A5030601514- Rangeland and Wildlife Management
- Viral Infections and Vectors
- Wildlife Ecology and Conservation
- Influenza Virus Research Studies
- Animal Disease Management and Epidemiology
- Microbial infections and disease research
- Marine Toxins and Detection Methods
- Mercury impact and mitigation studies
- Arctic and Antarctic ice dynamics
- Mosquito-borne diseases and control
- Animal Ecology and Behavior Studies
- Protist diversity and phylogeny
- Aquaculture disease management and microbiota
- Marine and coastal ecosystems
- Animal Virus Infections Studies
- Avian ecology and behavior
- Viral gastroenteritis research and epidemiology
- Agriculture and Farm Safety
- Environmental Toxicology and Ecotoxicology
- Genetic diversity and population structure
- Climate variability and models
- Marine animal studies overview
- Nicotinic Acetylcholine Receptors Study
- Identification and Quantification in Food
- Parasite Biology and Host Interactions
National Wildlife Health Center
2014-2023
United States Geological Survey
2014-2023
Ames National Laboratory
2015
Washington State University
2015
Washington State Department of Agriculture
2015
Washington Department of Fish and Wildlife
2015
United States Department of Agriculture
2007
Wisconsin Department of Natural Resources
2005
About 62,000 dead or dying common murres (Uria aalge), the trophically dominant fish-eating seabird of North Pacific, washed ashore between summer 2015 and spring 2016 on beaches from California to Alaska. Most birds were severely emaciated and, so far, no evidence for anything other than starvation was found explain this mass mortality. Three-quarters in Gulf Alaska remainder along West Coast. Studies show that only a fraction die at sea typically wash ashore, we estimate total mortality...
Novel Eurasian lineage avian influenza A(H5N8) virus has spread rapidly and globally since January 2014. In December 2014, H5N8 reassortant H5N2 viruses were detected in wild birds Washington, USA, subsequently backyard birds. When they infect commercial poultry, these highly pathogenic pose substantial trade issues.
Lead poisoning occurs worldwide in populations of predatory birds, but exposure rates and population impacts are known only from regional studies. We evaluated the lead 1210 bald golden eagles 38 US states across North America, including 620 live eagles. detected unexpectedly high frequencies eagles, both chronic (46 to 47% as measured bone) acute (27 33% 7 35% liver, blood, feathers). Frequency was influenced by age and, for region season. Continent-wide demographic modeling suggests that...
Abstract A novel highly pathogenic avian influenza virus belonging to the H5 clade 2.3.4.4 variant viruses was detected in North America late 2014. Motivated by identification of these domestic poultry Canada, an intensive study initiated conduct surveillance wild birds Pacific Flyway United States. total 4,729 hunter-harvested were sampled and 1.3% (n = 63). Three subtypes isolated from birds, H5N2, H5N8, H5N1, representing wholly Eurasian lineage H5N8 two reassortant viruses. Testing 150...
Eurasian (EA)-origin H5N8 clade 2.3.4.4 avian influenza viruses were first detected in North America during December 2014. Subsequent reassortment with American (AM) low-pathogenic wild-bird-origin has generated at least two reassortants, including an EA/AM H5N1 from apparently healthy wild green-winged teal, suggesting continued ongoing reassortment.
We diagnosed infectious canine hepatitis in a free-ranging brown bear ( Ursus arctos horribilis) cub from Alaska, US, found dead October 2015. Intranuclear inclusion bodies were present hepatocytes, and immunohistochemistry showed reactivity to adenoviral antigens. Sequencing of the hexon protein adenovirus 100% identity 1.
As harmful algal blooms (HABs) increase in magnitude and duration worldwide, they are becoming an expanding threat to marine wildlife. Over the past decade, of algae that produce neurotoxins domoic acid (DA) saxitoxin (STX) documented concurrent seabird mortality events have increased bicoastally United States. We conducted a retrospective analysis HAB related California, Washington, Rhode Island between 2007 2018 involving 12 species seabirds, document levels, ranges, patterns DA STX eight...
