Submitted to: Aquaculture America Conference
Publication Type: Abstract Only
Publication Acceptance Date: August 1, 1999
Publication Date: February 2, 2000
Citation: STRAUS, D.L. PREVENTION OF ICHTHYOPHTHIRIASIS IN CHANNEL CATFISH BY TREATMENT WITH POTASSIUM PERMANGANATE.. AQUACULTURE AMERICA CONFERENCE. 2000. p.312. Technical Abstract: Ichthyophthirius multifiliis Ich is a common obligate protozoan parasite that invades the skin and gills of many species of freshwater fish. Potassium permanganate has been used in the past to control infestations of Ich, but its toxicity to the free-swimming infective stage theront is not known. The purpose of this study was to determine the acute toxicity of potassium permanganate to the Ich theront and the effective concentration needed to prevent an initial infestation of Ich in channel catfish Ictalurus punctatus. In the first experiment, theronts were exposed to concentrations of potassium permanganate in 100 ?l of well water in a 96-well plate n = 3 and observed for 4 hr to determine the acute toxicity. A concentration of 1.0 mg/L potassium permanganate caused mortality of >95% of the theronts by 4 hrs. In the second experiment, fingerling channel catfish were exposed to at least 10,000 theronts liter of well water and immediately treated with potassium permanganate n = 3. Infestation was observed in controls at day 4 after exposure and mortality occurred by day 7. The lowest effective dose of potassium permanganate was 1.0 mg/L.