Clinical and Pathological Characteristics of Aeromonosis (Aeromonas hydrophila) in Sturgeon Fish under Conditions of Recirculating Aquaculture Systems and Study of the Therapeutic Effect of Bitter Wormwood (Artemisia absinthium L.)

The aim of our study was to determine clinical and pathological characteristics of aeromonosis in sturgeon fish in the conditions of recirculating aquaculture systems and to study the therapeutic effect of bitter wormwood.Fish with clinical signs of the disease were studied, external lesions, behaviour, and reactions were examined, pathological and anatomical analysis was performed, and the degree of lesions was assessed.To investigate the therapeutic properties, 5 experimental groups (n=20) were created.For group 1, an aqueous infusion of wormwood herb was used in the form of therapeutic baths.For group 2, an aqueous wormwood herb infusion was administered orally in therapeutic baths.Group 3 was a complex preparation.For group 4, antibiotics were administered.For group 5, table salt was used.It has been established that at recirculating aquaculture systems, aeromonosis runs in acute and subacute form with clinical signs of bacterialhemorrhagic septicemia.More than 70% of morbidity in acute form was found mainly in fry and yearlings.In the subacute form, fish over a year old and older, less frequently fried and yearlings were predominantly affected.The study of therapeutic properties showed that a low mortality rate was observed in the 1st and 3rd groups.No fish mortality was observed in group 2. The survival rate of fish in the 1st, 2nd and 3rd groups was higher (from 90%) than in the 4th (75%) and 5th (60%).No side effects, irritation, or recurrence were observed with wormwood infusion.The results of studies may be helpful for researchers and specialists in fish farming and aquaculture.