PPR Resurgence in the Balkan Corridor Threatens European Small Ruminant Sector

A critical mid-year epidemiological assessment jointly issued by the UK Department for Environment, Food and Rural Affairs (Defra) and the World Organisation for Animal Health (WOAH) has placed southeastern Europe on high alert. The report details an elevated, transboundary transmission risk for Peste des Petits Ruminants (PPR)—colloquially known as “Goat Plague”—as chronic, localized viral clusters continue to compromise small ruminant mixed herds across the Balkans.

With the crucial summer livestock trading season rapidly approaching, veterinary authorities warn that informal, unmonitored animal movements risk undercutting the European Union’s aggressive containment protocols.

PPR – Dreaded “Goat Plague”

PPR is caused by a highly contagious Morbillivirus within the Paramyxoviridae family, genetically related to the eradicated rinderpest virus. While it does not pose a zoonotic threat to humans, its impact on domestic small ruminants is catastrophic, exhibiting morbidity rates approaching 100% and mortality rates reaching up to 90% in immunologically naive populations.

The virus primarily spreads through direct contact via aerosols generated by coughing and sneezing, as well as close exposure to contaminated feces, saliva, and nasal secretions.

Clinical Markers Dominating the Balkan Outbreaks

• Peracute Pyrexia: Infected sheep and goats manifest a sudden onset of extreme fever, inducing rapid physical depression and severe lethargy

• Necrotic Stomatitis: The mucosal lining of the mouth develops painful, erosive lesions, preventing normal feeding and causing profuse, fetid salivation

• Mucopurulent Discharges: Heavy, crusting discharge from the eyes and nares leads to matted eyelids and severe dyspnea (breathing difficulty)

• Profuse Enteritis: Secondary viral replication in the gastrointestinal tract triggers severe, foul-smelling, fluid-stripping diarrhea, accelerating fatal dehydration

Balkan Corridor: Active Outbreak Vectors

The virus has exploited interconnected grazing grids and traditional trading pathways across the region. Following its initial high-impact entry into Greece and Romania, active viral circulation has established highly volatile fronts.

• Croatia: Active clusters have re-emerged across mixed farms in Gračac and multiple operations in Prgomet (situated roughly 40km to 80km from the Bosnia and Herzegovina border). Surveillance within designated protection zones continues to yield PCR-positive results in both sheep and dairy goats

• Albania: Strategic containment efforts remain focused on the Progër region. Farms holding mixed stock have triggered repeat sanitary warnings due to active viral shedding, directly threatening adjacent, highly dense small-ruminant populations in northern Greece and North Macedonia

Interventions: Enforcement and Culling

To prevent PPR from cementing its endemic status inside the European Union—which would trigger multi-billion euro trade embargoes on livestock products—veterinary ministries are executing strict containment protocols:

1. Stamping-Out (Total Culling): Upon confirmation of a single PCR-positive index case, the entire mixed herd at the premises is immediately culled. Carcasses are destroyed via secure on-site deep burial or incineration to eliminate environmental viral load

2. Quarantine & Sanitary Zoning: Authorities have established strict 3km Protection Zones and 10km Surveillance Zones around index farms. Within these rings, all small ruminant movements are entirely frozen, and communal grazing is strictly prohibited

3. Disinfection and Traceability: Transport vehicles, holding pens, and feeding infrastructure are subjected to aggressive chemical disinfection cycles. Electronic ear-tag tracking databases are being audited retroactively to map out any potential contact farms

Summer Squeeze: Risk of Informal Trade Pathways

The overarching emergency flagged by Defra and WOAH focuses on the impending summer window. Regional livestock transit typically surges during this period, driven by summer agricultural markets and major cultural events.

Historically, the mountainous, porous border terrain of the Western Balkans has facilitated informal, unmonitored livestock trade networks. Middlemen and smallholders attempting to avoid the economic losses of quarantine restrictions often bypass official Border Control Posts (BCPs).

Veterinary tracking teams warn that a single uncertified, incubating animal moved along these back-channel transit pathways could easily introduce the clade A1 viral strain into adjacent, unexposed interior European regions.

In response, border patrols, satellite-based movement monitoring, and unannounced checkpoint inspections are being scaled up across the Croatia-Albania-Greece corridor to intercept illegal livestock transports before a wider regional disaster unfolds.