India intensifies surveillance as WOAH classifies HPAI as threat to Dairy Cattle

As the WOAH Meetings continue through May 18 to 20, 2026, after landmark institutional decree by the World Organisation for Animal Health (WOAH) formally classifying Highly Pathogenic Avian Influenza (HPAI) as a bovine-emerging disease, India’s central and state animal husbandry departments have shifted to an aggressive, heightened alert.

The Department of Animal Husbandry & Dairying (DAHD), in immediate coordination with State Animal Husbandry departments, has ordered an expansion of nationwide H5N1 surveillance. For the first time in India’s epidemiological history, testing networks are systematically branching outside of standard avian vectors to actively sample the nation’s massive dairy cattle population.

Crucially, central monitoring grids report that no active HPAI outbreaks in Indian commercial poultry have been officially notified to WOAH during the critical May 18–19 window, indicating that current containment barriers are holding steady despite heavy seasonal pressures.

Redefining the Threat: The Bovine Surveillance Pivot

India maintains the largest dairy herd globally, making WOAH’s designation of H5N1 as a bovine-emerging pathogen a matter of critical economic and food security. The DAHD’s updated directive modifies the nation’s Action Plan for Prevention, Control, and Containment of Avian Influenza to cover two distinct fronts:

1. The Ruminant Surveillance Mandate: State veterinary officers are deploying targeted random sampling across high-density milk sheds, particularly targeting lactating cows exhibiting atypical drops in milk production, thick/colostrum-like milk matrices, or sudden acute mastitis that fails to respond to conventional antibiotic therapies.

2. The Avian Firewall: Concurrently, standard biological tracking remains active across commercial layer/broiler pockets, backyard poultry cooperatives, and high-risk migratory bird stopovers.

Regional Risk Scanners: Recent Outbreak Benchmarks

The current elevated vigilance follows localized outbreaks that hit several key agricultural states earlier this season, emphasizing the active circulation of Clade 2.3.4.4b / Clade 2.3.2.1a viruses in the Indian ecosystem:

• Maharashtra: The Navapur cluster in the Nandurbar district served as a major commercial battleground, requiring the containment culling of nearly four lakh chickens across eight positive commercial farms. Strict post-cleanup surveillance is still underway to protect neighboring poultry hubs in Pune and Surat

• Tamil Nadu: Chennai experienced a sharp urban wildlife die-off with the sudden mass mortality of over 1,000 crows. The event triggered border-zone surveillance across the Tamil Nadu-Kerala livestock corridor to prevent viral spillover into high-volume commercial poultry operations

• Bihar: Outbreaks confirmed across six districts—including a commercial unit in Patna and wildlife cases in Bhagalpur and Purnia—further demonstrated the wider geographic distribution of the virus

Protecting Dairy Chain: Pasteurization Integrity

With global attention focused on the detection of H5N1 viral fragments in raw milk in international markets, Indian health authorities have issued public reassurances regarding the safety of the commercial milk supply.

The Food Safety and Standards Authority of India (FSSAI), working alongside dairy cooperatives like Amul and Mother Dairy, confirmed that standard commercial High-Temperature Short-Time (HTST) and Ultra-High Temperature (UHT) pasteurization protocols effectively inactivate the H5N1 virus.

However, veterinary departments have issued strict advisories to rural communities against the consumption of raw, unpasteurized milk, while mandating that any milk from cows showing signs of respiratory or udder distress must be safely discarded and reported immediately.

Indian H5N1 Surveillance

The Epidemiological Outlook

The complete lack of newly reported poultry outbreaks over the last 48 hours gives India’s agricultural sector a vital window to strengthen its defenses. However, with the virus officially recognized as an emerging threat to cattle, the next phase of India’s biosecurity strategy will depend heavily on the ability of state diagnostic labs to quickly catch and isolate any potential mammalian spillover before it can impact the country’s multi-billion-dollar dairy network.