{"id":9578,"date":"2016-08-07T07:30:04","date_gmt":"2016-08-07T07:30:04","guid":{"rendered":"http:\/\/revoscience.com\/en\/?p=9578"},"modified":"2016-08-07T07:30:04","modified_gmt":"2016-08-07T07:30:04","slug":"new-virus-found-during-investigation-into-largemouth-bass-fish-kill","status":"publish","type":"post","link":"https:\/\/www.revoscience.com\/en\/new-virus-found-during-investigation-into-largemouth-bass-fish-kill\/","title":{"rendered":"New virus found during investigation into largemouth bass fish kill"},"content":{"rendered":"
\"A<\/a>
A new virus has been identified in association with a die-off of largemouth bass in Pine Lake in Wisconsin\u2019s Forest County. Although the virus was discovered in association with a fish kill, more work is needed to understand if it is the primary culprit. PHOTO: CLIFF VIA CREATIVE COMMONS<\/figcaption><\/figure>\n

A new virus has been identified in association with a die-off of largemouth bass in Pine Lake in Wisconsin\u2019s Forest County.<\/span><\/p>\n

The previously unknown virus was isolated at the U.S. Fish and Wildlife Service\u2019s La Crosse Fish Health Center from dead fish collected by the Wisconsin Department of Natural Resources (DNR) during an investigation into a May 2015 fish kill in the northeastern Wisconsin lake.<\/span><\/p>\n

The virus\u2019s genome was sequenced at a \u201cvirus hunting laboratory\u201d operated by\u00a0Tony Goldberg<\/span><\/a>\u00a0in the Department of Pathobiological Sciences at the University of Wisconsin\u2014Madison\u2019s\u00a0School of Veterinary Medicine<\/span><\/a>. With the genome in hand, Goldberg and his colleagues scoured genetic databases to see if the virus was known or something novel.<\/span><\/p>\n

The pathogen, according to Goldberg, was indeed new to science and has been dubbed largemouth bass reovirus. It has yet to be directly linked to fish mortality, explains Goldberg. However, the virus is a distant relative of other viruses associated with disease in other fish species, making it a key suspect in the Pine Lake fish kill.<\/span><\/p>\n

[pullquote]The pathogen, according to Goldberg, was indeed new to science and has been dubbed largemouth bass reovirus.[\/pullquote]<\/p>\n

The new virus is described in the online version of the\u00a0Journal of General Virology<\/span><\/a><\/em>\u00a0in a research report authored by Goldberg and colleagues from the Fish and Wildlife Service and the DNR. Its discovery comes against the backdrop of a deadly fish pathogen,\u00a0viral hemorrhagic septicemia virus<\/span><\/a>, which was found in 2006 in Lake Winnebago. Viral hemorrhagic septicemia virus has since been found in lakes Michigan and Superior and, should it spread, poses a threat to Wisconsin\u2019s inland fisheries, including iconic species such as musky, pike, bass, panfish and trout.\u201cWe can\u2019t say if it is directly responsible for fish mortality yet,\u201d says Goldberg. \u201cBut these kinds of viruses are known pathogens of fish, so we would be prudent to be concerned about it.\u201d<\/span><\/p>\n

\u201cLargemouth bass reovirus is only the second representative of its group of viruses,\u201d notes Goldberg, an epidemiologist, world expert on emerging infectious disease, and associate director of research at the UW\u2013Madison\u00a0Global Health Institute<\/span><\/a>. \u201cThis family of viruses are emerging pathogens that infect all sorts of animals. They cause kills in marine and freshwater fisheries, including in wild and farmed populations.\u201d<\/span><\/p>\n

Although the virus was discovered in association with a fish kill, more work is needed to understand if it is the primary culprit, Goldberg says. However, large fish kills involving a single species of fish such as largemouth bass have not been previously recorded at Pine Lake, making the virus a suspicious finding.<\/span><\/p>\n

Should the virus be directly implicated in fish mortality, it will pose a new challenge in the control of fish disease in Wisconsin. Anglers spend roughly $2.1 billion annually in the state, according to the DNR, and the state has an aquaculture industry with an estimated $21 million annual economic impact. The Great Lakes together have a commercial fishery valued at $23 million annually.<\/span><\/p>\n

\u201cThis is a classic example of how science is essential for managing our natural resources and the economic benefits they bring to Wisconsin,\u201d says Goldberg. \u201cWithout strong science, Wisconsin cannot hope to respond effectively to these types of emerging problems.\u201d<\/span><\/p>\n

Identifying the new virus was made possible by \u201cnext generation sequencing\u201d technologies. These methods enable biologists to sequence millions of molecules of genetic material in a sample and then use powerful computers to decipher the results. As the technology becomes more accessible, Goldberg expects other fish viruses to be found.<\/span><\/p>\n

\u201cThe take-home message is that you don\u2019t have to fly to the ends of the Earth to find examples of unknown, emerging diseases,\u201d says Goldberg. \u201cWe can find them right here in Wisconsin.\u201d<\/span><\/p>\n

There is no evidence that the new virus poses a risk to human health.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

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