University of Tehran Press Journal of Veterinary Research 2008-2525 56 3 2001 10 23 - - 16511 FA Journal Article 1970 01 01 Some aquarium severum and oscar fish had been brought itSchool of Veterinary Medicine, Ferdowis Mashhad. In the head region and operculum of the fishes some holes have been observed. Physiological behaviour and feeding habitate of the fishes were normal. Poultry gizzard, cow heart and sheep spleen were incoporate in their diet. The lesions tested for presence of parasites were negative but, Aeromonas hydrophila has been isolated from the lesions. The fishes were allocated into two treatment groups, in the fnst group, oral oxytetracycline along with vit D was used and after two weeks signs of improvement was observed, the holes in the head region gradually shrunk and after one month the holes abolished. However, the fishes in second group which have been treated with oral oxytetracycline alone did not show any signs of improvement. Some aquarium severum and oscar fish had been brought itSchool of Veterinary Medicine, Ferdowis Mashhad. In the head region and operculum of the fishes some holes have been observed. Physiological behaviour and feeding habitate of the fishes were normal. Poultry gizzard, cow heart and sheep spleen were incoporate in their diet. The lesions tested for presence of parasites were negative but, Aeromonas hydrophila has been isolated from the lesions. The fishes were allocated into two treatment groups, in the fnst group, oral oxytetracycline along with vit D was used and after two weeks signs of improvement was observed, the holes in the head region gradually shrunk and after one month the holes abolished. However, the fishes in second group which have been treated with oral oxytetracycline alone did not show any signs of improvement. https://jvr.ut.ac.ir/article_16511_26d1669827e7cf897ccaba08952a1192.pdf