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).