The Philippines: Negros Oriental Culls 539 Pigs as African Swine Fever Resurgence Continues

Provincial veterinary authorities in Negros Oriental have culled 539 pigs during July and August as African Swine Fever continues to re-emerge across multiple local government units, with Bayawan, Tanjay and other areas affected.

DUMAGUETE CITY, Philippines — Negros Oriental is intensifying its response to African Swine Fever (ASF) after provincial veterinary authorities confirmed the culling of 539 pigs during July and August as part of continuing disease-control operations. The latest provincial update highlights ongoing depopulation and surveillance as ASF infections persist across several municipalities and cities.

The Provincial Veterinary Office (PVO) has been implementing depopulation of infected and exposed animals to limit onward transmission. The 539 animals were culled across affected areas, including Bayawan City and Tanjay City, as well as other local government units.

ASF resurgence across Negros Oriental

The latest control campaign follows a series of renewed ASF detections in the province. Earlier reports documented infected and exposed pigs in Tanjay City, Amlan and La Libertad, with authorities subsequently reporting additional affected areas.

By August 20, the PVO had reported continued increases in ASF cases, with Bindoy becoming the latest municipality to record infection. The persistence of new detections despite containment measures indicates that the province remains under significant livestock-health pressure.

Tanjay has been one of the recurrent hotspots. Earlier in July, authorities reported 11 ASF-infected pigs culled in the city, while subsequent operations involved substantially larger numbers of affected or exposed animals.

Depopulation remains the principal outbreak-control tool

Because ASF has no widely available commercial treatment or globally approved vaccine capable of replacing standard outbreak-control measures, rapid identification, movement controls, biosecurity and humane depopulation of infected and high-risk animals remain central to containment.

For smallholder and commercial producers, the economic impact extends beyond animals directly infected with the virus. Depopulation can affect household income, breeding stock, local pork supply and the ability of farmers to restock after restrictions are lifted.

Negros Oriental had already imposed restrictions on the movement of hogs and pork products from ASF-affected areas earlier in 2026 as part of its containment strategy.

Regional significance

The Negros Oriental situation is part of a broader continuing ASF challenge across Asia. FAO’s regional situation update reports that ASF remains active across multiple countries and production systems, reinforcing the importance of early detection, farm-level biosecurity, controlled animal movement and coordinated veterinary surveillance.

For the Philippines, recurring outbreaks create a dual challenge: disease containment and recovery of the domestic swine industry. The effectiveness of provincial responses will depend not only on depopulation but also on rapid laboratory confirmation, tracing of animal movements, disposal of carcasses, disinfection, enforcement of movement restrictions and carefully controlled restocking.

Analyst view

The 539-pig culling figure is significant because it represents cumulative depopulation during July–August rather than a single-day operation on September 1. The distinction is important when assessing the scale and trajectory of the outbreak.

The continuing appearance of ASF in additional local government units suggests that Negros Oriental’s outbreak is not yet fully contained. For producers, the immediate priorities remain strict farm biosecurity, early reporting of clinical suspicion, prevention of unauthorized pig movements and avoidance of contact between commercial/backyard herds and potentially infected animals or materials.

Bottom line: Negros Oriental’s cumulative culling of 539 pigs demonstrates the continuing economic and veterinary impact of the 2026 ASF resurgence. The emergence of infections in additional municipalities means that sustained surveillance and movement control will remain critical to preventing further expansion of the outbreak.