National Wildlife Health Center


What's all the buzz about? Stay up-to-date with the latest NWHC and USGS News items below.

Filter Total Items: 121
Date published: February 24, 2021

New study finds SARS-CoV-2 infection in escaped mink in Utah

Evidence of infection with SARS-CoV-2, the virus that causes COVID-19, has been found in escaped farmed mink in Utah, according to a new study published in Emerging Infectious Diseases

Date published: February 1, 2021

Pathology Case of the Month - Mallard Ducks

Case History: In December 2020, a waterfowl mortality event involving approximately 125 mallard ducks (Anas platyrhynchos) was reported in Idaho, USA.

Date published: January 6, 2021

Pathology Case of the Month - Red Wolf

Case History: An adult female 21.6-kg red wolf (Canis rufus) was found dead along the side of a road in North Carolina in November 2012.

Date published: December 28, 2020

Chronic Wasting Disease: Can Science Save Our Dear Deer?

What’s in a name? Chronic wasting disease sounds ominous, too descriptive for comfort, almost impolite in its directness. It is, in fact, a truthful name for a disease and a real threat to North America’s cervids.

Date published: December 1, 2020

Pathology Case of the Month - Eastern Gray Squirrels

Case History: Six eastern gray squirrels (Sciurus carolinensis) were found dead below a tree in a residential yard in Wisconsin, U.S.A. 

Date published: November 1, 2020

Pathology Case of the Month - Northern Pintail Duck

Case History: An adult male Northern Pintail Duck (Anas acuta) was found dead on a refuge in Arizona, US. Collectively at this location, 29 birds including Snow Geese (Chen caerulescens), Canada Geese (Branta canadensis), Mallard Ducks (Anas platyrhynchos), and Northern Pintail Ducks (Anas acuta) were found dead with no reported...

Date published: October 1, 2020

Pathology case of the month - Mountain Cottontail

Case History: In June 2020, one adult female, 950-g, mountain cottontail rabbit (Sylvilagus nuttallii) with bloody nasal discharge was found dead by a private landowner in Montana, U.S.A. and submitted frozen for cause of death determination. Two juvenile rabbits were found dead in proximity.

Date published: September 1, 2020

Pathology case of the month - Desert Cottontail

Case History: An adult male desert cottontail (Sylvilagus audubonii) was found dead on a ranch in west Texas, U.S.A. Other rabbits had been reported sick in the area; clinical signs included lethargy, uncoordinated movements, and blood around the nose and mouth.

Date published: July 31, 2020

Pathology Case of the Month - Mallard Ducks

Case History: In late December 2019, 25 dead mallards (Anas platyrhynchos) were observed in a retention pond belonging to an adjacent factory in Minnesota.

Date published: June 30, 2020

Pathology Case of the Month - Timber Wolf

Case History: An aged adult male 36 kg Timber Wolf was found dead in the winter of 2003 in northern Wisconsin, USA. The weather was clear and cold, with low temperatures in the negative single digits. Wolf and coyote tracks were present in the area.

Date published: June 26, 2020

National Wildlife Health Center Newsletter June 2020

In this edition of the USGS National Wildlife Health Center (NWHC) newsletter, we are focusing on current and collaborative work on chronic wasting disease (CWD).