Wildlife pathology gets a bigger role in disease surveillance

CURRENT FULL VERSION: Wildlife disease surveillance is being reframed around a broader question than spillover alone: how to investigate illness and death in free-ranging animals with enough diagnostic rigor to protect wildlife, livestock, pets, and people. That’s the throughline of “Wildlife Diseases: Pathology and Diagnostic Investigation,” an article by Lorenzo Domenis and Serena Robetto in Animals, which argues for a fuller role for pathology and diagnostic investigation in wildlife health work. The paper appears as part of MDPI’s Animals special issue dedicated to wildlife diseases and diagnostic investigation. (mdpi.com)

The timing matters. Since the COVID-19 pandemic, wildlife health discussions have often centered on zoonotic spillover, but international animal health groups have been trying to widen that lens. WOAH’s wildlife health program says disease events in wildlife can go unnoticed until outbreaks become larger, in part because monitoring systems are fragmented across animal, human, and environmental sectors. The organization’s Wildlife Health Strategy, building on its 2020 framework and a 2025 evaluation, calls for multisectoral wildlife surveillance systems and stronger diagnostic capability across member countries. (woah.org)

That broader surveillance push is now being backed by more formal guidance. In March 2025, WOAH and IUCN published general guidelines for surveillance of diseases, pathogens, and toxic agents in free-ranging wildlife. The document is meant to support national surveillance programs and create a common operational foundation for wildlife authorities and other partners. The guidance underscores that wildlife surveillance is not just about infectious disease emergence, but also about structured investigation of non-infectious conditions and toxic threats. (woah.org)

The Domenis-Robetto article fits squarely into that shift. Although the full text was not accessible in the search results, the abstract and special-issue context indicate the authors are calling attention to pathology and diagnostic investigation as foundational disciplines, not secondary ones. That framing aligns with how major wildlife diagnostic centers already operate. The USGS National Wildlife Health Center, for example, says its wildlife morbidity and mortality investigations rely on pathology, microbiology, virology, parasitology, and chemistry to identify causes of disease events and characterize infectious agents. (usgs.gov)

Related literature also reinforces the One Health stakes at the wildlife-livestock interface. A review in the same journal on ESBL-producing Escherichia coli describes antimicrobial resistance as a cross-ecosystem problem rather than a simple farm-origin spillover story. The authors conclude that livestock, wildlife, and environmental matrices can all act as interconnected reservoirs of resistant E. coli and resistance genes, with transmission shaped by antimicrobial use, farm management, biosecurity, wildlife ecology, environmental contamination, and mobile genetic elements. In that framework, wildlife may serve as sentinel, reservoir, or disperser of resistant bacteria, but detection alone does not establish direct transmission. The review argues that integrated surveillance spanning livestock, wildlife, food chains, and environmental sampling — ideally supported by genomic analysis — is needed to sort out pathways and guide control measures. That complements the broader call for wildlife diagnostics by showing why pathology and field surveillance need to connect with microbiology and molecular epidemiology when veterinarians are investigating interface risks. (preprints.org)

Why it matters: For veterinary professionals, this is less about a single study result and more about where surveillance infrastructure is heading. If wildlife disease investigation is treated as a core diagnostic discipline, veterinarians may see greater demand for coordinated necropsy protocols, better specimen triage, more cross-reporting with wildlife agencies, and stronger interpretation of findings at the domestic animal-wildlife boundary. It also reinforces that companion animal and livestock clinicians can play an early-warning role when unusual syndromes may reflect broader ecological disease activity. And in antimicrobial resistance investigations, the practical takeaway is similar: findings in wildlife should be interpreted within a wider ecological and management context, not assumed to represent one-way transmission from farms or direct risk to people without supporting epidemiologic or genomic evidence. (woah.org)

There was limited direct expert commentary tied specifically to the Domenis-Robetto paper in publicly indexed sources, but the institutional reaction is clear: WOAH is prioritizing wildlife surveillance integration, and diagnostic centers are emphasizing multidisciplinary investigation capacity. From a newsroom perspective, that suggests the article is part of a larger professional shift toward making wildlife pathology more visible within animal health systems, rather than treating it as a niche conservation function. The ESBL E. coli review adds another layer to that shift by underscoring that wildlife surveillance is also relevant to slower-moving, system-level threats such as antimicrobial resistance, where ecology, husbandry, and environmental contamination all influence what veterinarians find at the interface. This is an inference based on the alignment between the paper’s framing and current guidance from WOAH, IUCN, and USGS. (woah.org)

What to watch: The next step is whether these frameworks translate into more standardized reporting, more investment in wildlife diagnostic networks, and clearer pathways for veterinarians, wildlife authorities, and public health teams to share case data in real time. WOAH’s strategy and its recent surveillance guidance suggest that’s the direction of travel. Another sign to watch is whether integrated wildlife-livestock-environment surveillance becomes more routine in antimicrobial resistance programs, especially where genomic tools can help distinguish sentinel detection from actual transmission pathways. (woah.org)