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Fact Sheet 2009–3107

Evaluation of the Efficacy of Iodophor Disinfection of Walleye and Northern Pike Eggs to Eliminate Viral Hemorrhagic Septicemia Virus

By M.T. Tuttle-Lau, K.A. Phillips and M.P. Gaikowski

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Summary

Viral hemorrhagic septicemia virus (VHSv) is a serious fish pathogen that has been responsible for large-scale fish kills in the Great Lakes since 2005. It causes high mortality and resulting outbreaks have severe economic consequences for aquaculture. Iodophor disinfection of salmonid eggs is a standard hatchery practice to reduce the risk of pathogen transfer during gamete collection (“spawning”) operations and is thus a leading candidate for reducing VHSv transmission during and after spawning of nonsalmonid fishes. However, before it is incorporated by hatcheries during nonsalmonid fish spawning efforts, its safety and effectiveness needs to be evaluated. The USGS Fact Sheet 2009–3107, “Evaluation of the Efficacy of Iodophor Disinfection of Walleye and Northern Pike Eggs to Eliminate Viral Hemorrhagic Septicemia Virus” presents the results of a study to assess the effectiveness of iodophor disinfection for eliminating VHSv (strain IVb) from fertilized eggs of walleye and northern pike intentionally challenged with VHSv following egg fertilization. Walleye and northern pike egg survival (hatch) following iodophor egg disinfection also was assessed.

First posted January 2010

For additional information contact:
Maren T. Tuttle-Lau or Mark P. Gaikowski
Upper Midwest Environmental Sciences Center
U.S. Geological Survey
2630 Fanta Reed Rd.
La Crosse, WI 54603

http://www.umesc.usgs.gov/

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Suggested citation:
Tuttle-Lau, M.T., Phillips, K.A., and Gaikowski, M.P., 2010, Evaluation of the efficacy of iodophor disinfection of walleye and northern pike eggs to eliminate viral hemorrhagic septicemia virus: U.S. Geological Survey Fact Sheet 2009-3107, 4p.


Contents

Background

Study Methods

Results

Conclusions

References

Acknowledgements

Contact Information


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