Fish & Wildlife Disease


USGS is the lead Federal agency for wildlife disease research and surveillance. Our wildlife health capabilities provide research, information, and technical assistance needed to manage wildlife through disease events. Congress and our partners rely on our science to make informed decisions about fish and wildlife disease policy, planning and management.

Bsal a Threat to Vulnerable Amphibian Hosts

Bsal a Threat to Vulnerable Amphibian Hosts

Batrachochytrium salamandrivorans (Bsal) in Appalachia: Using Scenario Building to Proactively Prepare for a Wildlife Disease Outbreak Caused by an Invasive Amphibian Chytrid Fungus

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USGS Response to White-Nose Syndrome in Bats

USGS Response to White-Nose Syndrome in Bats

USGS science has been a critical part of understanding, and responding to, white-nose syndrome. Learn more about the USGS response in this new fact sheet.

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Date published: November 9, 2018

Multi-Partner Workshop Highlights Science Actions for a Potential Wildlife Disease Outbreak

A new USGS Open-File Report outlines findings from a scenario building workshop on a wildlife disease, facilitated by the Department of the Interior’s Strategic Sciences Group (SSG) and led by the USGS. 

Date published: October 26, 2018

A Unified Research Strategy for Disease Management

As wildlife diseases increase globally, an understanding of host-pathogen relationships can elucidate avenues for management and improve conservation efficacy. Amphibians are among the most threatened groups of wildlife, and disease is a major factor in global amphibian declines.

Date published: September 18, 2018

Science for a Risky World: A USGS Plan for Risk Research and Applications – USGS publishes strategic plan for examining risk

USGS explores opportunities to advance its capabilities in risk assessment, mitigation, and communication in new strategic plan.


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Year Published: 2019

Caryospora-like coccidia infecting green turtles (Chelonia mydas): An emerging disease with evidence of interoceanic dissemination

Protozoa morphologically consistent with Caryospora sp. are one of the few pathogens associated with episodic mass mortality events involving free-ranging sea turtles. Parasitism of green turtles (Chelonia mydas) by these coccidia and associated mortality was first reported in maricultured turtles in the Caribbean during the 1970s. Years later,...

Stacy, Brian A.; Chapman, Phoebe A.; Stockdale-Walden, Heather; Work, Thierry M.; Dagenais, Julie; Foley, Allen M.; Wideroff, Morgan; Wellehan, Jr.; Childress, April L.; Manire, Charles A.; Rodriguez, Mya; Zachariah, Trevor T.; Staggs, Lydia; Zirkelbach, Bette; Nahvi, Nina; Crowder, Whitney; Boylan, Shane M.; Marquardt, Shelly; Pelton, Craig; Norton, Terry M.

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Year Published: 2019

Life cycle of the trout cecal nematode, Truttaedacnitis truttae (Nematoda: Cucullanidae): Experimental and field observations

Truttaedacnitis truttae is a cucullanid nematode of primarily salmonine fishes. Brown trout (Salmo trutta) in Europe reportedly become parasitized by ingesting lampreys (Lampetra planeri) carrying infective larvae. However, our field and laboratory observations suggested that North American specimens of T. truttae have an...

Choudhury, Anindo; Cole, Rebecca A.

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Year Published: 2019

Wing abnormality in wild-hatched Whooping Crane (Grus americana) chick from the Louisiana nonmigratory population

We describe a wing abnormality present in a wild-hatched Whooping Crane (Grus americana) chick from the reintroduced Louisiana nonmigratory population. Despite its compromised flight ability, the chick fledged, reached independence, and lived until 13 months of age. Necropsy revealed a healed fracture near the left carpus likely resulting from...

Vasseur, Phillip L.; Zimorski, Sara E.; Szyszkoski, Eva K; LaCour, James M; Lankton, Julia S.