Highly Pathogenic Avian Influenza Spreads Through Air in Chicken Farms

• Innovation, Tech
Author: Hema Ravindran, Cofounder & CEO of KiposTech

I’m an environmental biotechnologist with over a decade working on bioaerosols. The evidence is now clear: highly pathogenic avian influenza (HPAI) can move through the air within and between poultry houses, and that changes how we defend flocks.1-3,4-7 (CDC Travelers’ Health)

Just before sunrise in a modern broiler house, the air is already busy: fans pulling in cool air, birds stirring up feather dander and litter dust, warm currents carrying moisture off the floor. If HPAI is present, the virus doesn’t need a ride on a boot sole to spread,it hitches onto those airborne particles and travels wherever the air goes. During Europe’s 2020–2021 H5N8 wave, investigators directly detected HPAI RNA in both air samplers and farm dust, often early in an outbreak before birds looked obviously ill. That tells us aerosols and dust are not just contamination,they’re a transmission vehicle and a practical surveillance matrix.¹ (CDC Travelers’ Health)

Ventilation can import risk as surely as it exports heat. In the 2015 U.S. Midwest outbreak, researchers coupled wind trajectories with virus-concentration modeling and concluded that many Iowa barns likely received airborne virus carried on fine particulate matter from infected premises, sometimes miles away. The modeled concentrations were low,below classic “minimal infectious dose” thresholds,yet continuous exposure raised infection probabilities enough to explain new farm infections.² (Nature)

Since 2023, the picture has sharpened. A 2025 investigation in Central Europe integrated genomics, meteorology, and barn layout and found windborne H5N1 traveling roughly 8 kilometers between unrelated farms; tellingly, the first sick birds in recipient houses clustered closest to the air inlets, a spatial fingerprint of ventilation-mediated ingress.³ (PLOS)

Meanwhile, the virus has widened its host list. In the United States, a multistate outbreak in dairy cattle began in 2024, the first time these avian viruses were found in cows. CDC now summarizes the situation plainly: H5 bird flu is widespread in wild birds worldwide and is causing outbreaks in poultry and U.S. dairy cows, with several recent human cases in exposed workers.⁴ In two states, 7% of dairy workers tested had serologic evidence of recent H5 infection, underscoring the presence of infectious aerosols in high-shedding, shared-air environments.⁵ (CDC)

Scale matters. Since 2022, the United States has logged thousands of HPAI-positive flocks and well over 100 million birds affected, with federal tracking expanding to livestock as well. USDA maintains live dashboards for confirmed cases in livestock and continues federal orders for testing in cattle, evidence that the response now spans species and airspaces.6-7 (APHIS)

How the virus rides the air, without dumbing it down. Inside a house, particles range from sub-micron aerosols to coarse dust. Infected birds shed virus that binds to or is encapsulated within these particles. Negative-pressure tunnel ventilation can draw outside air directly across a dense flock; if an upwind barn is shedding virus, that intake can carry contaminated aerosols inward. Once in the house, recirculation and bird movement keep particles suspended and redistributed. Field studies show air and dust carry recoverable HPAI material, while modeling and real-world outbreak mapping connect wind fields to new infections downwind.1-3 (CDC Travelers’ Health)

Implications for farm biosecurity and productivity. If you lock the gate and wash the tires but ignore the air, the virus can still walk in through the fans. In past outbreaks, investigators mapped wind, barns, and death patterns and saw the same story: infections starting closest to the inlets and then rippling through the house. In Iowa’s crisis, modeling tied many new farm infections to virus riding fine particles on the wind; even low concentrations, breathed for hours, could light a barn.² In Central Europe, genomics plus meteorology pointed to H5N1 moving roughly 8 km between farms and entering via intake vents.³ Inside houses, teams sampling during H5N8 found viral RNA in air and dust, often early, before obvious illness, showing that everyday dust birds stir up is a vehicle for spread and a useful early-warning matrix.¹ (Nature)

That is why air biosecurity is not optional. A poultry house is a pressure-driven machine: fans pull outside air through inlets, across thousands of lungs, and out the exhaust. If intake air is contaminated, or if indoor dust is allowed to build and recirculate, a single shedding cluster can seed a whole flock in hours. Tightening the building envelope and sealing unintended inlets cuts off easy entry points; keeping litter dry and working to reduce dust resuspension lowers the vehicles viruses ride on; treating incoming or recirculated air (filtration and/or inactivation) intercepts particles before they reach birds; and environmental early-warning, air or dust sampling, can flag a viral signal days before mortality spikes, buying time to isolate or enact emergency controls.¹–³,⁵ These steps protect birds and stabilize throughput, the difference between a normal week and an emergency cull. (CDC Travelers’ Health)

