Northern Italy study tracks canine distemper in foxes and badgers

A new study in Animals adds fresh evidence that canine distemper virus is persisting in northern Italy’s wildlife and evolving within a multi-host setting. Researchers investigating wild carnivores in Piacenza province from 2021 through June 2026 detected CDV in 12 of 43 animals tested, including six red foxes and six European badgers, and identified two viral lineages through H-gene sequencing: European Wildlife and Europe/South America-1. (mdpi.com)

The findings build on several years of CDV activity in Italy rather than pointing to a one-off event. The new paper follows the first detection of CDV in Piacenza in 2020, while earlier studies from Emilia-Romagna, Lombardy, Sardinia, and southern Italy have documented repeated circulation in foxes, badgers, wolves, martens, and other carnivores. Prior northern Italy surveillance described outbreaks in 2018–2020 and 2021 involving different phylogenetic groups, suggesting that Italy’s wildlife reservoir is supporting long-term maintenance rather than sporadic spillover alone. (mdpi.com)

In the Piacenza study, surveillance was conducted under the Regional Wildlife Monitoring Plan, which is notable in itself: this was structured field surveillance, not just incidental case finding. The authors report that affected animals showed lesions consistent with distemper, including hemorrhagic enteritis, pneumonia with diffuse hepatization, and footpad hyperkeratosis. Genetic characterization was possible for four samples, three from foxes and one from a badger, which allowed the team to place the strains into the European Wildlife and Europe/South America-1 lineages. The paper also notes that continuous genomic surveillance in Europe is confirming active circulation of diverse CDV clades across wild canids and mustelids. (mdpi.com)

That pattern is consistent with what earlier Italian studies have already been warning about. A 2022 report from Emilia-Romagna found a small outbreak centered in Rimini province plus a separate positive fox in Modena, with two different lineages detected in the same region. A 2021 study from Lombardy likewise documented substantial positivity in foxes and badgers and linked the strains to prior epidemic waves in the Alps and northeastern Italy. More recently, investigators in southern Italy reported Arctic-lineage CDV in wildlife collected from 2022 to 2024, reinforcing the idea that multiple lineages are now co-circulating nationally. (pmc.ncbi.nlm.nih.gov)

Direct outside commentary on the new Piacenza paper appears limited so far, likely because it was published only days ago. Still, the broader expert and regulatory context is clear. WOAH describes canine morbillivirus as a multi-lineage pathogen affecting canids and felids, and its wildlife surveillance guidance emphasizes the value of structured monitoring in free-ranging species. The new paper fits that framework closely: passive and regional wildlife surveillance is what made these detections possible, and the authors position ongoing monitoring as essential for understanding spread, host range, and risk to other susceptible carnivores. (woah.org)

Why it matters: For practicing veterinarians, the biggest takeaway isn’t just that foxes and badgers were positive. It’s that wildlife surveillance is continuing to show persistent CDV circulation at the domestic-wildlife interface in a country with multiple established lineages. That raises the practical stakes for vaccination compliance, especially in dogs with outdoor exposure, rural contact, rescue histories, or contact with wildlife rehabilitation settings. It also matters for diagnostic reasoning: when dogs present with compatible respiratory, gastrointestinal, neurologic, or dermatologic signs, especially if vaccination status is incomplete, distemper still deserves consideration even in areas where companion animal case counts may seem low. For wildlife and public veterinary services, the study is another argument for integrating pathology, molecular testing, and phylogenetics rather than relying on mortality counts alone. (mdpi.com)

There’s also a conservation angle. Prior Italian and European literature has repeatedly framed CDV as a threat not only to domestic dogs, but also to vulnerable wildlife populations, including wolves and endangered carnivores. The coexistence of several lineages in Italy increases the epidemiologic complexity, and earlier authors have cautioned that wildlife detections may represent only the visible portion of a larger transmission network, especially where subclinical infection goes unnoticed. That makes regional surveillance data relevant beyond Italy, particularly for veterinary systems thinking about wildlife reservoirs, transboundary spread, and the limits of relying on dog-only case detection. (pmc.ncbi.nlm.nih.gov)

What to watch: The next signals will be whether additional sequencing expands the lineage picture in Piacenza, whether neighboring provinces or regions report related cases, and whether surveillance begins to detect overlap among European Wildlife, Europe/South America-1, and Arctic-lineage strains in the same ecological corridor. (mdpi.com)