There has been a serious outbreak of a severe ulcerative condition of wild freshwater fish in Asia for almost a decade. There is a wide range of conflicting views as to its cause. In December 1987, an ulcerative condition was observed to occur among wild fish populations in natural water bodies close to Colombo in Sri Lanka. The disease was first reported from Delgoda area of the Kelani river and in two weeks time simultaneously diseased fish were found Hamilton canal in the West Coast of ...