ニジマスのビブリオ菌病の被害防除に関する研究-予-

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The pressent paper deals with the experiments concerning the effect of sulfadrugs and antibiotics upon a bacterial disease of rainbow-trout. This disease is caused by infection with bacteria designated as Vibrio piscum var. japonicus by the senior author. He is desirous to denominate the disease a vibrio-disease of rainbow-trout. To ascertain the effect of sulfadrugs on therapy or prophylaxis rainbow-trouts inoculated per os with the bacteria were tested. During 4 days, they were fed diets containing daily dosage levels of 0.13g and 0.20g of the drugs per one kg of fish. As the Table 1 shows, the mortalities were as follows: control 11.0% and 14.0%; sulfadiazine 3.5% and 2.5%; thiasin 0.5% and 0.5%; sulfamerazine 0.5% and 1.5%; sulfamine 14.5% and 15.0%. Next, Bacitracin-Penick, TM-5 and Aurofac-2A were tested in the treatments of the disease among fingerling or yearling rainbow-trouts. The dosages rate were: for Bacitrachin-Penick 1/500 of diet and fed the diet 1/25 of fish weight per day; for TM-5 and Aurofac-2A 1/300 of diet and fed diet 1/30 per day. The mortalities were as follows: Bacitracin-Penick 3.2%; control 3.8%; TM-5 3.8%; Aurofac-2A 5.0%; control 7.8% (see Table 2 and Fig. 1).
社団法人日本水産学会の論文