Streptococcus equisimilis infection in striped skunks (Mephitis mephitis) in Saskatchewan

Area of Science:

• Veterinary Pathology
• Microbiology
• Wildlife Ecology

Background:

• Striped skunks (Mephitis mephitis) are common in North America.
• Understanding mortality factors is crucial for wildlife management and conservation.
• Winter ecology studies provide insights into survival challenges for wildlife.

Observation:

• Three radio-collared striped skunks were found deceased during a winter ecology field study in Saskatchewan, Canada.
• Necropsies were performed to determine the cause of death.
• Lesions were observed in multiple organs, including the lungs, brain, heart, and thoracic cavity.

Findings:

• Streptococcus equisimilis was identified as the primary causative agent in two skunks, leading to necrotizing purulent pneumonia and suppurative meningoencephalitis.
• Streptococcus equisimilis and Streptococcus canis were isolated from lesions in the third skunk, indicating purulent myocarditis and pyothorax.
• These findings represent the first reported cases of Streptococcus equisimilis infection in striped skunks.

Implications:

• Opportunistic pathogens like Streptococcus equisimilis can pose a significant threat to wildlife populations.
• This research highlights the potential impact of bacterial infections on striped skunk mortality.
• Further investigation into the role of Streptococcus equisimilis in wildlife disease is warranted.