سال انتشار: ۱۳۸۷
محل انتشار: اولین کنگره بین المللی مدیریت بهداشتی و بیماریهای آبزیان
تعداد صفحات: ۱
S Mehdizadeh Mood – Department of Aquatic Animal Health, Faculty of Veterinary Medicine, University of Tehran
M Soltani –
H Ebrahimzadeh Mousavi –
H Bagheri –
Method & Materials: 50 live clinically affected fish were examined. At first wet smear was prepared and investigation for parasitic infestation was continued under the light microscope. Then samples were taken to the aquatic microbiological lab .Gram–staining , Bacterial culture and biochemical tests for bacterial examination were performed.
Results & Conclusion: In wet smear 1-3 Gyrodactylus sp. were observed. However, based on the clinical signs and high mortality, such light
infestation could not have been a probable cause. In necropsy, there were fluid in abdominal cavity with hyperemia in internal organs and necrosis. The bacterial culture indicated the presence of Aeromonas bacteria and biochemical results demonstrated that the species was A. hydrophila. Reducing the number of fish per litre, more frequent water change and addition of Oxytetracycline (50 to 75 mg/kg of fish for 10 days) which has been the drug of choice for treating motile aeromonad septicemias in fishes were recommended for considerable reduction of mortality rate.