Title: Treating a natural outbreak of columnaris in channel catfish with copper sulfate and potassium permanganate Authors
Submitted to: Annual Eastern Fish Health Workshop
Publication Type: Abstract Only
Publication Acceptance Date: March 14, 2011
Publication Date: March 29, 2011
Citation: Straus, D.L., Farmer, B.D., Beck, B.H. 2011. Treating a natural outbreak of columnaris in channel catfish with copper sulfate and potassium permanganate [abstract]. 36th Annual Eastern Fish Health Workshop, March 28 – April 1, 2011, Mt. Pleasant , South Carolina. p.20. Technical Abstract: An F. Columnare-exclusive epizootic occurred in fingerling channel catfish (Ictalurus punctatus) during normal tank culture practices at SNARC. Fish were transferred to the ultra low-flow system and 2.1 mg/L copper sulfate or 3 mg/L potassium permanganate was administered; an untreated control was also included, and there were 4 replications of each treatment. The therapeutants were administered at 24 h intervals for 3 consecutive days. The duration of the experiment was 7 d, and the survival on day 7 was 38.5%, 72.7% and 52.3% for the control, copper sulfate and potassium permanganate treatments, respectively. Only copper sulfate was significantly different from the control (P < or = 0.05). Twenty-four h after the last treatment, a fish from each replicate was sacrificed for gill histology and quantitative PCR analysis of the gill, caudal fin, and liver. The gill, caudal fin, and liver of dead/moribund fish were cultured on selective Ordal’s agar to characterize the disease. Further results will be presented for therapeutic dose-confirmation and quantitative PCR analysis of the water following each treatment. This study suggests that copper sulfate was a more effective treatment than potassium permanganate.