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March 2010-Viral Hemorrhagic Septicemia
Invasive Species of the Month
VHS image
Photo courtesy of Dr. Mohamed Faisal
March 2010 Invasive Species of the month
Viral Hemorrhagic Septicemia Virus (VHSV) 

March calendar events
2010 Oregon Invasive Species Council
calendar events
 
 


What is VHSV?
Viral Hemorrhagic Septicemia (VHS) is a deadly fish virus.  It's not a threat to people who handle infected fish or want to eat their catch, but it is threat to the more than 25 fish species it can kill.  VHS virus is considered an invasive species, but scientists are not sure how the virus arrived.
 

 

What can you do?
  • Anglers should empty their live wells and bliges when they pull out of a lake and disinfecrt their live wells. A solution of one half cup of bleach in five gallons of water kills the virus.
  • Do not move live fish from one location to another.
  • Remove all mud, aquatic plants, and animals from all gear, boat motors, and trailers before leaving a body of water.
  • When cleaning. Gutting fish, ensure that the waste products do not contact waterways.  Dispose of fish internal organs, skin, scales, heads and tails in the garbage.
  • Equipment and clothing used during angling activities should be thoroughly cleaned and disinfected.
  • After angling at a waterbody known to contain VHS, clean and disinfect live wells with a 10% household bleach/water solution. Rinse well to remove residual chlorine and discard away from fish-bearing waters. Chlorine is toxic to fish.
  • Empty bait fish containers, live wells and bilges away from water, in an area where the water will be absorbed into the ground.
If you spot any other potential invasive species in Oregon, report it online at http://oregoninvasiveshotline.org/ or call the Invasive Species Hotline at 1-866-INVADER (1-866-468-2337). This number is toll free.
 

Where?
VHS was found in European freshwater trout dating to the late 1930s and continues to cause epidemics in European trout farms; its first appeared on the US West Coast in 1988 in marine trout and salmon, and started to be noticed in marine fish of the eastern Canadian province of New Brunswisk from 2000-20004.  It was first detected in Great Lakes freshwater fish in 2005.
Lookalike?

Other fish diseases show similar symptoms to VHS (bleeding, bulging eyes, unusual behavior, anemia, bloated abdomen, rapid onset of death) therefore VHS must be confirmed by lab tests. Additionally, some infected fish may not show any signs and transporting these fish to new locations could spread the disease to new waters.


Risk Assessment
Risk Assessment (pdf format)
All Invasive Species of 2010
All invasive species of 2010, and 2009