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
