An iridovirus was found in spleen and intestinal
tissue of gouramis from the genus Trichogaster that
were dying with signs of systemic disease. Mortality
rates of affected fish have varied from low
(0.5--10%) to moderate (50%) with death usually
occurring 24--48 hours after the onset of signs.
Clinical signs associated with the presence of the
iridovirus have included darkening of body
coloration and lethargy. Sick gouramis often stop
eating and the abdomen may be distended. Internally,
an enlarged spleen has been the most notable