U.S. flagAn official website of the United States government
                    Here's how you know **Official websites use .gov**
                            
                            A **.gov** website belongs to an official government organization in the United States.
 **Secure .gov websites use HTTPS**
                            
                            A **lock** (                            
                              A locked padlock                                                      
                            
                            ) or **https://** means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.


Menu Agricultural Research Service
						
                    U.S. DEPARTMENT OF AGRICULTURE
 Harry K. Dupree Stuttgart National Aquaculture Research Cntr: Stuttgart, AR
 close



    Research

                    Research Projects
                                    Publications
                                    Collaborations
                                    News
                People

                    Staff Listing
                                    CareersSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Southeast Area Stuttgart, Arkansas Harry K. Dupree Stuttgart National Aquaculture Research Cntr Research Publications at this Location





- ARS National Programs
- Search for a scientific manuscript
- Search for a research project
- ARS Software
- Programs and Projects
- Collaborations
- Subjects of Investigation
- Publications
- IACUC Summary

Title:   Author  item
                                            Straus, David

                                                         - *Dave*item
                                            Griffin, Billy
  Submitted to: Book of Abstracts World Aquaculture Society
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 1/20/2000
                                    Publication  Date: 5/2/2000
                                    Citation: STRAUS, D.L., GRIFFIN, B.R. PREVENTION OF ICHTHYOPHTHIRIASIS IN CHANNEL CATFISH AND BLUE TILAPIA BY TREATMENT WITH POTASSIUM PERMANGENATE.. BOOK OF ABSTRACTS WORLD AQUACULTURE SOCIETY. 2000. p.683.Interpretive Summary:  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) and blue tilapia (Tilapia aurea).  In the initial experiment, theronts were exposed to concentrations of potassium permanganate in 100 ul of well water in a 96-well plate in (n-3) and observed for 4 hrs to determine acute toxicity.  A concentration of 0.9 mg/L potassium permanganate  caused mortality of >95% of the theronts by hr hrs.  In the next experiment, fingerling channel catfish were exposed to at least 10,000 theronts/L of well water and immediately treated with potassium permanganate (n=3).  Infestation was observed in controls at day 7 after exposure.  The lowest effective dose of potassium permanganate was 1.0 mg/L in well water.  In the final experiment, fingerling blue tilapia were exposed and treated as above.  Infestation was observed in controls at day 9 after exposure.  The lowest effective dose of potassium permanganate was 0.5 mg/L in well water.
                                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) and blue tilapia (Tilapia aurea).  In the initial experiment, theronts were exposed to concentrations of potassium permanganate in 100 ul of well water in a 96-well plate in (n-3) and observed for 4 hrs to determine acute toxicity.  A concentration of 0.9 mg/L potassium permanganate  caused mortality of >95% of the theronts by hr hrs.  In the next experiment, fingerling channel catfish were exposed to at least 10,000 theronts/L of well water and immediately treated with potassium permanganate (n=3).  Infestation was observed in controls at day 7 after exposure.  The lowest effective dose of potassium permanganate was 1.0 mg/L in well water.  In the final experiment, fingerling blue tilapia were exposed and treated as above.  Infestation was observed in controls at day 9 after exposure.  The lowest effective dose of potassium permanganate was 0.5 mg/L in well water.


Return to top


Connect with ARS Sign up


ARS Home
                            USDA.gov
                            Plain Writing
                            Policies & Links
                            Civil Rights Statements
                            FOIA
                            Accessibility Statement
                            Privacy Policy
                            Non-Discrimination Statement
                            Quality of Information
                            USA.gov
                            WhiteHouse.gov