Why this matters now. HPAI’s aerial route lets it move fast inside a house and,under the right winds, between houses. The last two years have shown it can test new species barriers, expanding the airborne “footprint” around agriculture. Air is a biosecurity border. Treat it like one, seal it, clean it, monitor it, and you change outcomes, not just odds.4-7 (CDC)

TL;DR: A deadly strain of bird flu is sweeping through poultry farms, carried by nothing more than the wind. This airborne menace floats from farm to farm, wiping out flocks on an unprecedented scale  and catching farmers off guard. Some are losing their entire livelihood overnight as mass cullings take effect and the outbreak racks up billions in losses . The stakes go beyond the barnyard, our food supply and local economies are on the line, making the fight against this stealthy killer more urgent than ever.

References

  1. Filaire F, et al. Highly Pathogenic Avian Influenza A(H5N8) in aerosols and dust on poultry farms, France 2020–2021. Emerg Infect Dis. 2022;28(7):1404–1412. (CDC Travelers’ Health)
  2. Zhao Y, et al. Airborne transmission may have played a role in the spread of 2015 HPAI outbreaks in the United States. Sci Rep. 2019;9:11755. (Nature)
  3. Nagy A, Černíková L, Sedlák K. Genetic and meteorological evidence of windborne H5N1 between commercial poultry outbreaks (Czech Republic, 2023–24). PLOS One. 2025;20(9):e0319880. (PLOS)
  4. CDC. H5 Bird Flu: Current Situation. Updated July 7, 2025. (CDC)
  5. Mellis AM, et al. Serologic evidence of recent HPAI A(H5) infection among U.S. dairy workers,two states, 2024. MMWR. 2024;73(44):974–979. (CDC)
  6. USDA APHIS. HPAI Confirmed Cases in Livestock (dashboard). Updated July 23, 2025. (APHIS)
  7. Congressional Research Service. The HPAI Outbreak in the United States. R48518, April 29, 2025. (Congress.gov)

Why Air Biosecurity?

• Field Pilots, Regulatory
Author: Raj Singh, Cofounder & CTO of KiposTech

Modern poultry farms face a growing threat from diseases riding invisibly on air currents. Recent avian flu (HPAI) outbreaks have devastated flocks and pocketbooks. In 2015 the U.S. lost 50 million birds in seven months (over $3.3 billion in losses)[1]. More recently, “over 169 million birds” have been affected and costs to producers have exceeded $1.4 billion[2]. Egg prices spiked to an all-time high of $6.22/dozen in 2025, as consumers spent $14.5 billion extra on eggs amid HPAI-driven shortages[3]. These numbers show that every airborne infection can ripple through markets, farms, and families. Yet farmers have traditionally focused on fences, footbaths, and cage cleaning – all essential, but mostly blind to what’s floating in the barn air.

Farm biosecurity usually means boots-on-ground measures. But viruses and bacteria can hitchhike on dust, droplets or even ammonia gases, slipping past hand sanitizers and protective clothing. In fact, USDA studies found that airborne transmission played a clear role: processing infected birds even in controlled settings generated infectious aerosols that sickened nearby chickens (and test ferrets)[4]. In the 2015 HPAI outbreak, researchers noted that “traditional biosecurity protocols…proved unsuccessful” and that fine dust particles in the air likely carried the virus from farm to farm[5]. In short, a sneeze or sprinkler-drip of virus can go where tractors and footbaths cannot.

Gaps in “traditional” biosecurity: Ventilation fans, filters, UV lights and routine sanitation all help, but none neutralize pathogens in air. For example: – Ventilation & Fans: These are great at keeping barns cool, but they move air – and any pathogens in it – rather than killing germs. In fact, viral outbreaks often emerge near air inlets, suggesting infected dust was being sucked into flocks[5].
– Filters (HEPA, inlet screens): HEPA filters can trap particles, but installing them on large farm fans is expensive and they clog with dust. Filters remove some dust, but tiny virus-laden aerosols slip through or accumulate in layers.
– UVC/Light Sterilizers: Ultraviolet light can kill germs in a lab, but in practice UV lamps have short range and get coated with grime in a barn. Michigan engineers found non-thermal plasma inactivates airborne viruses far faster and more completely than UVC[6]. In dusty, crowded barns, UV simply can’t reach all the germs fluttering under a chicken’s feathers.
– Oil/Water Sprays: Misting systems (with oil or water) knock dust down (sometimes by ~20–50%), but don’t kill microbes, and can create other problems[7]. For instance, the University of Georgia found that spraying water in hen houses cut dust by up to 64% but increased ammonia by 21–65%[7]. High ammonia (even 25–50 ppm) damages birds’ lungs and immunity, making infections like influenza and ND even more deadly[8].
– Entry Hygiene: Footbaths, clothing changes and cage washes block bugs on boots and crates, but do nothing about pathogens floating overhead. Once HPAI hits a farm, entire flocks must be culled regardless of footbaths.

