1981 Volume 34 Issue 11 Pages 527-530
Red-fin disease occurred continually in four schools of eels on a fish farm in Mie Prefecture for a year beginning with June, 1978. Affected eels swam inactively near the surface of water at 27-29°C, manifesting anorexia. Main autopsy findings were hyperemia and hemorrhage of the fins, abdominal region, and anus, congestion of the gills. and hemorrhage and discoloration of liver, spleen, kidney, and intestine.
Aeromonas hydrophila was isolated from principal organs. The water of the fish pond was inferior in quality and transparency. The disease became under control by the improvement of environmental conditions and treatment with oxolinic acid.
