Spirocercosis in Wildlife: Insights for Conservation

Area of Science:

• Veterinary Parasitology
• Wildlife Ecology
• Conservation Medicine

Background:

• Spirocerca nematodes infect domestic dogs and wild carnivores worldwide, with transmission via dung beetles.
• Spirocercosis in wildlife is understudied, lacking understanding of its conservation implications.
• This review synthesizes current knowledge on Spirocerca infections in wildlife.

Purpose of the Study:

• To review existing research on spirocercosis in wildlife.
• To identify key differences between spirocercosis in wild and domestic carnivores.
• To assess the potential impact of spirocercosis on wildlife conservation.

Main Methods:

• Literature review of studies on Spirocerca spp. in wildlife.
• Analysis of reported pathological signs and complications in infected wild carnivores.
• Comparison of spirocercosis manifestations between wild and domestic hosts.

Main Results:

• Spirocerca spp. found in 35 wild species across 31 countries and five continents.
• Common signs include aortic aneurysms, gastric/esophageal nodules, and thoracic/abdominal migration.
• Vertebral spondylitis and hypertrophic osteopathy, seen in dogs, were absent in wildlife.

Conclusions:

• Differences in spirocercosis pathology between wild and domestic carnivores may relate to host immunity, diet, or evolved resistance.
• Spirocercosis likely has minimal impact on healthy wild populations but poses a severe threat to critically endangered species.
• Future research should employ molecular methods for Spirocerca species identification in wildlife surveillance.