September 11, 2012

Today's Wildlife Disease News Stories


Wildlife Health Bulletin - Hemorrhagic Disease in Wild Ruminants

This Bulletin provides a current update on hemorrhagic disease (HD) in wild ruminants. HD is a viral disease caused by either epizootic hemorrhagic disease virus (EHDV) or bluetongue virus (BTV); these Orbiviruses are related, but are genetically distinct. They are spread by biting midges in the genus Culicoides, resulting in seasonal occurrence of the disease. The North American species most affected is the white-tailed deer, but mortality can occur in mule deer, black-tailed deer, elk, bighorn sheep, and pronghorn antelope. The viruses do not infect humans, but may cause
disease of varying severity in sheep and cattle.

... Outbreaks in 2012 have the potential to be more severe because widespread drought and high temperatures cause lower water levels creating more muddy areas favored by the vectors. In addition, herd immunity to HD viruses may be low because five years has lapsed since the last large outbreak. The Southeastern Cooperative Wildlife Disease Study (SCWDS) at the University of Georgia has received HD reports from much of the United States this year and has confirmed deer mortality due to these virus serotypes: EHDV-1, EHDV-2, EHDV-6, or BTV-13 infection in 15 states.

USGS National Wildlife Health Center -
07 Sep 2012
JS Sleeman, USGS National Wildlife Health Center and J Fischer, Southeastern Cooperative Wildlife Disease Study

More Epizootic Hemorrhagic Disease News
>>> MDARD warns of EHD in domestic deer facilities [Maryland, USA]
>>> Deer found dead in Warren County could be latest victims of hemorrhagic virus [Harmony Township, New Jersey, USA - Map It ]
>>> Deer Killing Disease Now in 17 Counties [View latest cases reported in Michigan, USA on the Disease News Map ]

Peru Dolphin and Pelican Mortality 2012: IUCN Wildlife Health Specialist Group Report

Dolphin mortality has been reported along the Northern Peruvian coast (over roughly a 200km area around Tumbes, Piura, Lambayeque and La Libertad regions) since January 2012. Species affected are Delphinus capensis and Phocoena spinipinnis. Isolated reports also mention Tursiops truncatus.

...The die-offs have sparked widespread speculation about the causes, but none have been scientifically confirmed. Necropsy analysis showed no signs of starvation, respiratory, digestive or neurological disease.

...Peru has also experienced avian die-offs this autumn along its northern coast. Pelicans (Pelecanus thagus) have been the most affected species, followed by the Peruvian booby (Sula variegata) and cormorants (Phalacrocorax bouganvillii). The National Service of Animal Health (SENASA at Ministry of Agriculture) collected and analyzed pelican and booby samples at the 4 affected regions: Piura, Tumbes, Lambayeque and La Libertad and reported the finding of Pasteurella multocida.

...On August 7th , a new stranding of up to 60 sea lions on Puerto Pizarro, Tumbes was announced by the media. A quick response of the government supported by local NGOs confirmed the presence of only 12 carcasses; samples were collected by IMARPE and are currently under analysis.

IUCN Wildlife Health Specialist Group -
No date provided
Report courtesy of the Australian Wildlife Health Network


Media release: Lake Hume fish investigation rules out infection

An extensive investigation into sick redfin found in Lake Hume earlier this year has ruled out an infection as the cause of their condition. Over the winter months, recreational anglers at Lake Hume reported a number of redfin in their catches affected by a gill and skin condition.

...DPI Director of Fisheries Management Travis Dowling said the investigation had established dermatitis and chronic branchitis as the cause – not a viral infection.

Dept. of Primary Industries -
31 Aug 2012
Location: Lake Hume, Australia - Map It
Story courtesy of the Australian Wildlife Health Network


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