeromonas hydrophila, Dicentrarchus labrax, Saprolegnia parasitica

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