Few states are tracking dairy farmer worker health protections amid current Bird Flu outbreak


Records from 15 states with confirmed cases of bird flu in dairy cattle in the USA. Nearly 700 dairy cattle have been found infected.
Photo: Kylee Alons/Unsplash

by John McCracken
Investigate Midwest

In May, the Centers for Disease Control recommended that state public health departments, veterinarians and epidemiologists provide personal protective equipment, or PPE, for workers in direct contact with animals and their fluids, such as raw milk, that could be exposed to bird flu.

As of early December, almost 60 people have been infected with the virus, with the majority of cases stemming from human contact with dairy cattle. Nearly 700 dairy cattle herds have been infected.

The most effective way to protect workers is with face shields, latex gloves and respirators, the CDC advised.

However, records from 15 states with confirmed cases of bird flu in dairy cattle reveal inconsistent responses by agencies when it comes to providing farmworkers with personal protective equipment. Most state health agencies, which are often responsible for the human impacts of communicable diseases, have left PPE distribution to local county health officials.

The documents, which Investigate Midwest obtained through multiple public records requests, found:

  • At least a third of state health departments in states with confirmed dairy cattle outbreaks do not track the distribution of PPE.
  • Ohio, Wyoming and New Mexico, which have had active bird flu cases in dairy cattle, have either not tracked requests for farmworker PPE or are currently not accepting requests.
  • Only one dairy farm in Wisconsin, a major dairy state that has not had a confirmed cattle outbreak, has requested PPE from the state’s health department.
  • Minnesota has had few cases of bird flu in dairy cattle, but more than 200 agriculture businesses have received PPE from the state.
  • Michigan and North Carolina, which are also major dairy-producing states, have provided PPE to less than a dozen farms.

“It looks like a failure in how we’re communicating on the public health side to producers,” said Bethany Alcauter, director of research and public health for the National Center for Farmworker Health, a Texas-based nonprofit that provides resources and training to farmworkers and advocacy groups across the country.

Alcauter said farm operators and processors don’t have the same knowledge and outlook as public health officials because sick workers and animals are often part of the job.

“It’s not to say that they’re not getting sick, but because it’s maybe not that different from what they experience normally, it’s not going to change their perception of the risk just because it’s a different pathogen,” she said.


How dairy-producing states differ in providing PPE to workers during bird flu outbreaks

When dairy workers are milking cows, raw milk can come into contact with their hands, faces and bodies, increasing the risk of infection. The CDC advises that dairy workers wear PPE, including gloves, rubber overalls and face shields, to minimize the spread of the virus.

The Occupational Safety and Health Administration, OSHA, states that employers of workplaces where exposure to bird flu viruses could occur are responsible for providing PPE to workers and keeping records on infected animals and employees.

However, OSHA cannot enforce its standards on farms with less than 11 employees, an exemption that has harmed dairy workers in the past when dairy worker deaths and injuries went unreported. This makes the enforcement and responsibility of safety measures hard to pin down, Alcauter said.

“Workers are on their own in terms of actually enforcing anything,” she said.

Michigan and Colorado Workers Aren’t Using or Getting PPE

In a recent CDC study, the agency said that the prevention of human infections is critical to mitigating changes in the bird flu virus that could lead to a pandemic.

Employers can best reduce the risk of infection by providing and educating workers on the use of PPE, as well as monitoring and testing animals and workers for the virus, the study said.

While PPE is a needed tool to prevent the spread, the practical application can be hard for workers who are working long hours and completing repetitive motion tasks in tight corners and hot environments.

Every worker who contracted the virus has been tasked with cleaning and working in milking parlors, according to the study.

After surveying the predominantly Spanish-speaking workers at Michigan and Colorado dairies, the agency found that none of the workers who were infected with the virus reported using PPE. In fact, the use of PPE was low among all workers.

“This investigation identified low PPE adherence among dairy workers, which has been an ongoing challenge in hot, tight spaces where visibility around large animals is important and the use of eye protection can be challenging,” the study states.

Records obtained by Investigate Midwest show inconsistent PPE distribution processes in both Michigan and Colorado, where dairy industries have been wrestling with the virus since early this year.