In short, even the best static biosecurity measures can leave the barn air unchecked. Scientists note that barn air is full of bioaerosols – bacteria, fungi, viruses and dust from litter, feathers, feed and manure[9]. In tightly packed, poorly ventilated houses these bioaerosol levels can skyrocket. Tiny particles (PM2.5 and smaller) can carry avian influenza and other pathogens deep into birds’ lungs[9]. Meanwhile ammonia and gases not only harm bird health directly – “ammonia can breach respiratory defenses and allow viral and bacterial pathogens into the respiratory system” – but also reduce weight gain and raise mortality[8].

Put simply, the air itself has become a door left open on a pandemic. Farmers know that bad air makes birds sick – but until now they had no easy way to “purify” it. The record of recent outbreaks makes the case clear: pathogens riding on dust or mist can outflank even strict on-the-ground biosecurity[5][4]. To protect flocks (and stabilize egg and meat prices), we must move beyond fences and footbaths. In-barn air disinfection – proactively neutralizing germs in the very air birds breathe – is the next frontier of poultry biosecurity. By scrubbing the air 24/7, we can stop the next outbreak before the first cough of disease.

[1] [5] Airborne transmission may have played a role in the spread of 2015 highly pathogenic avian influenza outbreaks in the United States | Scientific Reports

https://www.nature.com/articles/s41598-019-47788-z?error=cookies_not_supported&code=07f73ef2-d04b-48ba-915b-cb847480be00

[2] Nationwide Avian Flu Response Gains Momentum, Yet Urgent Action Remains Essential

https://www.contagionlive.com/view/nationwide-avian-flu-response-gains-momentum-yet-urgent-action-remains-essential

[3] Supply Constraints From HPAI Cost American Consumers $14.5 Billion In 2024-25 — Innovate Animal Ag

https://innovateanimalag.org/hpai-costs-2025

[4] Project : USDA ARS

https://www.ars.usda.gov/research/project/?accnNo=431882&fy=2018

[6] [10] [11] Cold plasma can kill 99.9% of airborne viruses, study shows – Michigan Engineering News

https://news.engin.umich.edu/2019/04/cold-plasma-can-kill-almost-all-airborne-viruses-study-shows/

[7] Suppressing dust in cage-free henhouse with the sprinkling system | Poultry Tips

https://site.extension.uga.edu/poultrytips/2019/02/suppressing-dust-in-cage-free-henhouse-with-the-sprinkling-system/

[8] veterinarypaper.com

https://www.veterinarypaper.com/pdf/2018/vol3issue4/PartA/3-4-14-175.pdf

[9] Frontiers | Aerosol Concentrations and Fungal Communities Within Broiler Houses in Different Broiler Growth Stages in Summer

https://www.frontiersin.org/journals/veterinary-science/articles/10.3389/fvets.2021.775502/full

[12] [13] [17] [19] [21] KiposTech – The World Food Prize – Improving the Quality, Quantity and Availability of Food in the World

https://www.worldfoodprize.org/en/nominations/innovate_for_impact_challenge/2025_top_10_innovators/kipostech/

[14] [20] Our Solution

https://kipostech.com/our-solution

[15] [16] A smart automatic control and monitoring system for environmental control in poultry houses integrated with earlier warning system | Scientific Reports

https://www.nature.com/articles/s41598-025-17074-2?error=cookies_not_supported&code=5e53e8cb-ef70-4edc-bf05-faed10dcaf7a

[18] Ammonia Robs Efficiency from Poultry Production – Jones-Hamilton Ag

https://joneshamiltonag.com/ammonia-poultry-performance/

Why KiposTech is Better Than Other Technologies?

• Results, Startup Life
Author: Raj Singh, Cofounder & CTO of KiposTech

KiposTech’s Bazooka™ active air disinfection system is designed specifically for the dusty, demanding world of animal farms. Think of it as a steady lightning bolt in the barn air – a cold plasma reactor that zaps germs and particles without any chemicals or filters. In our tests and those of university researchers, non-thermal (cold) plasma proved astonishingly effective. One study showed a plasma “packed-bed” reactor inactivated 99.9% of airborne viruses in a fraction of a second[10]. Over 99% of the sterilization was due to inactivation of the viruses, not just trapping them[11]. In practice, that means barn air literally becomes sterile in place – something no fan, filter or light can match.

