Flavobacterium columnare, causal agent of columnaris disease, is pathogenic to many
species of freshwater fish throughout the world. The United States channel catfish (Ictalurus
punctatus) aquaculture industry is severely impacted by columnaris disease. The majority of
the F. columnare isolates recovered from diseased channel catfish belonged to either
genomovars I or II. The objective of the present study was to determine if differences existed
in the ability of these genomovars to induce mortality in channel catfish. Single strand …