Illinois cull of 934,600 birds remains largest active US bird flu outbreak

What the USDA confirmed in Illinois

The USDA confirmed the outbreak on 19 October at a commercial table egg layer facility in Clinton County, Illinois [3][20]. Village officials told KSDK the operation was Rose Acre Farms, outside Germantown, about 46 miles east of St. Louis [3][20].

For egg buyers, the immediate effect is lost supply at one large site as holiday demand builds. Preliminary assessments put the outbreak at roughly under 0.5% of the US table-egg laying flock, according to Rohit Tripathi, vice president of industry strategy at Relex [7]. What is still unknown is whether more detections follow the autumn migration, and when Washington will decide on poultry vaccination [16].

The facility is the second-largest of its kind in the country, the Food Institute reported on 29 October [20]. Nearly 1 million chickens were killed there [3].

It is also the largest active US outbreak. The next biggest is in Minnesota, where 168,880 birds have been affected statewide [20]. Each detection triggers mandatory depopulation of every bird on the affected premises, so a single positive test produces a six-figure cull [4]. Illinois is not the only recent case: a separate outbreak in California on 28 October affected about 1.3 million laying hens, according to USDA data cited by Food Ingredients First [7]. In Europe, Wageningen University & Research reported the first Dutch poultry farm outbreak of the 2026/27 season [7].

Why a 934,600-bird cull is not a national price shock

Tripathi cautioned against reading a nationwide price rise into a single outbreak. "The Illinois outbreak is significant for the affected producer and its customers, particularly as the food industry prepares for holiday demand," he said, adding that the scale needs context [7].

Regional shortages are the nearer risk. Eggs are not interchangeable between suppliers and markets, because they must meet requirements on size, quality, housing, packaging and delivery, Tripathi said [7]. A retailer or food manufacturer can therefore face a shortage even when enough eggs exist elsewhere in the country [7]. Wholesale markets adjust relatively quickly as buyers seek alternative suppliers, while retail prices move more slowly because of existing contracts, inventory and pricing arrangements [7].

The national forecast points down, not up. The USDA's October Food Price Outlook projects US retail egg prices will fall 29.3% in 2026 compared with 2025, while poultry prices rise 1.2% [7]. Those annual figures do not account separately for the latest outbreaks [7].

Large eggs were averaging $2.27 per dozen when the Food Institute reported on 29 October [20]. Chicken meat needs a separate reading: egg-laying operations and broiler production run on different supply chains, Tripathi said [7].

The price backdrop before the Illinois cull

Retail egg prices peaked at $6.23 per dozen on average in March 2025 [4]. By May 2026, the USDA Economic Research Service had the average at $2.19, down 35.2% from the same month a year earlier [4].

Depopulation numbers moved the other way. US egg producers destroyed about 12.4 million commercial laying hens in 2026 through the spring [4]. That compares with 5.4 million in the whole second half of 2025, according to WATT Poultry figures cited by Tech Times [4]. The USDA ERS says large-scale flock depopulations usually show up in retail egg prices within six to eight weeks [4]. Earlier in the year the USDA forecast a 30.4% decline in egg prices for 2026 [4]. The October outlook put the fall at 29.3% [7].

Wholesale prices hit extreme lows in early 2026, with some grades trading below a dollar per dozen as the market swung into oversupply [4].

The vaccination fight behind the cull

Since February 2022, detections of highly pathogenic avian influenza in flocks have led to the slaughter of more than 100 million chickens and turkeys, the American Council on Science and Health noted on 28 October [16]. About 75% of those birds were egg producers [16].

The industry is split on the remedy. The United Egg Producers says it "firmly believes that vaccination is a necessary tool," while the National Chicken Council opposes vaccination, according to the same analysis [16]. Economics explain much of the gap. Broilers and roasters account for only 8% of bird flu infections and are kept for six to eight weeks, while egg producers keep flocks for about two years, the Congressional Research Service found [16].

France adopted poultry vaccination in 2023 and saw outbreaks fall 96% over two years [4]. The USDA has paid to develop H5N1 vaccines but has not deployed them, citing trade risks, Tech Times reported [4]. It also estimated the cost to consumers at $14.5 billion in higher egg costs in a single outbreak year [4]. Taxpayer-funded indemnification payments added more than $1.8 billion [4].

Two veterinary policy specialists, Ellen P. Carlin and Gwendolen Reyes-Illg, described the US approach in January as a "Groundhog Day" cycle of winter outbreak, mass culling and restocking [4].

What to watch before the holidays

Seasonal demand from bakeries, retailers and foodservice operators is rising while manufacturers work through supply constraints and procurement risk, Food Ingredients First reported [7]. Some are turning to alternative sourcing and reformulation [7].

Repeated outbreaks carry bigger risk when they hit several farms or regions before supply networks can adjust, Tripathi said [7].

The USDA's October forecast does not model the price effect of the newest outbreaks separately, so any shift will appear in later outlooks [7]. On vaccination, the American Council on Science and Health says Washington continues to hesitate [16].