Abstract
Outbreaks of bacterial gill disease (BGD) occurred among cultured rainbow trout (Oncorhynchus mykiss) in Chungbuk province of Korea. Gram-negative, filamentous and yellow-pigmented bacteria were isolated from the diseased fish. The morphological, physiological, biochemical, and antigenic properties of the Korean isolates were consisted with those of Flavobacterium branchiophilum (ATCC 35035T and ATCC 35036) isolated from salmonid fish in Japan and Oregon, USA. It was concluded that the Korean isolates were identified as F. branchiophilum.
