Canine distemper is a highly contagious and often fatal disease affecting domestic dogs and wild carnivores. The virus has caused major outbreaks in species of high conservation value, such as tigers, lions, and leopards. This makes managing CDV outbreaks critical in Nepal, home to many threatened carnivores like tigers, leopards, snow leopards, dholes, and wolves, along with a large population of stray dogs. While CDV has been suggested as a threat to wild carnivores, no studies have genetically analyzed the virus in Nepal's wildlife.
We collected samples from stray dogs in Kathmandu Valley and identified the CDV strains as part of the Asia-5 lineage, which also includes strains found in India in dogs, civets, red pandas, and lions. Our analysis suggests CDV is likely maintained in a sylvatic cycle among various carnivores, causing repeated outbreaks. To protect threatened carnivores, we recommend regular CDV surveillance in both wild carnivores and domestic dogs.