Caused by infection with Flexibacter columnaris, Flexibacter maritimus aka Cytophaga columnaris, & Bacillus columnaris. Has a distinctive gliding motion under a microscope.
Species especially affected are:Channel Catfish, Eels, Salmonids, in Aquaria Black Mollies.
Flexibacter columnaris, has been identified as the causative organism of 'Black patch necrosis'
Can be treated and eliminated if instructions are followed. May reach higher levels of mortality at elevated temperatures. The treatments are primarily related to freshwater infestations.
From Letters in applied Microbiology Feb. 2008
O. Olivares-Fuster and C.R. Arias
Department of Fisheries and Allied Aquacultures,
Dr. Chacko, Jim
Unity College of Maine
Fish Patholgy Dept.
Dr Prescott, Shawn
Fish Disease Dolau Ltd