Histopathological Studies on Ulcerated Fish From the Batticaloa Lagoon

Abstract

A disease similar to the epizootic ulcerative syndrome(EUS) made first appearance in Queensland. Australia. From 1979, EUS has spread throughout the South and Southeast Asia and has become a serious problem in fresh and brackish water fisheries. The r.rlcer disease on fish appeared regularly after heavy €in fall each year since then. The fish species viz. Nematalassa lkoi:lj , Mugil cephalus (f.aealai+) , Siganus linelauJ (oora]) , Signaus javus (oddirT), S/itarus virgatus \odd\:f), Siganus oramin lovell oddi4) Sphyraena (seasalT), Uasurus \mural:fl, Slag Osp.(kilLakan) and Pe,{rbasp.($iralilT) were shown lo have ulcers generally on ihe dorsal sudac€ from ihe brackish '"vater area closer to the bar mouth and Pr.rrfussp. (peddiyanll) from the Sooruvamunai and Kakkudah (southern edge) of the