How Bazooka’s cold plasma works: In simple terms, the device super-energizes air molecules and water vapor into ions, radicals and charged particles. These reactive bits collide with pathogens and dust, rupturing cell walls and breaking apart viral proteins. The process is completely safe for birds and humans – it doesn’t heat the air or leave any residue – and unlike ozone or chemicals, it won’t create harmful byproducts. The World Food Prize Foundation highlights that KiposTech’s patent-pending plasma “eliminates over 90% of airborne pathogens, dust, and ammonia” continuously[12]. And it does this exactly where it matters: at chicken height. Whereas ventilation treats the whole room, Bazooka units create “clean air bubbles” right in the breathing zone of the flock[13]. In effect, every bird gets its own little filterless air purifier overhead.

By contrast, traditional methods are passive or partial: – Ventilation exchanges barn air with the outside but does nothing to deactivate pathogens. It can even import contamination if outside air is not sterile. – HEPA/room filters trap particles but are rarely practical at farm scale (high cost, heavy maintenance, and viruses smaller than filter pores). – UVC lamps only kill germs in a line-of-sight beam. In a barn with swirls of dust and shadows, much of the air never “sees” the light. Studies note UV is far slower and less thorough than plasma disinfection[6]. – Ozone or photocatalytic units have shown some promise on surfaces, but they struggle in open air and can irritate birds at effective doses. – Dust/oil misters knock down particulate but don’t kill microbes, and can drive up ammonia levels[7] as we saw.

In short, existing options either move air (fans), trap it (filters), or shine on it (UV) – none actively scrubs pathogens from the breathing zone. The Bazooka’s plasma generator both traps and inactivates (like the Michigan study’s packed-bed did[10]), and it runs continuously, 24/7, without filter changes or chemicals. According to KiposTech, their system achieves hospital-grade air cleanliness in minutes – over 12× faster than typical UV arrays[14] – and at very high airflow (400–2000 CFM per unit).

Another key difference is monitoring. Bazooka systems are paired with KiposEye+, a real-time air-quality dashboard. This IoT sensor suite tracks particle counts, ammonia, humidity and other markers of “air health” in the barn. Farmers get instant alerts if things deteriorate (for example, if ammonia creeps up or dust spikes), so they can adjust ventilation or disinfectants proactively. This closed-loop control is unlike standard barns, where ammonia levels were once judged by smell[15]. In fact, modern research shows that cheap IoT units can accurately monitor ammonia and other gases at a small fraction of the cost[16] – and KiposTech’s solution puts that power in every farm manager’s hands.

Validation, ROI and Benefits: KiposTech isn’t guessing on performance. They’re running pilot programs with commercial poultry farms and universities (Pennsylvania, University of Delaware, etc.) to prove real-world ROI[17]. Early results promise huge payoffs. By preventing just one HPAI outbreak or severe mite infestation, a farm can save millions in lost birds and downtime. Even smaller gains matter: cleaner air improves feed conversion and weight gain (birds in low-dust air eat more and grow faster[18]) and slashes chronic respiratory illness. That means fewer antibiotics and medications – a big plus as regulators and consumers demand antibiotic-free poultry. KiposTech’s leadership notes that clean-air biosecurity “reduces antibiotic dependence” and strengthens food safety[19]. In one estimate, their system could save a small farm over $100K per year by boosting productivity and cutting disease losses[20] (even if that number came from swine trials, the principle holds for any livestock).

For investors, the case is compelling. The global “animal biosecurity crisis” is estimated at $10 billion and rising[21]. A unique tech like Bazooka that addresses that gap has major upside. KiposTech’s plasma approach is scalable – the same units can be fitted into swine barns, dairy farms, or even hospitals – and the subscription model (hardware + analytics) promises recurring revenue. By demonstrating cost savings (lower mortality, higher weights, less drug spend) and environmental wins (reduced ammonia, fewer greenhouse gases), KiposTech is positioning Bazooka as a strong market differentiator in a tight-margin industry. In short, it’s clean air where it counts, backed by science. The tech (and its real-time monitoring) is already outperforming old methods, offering farmers and investors both healthier birds and healthier returns[17][19].

Sources: Independent research and government data report skyrocketing HPAI losses and air-quality hazards[1][2][8]. University studies confirm that airborne particles and ammonia undermine bird health[9][8]. Industry publications and academic papers note the limits of UV/filters and highlight cold plasma as a breakthrough[10][6]. (KiposTech’s own pilots and technical claims are covered on WorldFoodPrize and related reports[12][17].)