The comparative effects of streptococcinum and erythromycin in cultured rainbow trout (Oncorhynchus mykiss ) with experimental streptococcusis

 In this study,the comparative study of the streptococcinumanderythromycin effects on cultured rainbow trout (Oncorhynchus mykiss) with experimental streptococcusis. 1treatment and 2 reviews with 15 centigrade degree    in 300 liter tanks that each of them contained of 40 juvenile rainbow trout fish with 25±5 gr weight. Pure culture of S. iniae in sheep blood agar and 400 juvenile rainbow trout fish were adapted in 3 days and in forth day, the juveniles were injected with 10⁶ of S. iniae in 1ml of physiologic serum in the peritoneum of all juveniles spontaneously. After 24 hour, some of symptoms occurred, and the remedies were prescribed: Treatment 1: 0.1gr erythromycin (20percent) for 1kg of the juvenile weight, with fish meal, every morning. treatment  2: one glob of Streptococcinum C30 ,in the water ,every morning.(every morning at 8 am  , the circulation of water was stop for half  hour, then 1 glob of the remedy were put  in the water for 2 week). Treatment3 :( positive   control treatment) without any injection and any therapy. Treatment 4 :( negative control treatment) with injection but without any therapy.
Daily estimation of the water temperature, oxygen, PH and salinity in the controlled situation for rainbow trout.
Daily estimation of survival & mortality, of the juveniles.
Daily survey of clinical symptoms: necrosis of, branches; hyperplasia; melanoma in the braches, melanosis dots in liver, kidney; hart, kidney were bloody; exophthalmia; hemorrhages under the skin, eyes, branches and anus.
Treatment 1 had significance with treatment 2, 3 and 4(p<0.05).