Skip Links

USGS - science for a changing world

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

Thumbnail of front cover and link to report (584 KB)


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

Part or all of this report is presented in Portable Document Format (PDF); the latest version of Adobe Reader or similar software is required to view it. Download the latest version of Acrobat® Reader, free of charge.

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.



Study Methods





Contact Information

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo logo U.S. Department of the Interior | U.S. Geological Survey
[an error occurred while processing this directive] URL:
Page Contact Information: Contact USGS
Page Last Modified: Tuesday, November 29 2016, 05:36:47 PM