In 2014, clade 2.3.4.4 H5N8 highly pathogenic avian influenza (HPAI) viruses spread across the Republic of Korea and ultimately were reported in China, Japan, Russia, Europe. Mortality associated with a reassortant HPAI H5N2 virus was detected poultry farms western Canada at end November. The same strain (with identical genetic structure) then free-living wild birds that had died prior to December 8, unrelated causes Whatcom County, Washington, U. S. A., an area contiguous index Canadian...
During 2005–2006, sera and tissues from raccoons (Procyon lotor), coyotes (Canis latrans), skunks (Mephitis mephitis) the state of Wisconsin were tested for Toxoplasma gondii infection. Antibodies to T. found in 32 54 (59.2%) raccoons, 18 35 (51.4%) coyotes, 5 7 (71.4%) using modified agglutination test a cut-off titer 1:20. Pooled (brains, hearts, tongues) 30 15 1 skunk bioassayed infection mice or cats. Viable was isolated (16.7%) 6 (40.0%) skunk. Genetic characterization 12 parasite...
West Nile Virus (WNV) infection has been reported in over 300 species of birds and mammals. Raptors such as eagles, hawks falcons are remarkably susceptible, but reports WNV Bald Eagles (Haliaeetus leucocephalus) rare grebes (Podicipediformes) even rarer. We report an unusually large wild bird mortality event involving between 15,000-20,000 Eared Grebes (Podiceps nigricollis) 40 around the Great Salt Lake, Utah, November-December 2013. Mortality was first early November during a period when...
Paralytic shellfish poisoning (PSP) is an acute toxic illness in humans resulting from ingestion of contaminated with a suite neurotoxins (saxitoxins) produced by marine dinoflagellates, most commonly the genus Alexandrium. Poisoning also has been sporadically suspected and, less often, documented wildlife, often association outbreak humans. Kittlitz's Murrelet (Brachyramphus brevirostris) small, rare seabird Northern Pacific declining population. From 2008 to 2012, as part breeding ecology...
From August through December 2015, beachcast bird survey programs reported increased deposition of Common Murres (Uria aalge) on central and northern California beaches, but not southern beaches. Coastal wildlife rehabilitation centers received more than 1,000 live, stranded, debilitated murres from Sonoma County to San Luis Obispo during August–October. Approximately two-thirds admitted birds were after-hatch-year in emaciated body condition various stages molt, with extremely worn plumage....
Alopecia (hair loss) has been observed in several marine mammal species and potential energetic consequences for sustaining a normal core body temperature, especially Arctic mammals routinely exposed to harsh environmental conditions. Polar bears (Ursus maritimus) rely on thick layer of adipose tissue dense pelage ameliorate convective heat loss while moving between sea ice open water. From 1998 2012, we an alopecia syndrome polar from the southern Beaufort Sea Alaska that presented as...
In 2013, a mortality event of nonnative, feral Rosy-faced Lovebirds ( Agapornis roseicollis) in residential backyards Maricopa County, Arizona, US was attributed to infection with Chlamydia psittaci. June 2014, additional occurred the same region. Accordingly, August 2014 we sampled live lovebirds and sympatric bird species visiting backyard feeders determine prevalence DNA seroprevalence antibodies C. psittaci using real-time PCR-based testing elementary body agglutination, respectively....
We isolated Bisgaard taxon 40 from Rhinoceros Auklets ( Cerorhinca monocerata) with pneumonia and septicemia Washington, US, found dead in 2016. Previously only the respiratory tract of a gull (Laridae), little is known about its pathogenic potential whether it acts as primary or opportunistic pathogen.
From 12 May 2013 to 29 2013, the Gull-billed Tern (Gelochelidon nilotica) colony at San Diego Bay National Wildlife Refuge, California, US, experienced a mass die-off of least 92 adults, representing 71-92% breeding population on US west coast. Cause death was determined be peritonitis due perforations intestine by large quantity acanthocephala (Profilicollis [=Polymorphus] altmani). This is unique report P. altmani infecting G. nilotica, and great impact tern in southern California. Mole...
First posted June 14, 2016 For additional information, contact: Director, National Wildlife Health Center U.S. Geological Survey 6006 Schroeder Rd. Madison, WI 53711–6223 http://www.nwhc.usgs.gov/ In wildlife disease investigations, determining the history or background of a problem is first significant step toward establishing diagnosis and aiding agencies with management considerations. The diagnostic process overall investigation often greatly expedited by chronological record...