Selenium toxicosis in a white-tailed deer herd.

Area of Science:

• Veterinary Toxicology
• Wildlife Health
• Environmental Contaminants

Background:

• Selenium toxicosis is a significant concern in wildlife populations.
• Understanding the effects of environmental contaminants on free-ranging animals is crucial for conservation.

Observation:

• A herd of white-tailed deer exhibited clinical signs including anorexia, weight loss, and lameness.
• Elevated selenium concentrations (2.7–8.97 mg/kg wet weight) were detected in the liver tissues of affected deer.

Findings:

• Histopathological examination revealed myocardial necrosis, mineralization, and fibroplasia in the deer.
• This study documents the first confirmed case of chronic selenium toxicosis in white-tailed deer.

Implications:

• This finding highlights the susceptibility of white-tailed deer to selenium poisoning.
• Environmental monitoring for selenium is recommended in areas inhabited by white-tailed deer to prevent further toxicosis events.
• This research contributes to the understanding of selenium's impact on cervid health and informs wildlife management strategies.