From January 2023 to late September 2024, records show only 11 dairy farms requested PPE for farmworkers in Michigan. Only 16 other operations requested PPE from the state during this time.

Farms that have requested PPE from the state have had an average of nine farmworkers per dairy farm, according to the self-reported request forms, which Investigate Midwest received through its records requests.

Conversely, the handful of poultry farms that have requested PPE have an average of 60 farmworkers per operation.

In Colorado, 40 dairy farms have requested PPE from the state agency between the beginning of 2023 and September 2024, according to documents and interviews with the agency.

Most requests came over the summer when Colorado started seeing repeated outbreaks of bird flu at dairy operations. As of early December, the state has had 64 confirmed cases in dairy herds.

The average number of dairy farmworkers operating on Colorado dairy farms that have requested PPE was roughly 40 people per farm.

“Some farms also reported that they had already purchased PPE and therefore didn’t need to make a request,” David Ellenberger, a spokesperson for the Colorado Department of Public Health and Environment, CDPHE, wrote in an email to Investigate Midwest.

“Additionally, CDPHE has sent bulk orders of PPE to an agricultural workers outreach group, who has relationships with individual workers, and was able to further distribute PPE on an individual level,” Ellenberger added.

Texas, California Take Different Approaches

Earlier this year, Texas was the first state in the country to have a confirmed case of bird flu in dairy cattle and, soon after, became the second site of mammal-to-human transmission of the virus in the country.

Since then, Texas has had nearly 30 cases of bird flu in cattle.

The state’s department of health has eight regional offices and it instructs farmers to contact their local office to request PPE.

“Each region fills them as they come in,” Texas spokesperson Douglas Loveday told Investigate Midwest.

In California, which now leads the country in the number of confirmed dairy cattle cases, the health and agriculture departments do not track or manage the distribution of PPE to farms and affected facilities. This task is left to the state’s 58 local health agencies.

In an email, a California Department of Public Health spokesperson said the state supported a one-time distribution of PPE to dairy farms earlier this year. When local requests can’t be fulfilled, the state agency fulfills the request.

As of early December, the agency has fulfilled or is currently fulfilling 43 PPE requests from dairy farms, six from poultry farms and 11 from farmworker organizations.

A similar system is used in Iowa and Idaho, which have also had numerous cases of bird flu in dairy cattle.

Ken Gordon, Ohio Department of Health spokesperson, told Investigate Midwest that when bird flu was detected in northwest Ohio earlier this year, the state made PPE available as the USDA investigated the outbreak. The state received two requests for PPE from agricultural operations during that time.

Now that the farm is no longer being investigated, the state is no longer offering PPE to farmworkers upon request.

“The state-level Ohio Department of Health made PPE available, via the survey, to farms and agricultural businesses on a temporary basis as the situation was new and evolving,” Gordon said.

Other states have received few requests or do not track disbursements:

  • As of early December, only one Oklahoma farm had requested PPE from the state’s health department to manage bird flu. The state agency used to have a formal request process for PPE, but it has since closed. “The purpose of this program was to support farms as part of the immediate response until these farms were able to ascertain PPE on their own,” an Oklahoma State Department of Health spokesperson wrote in an email to Investigate Midwest. 
  • Idaho Department of Public Health spokesperson AJ McWhorter said the agency worked with the industry group Idaho Dairymen’s Association and local public health districts to identify dairy worker needs for equipment and filled a one-time request for PPE for dairy workers in June.
  • An Iowa health department spokesperson told Investigate Midwest they direct people to local agencies or to the U.S. Department of Agriculture. 
  • In Wyoming, a state with one confirmed affected dairy herd, the health department said it did not track PPE requests or make a request form available to producers. Wyoming Department of Health spokesperson Kim Deti said the state’s poultry and dairy industries are small and PPE requests have been taken on a case-by-case basis.
Few Farms in North Carolina, New Mexico and Wisconsin Request PPE

North Carolina has one confirmed case of dairy cattle infected with bird flu. The state has also seen numerous cases of infected poultry, which is a major industry in the state.

One farm and four farmworkers requested PPE from the state during the ongoing outbreak. The majority of the state’s requests for PPE have come from farmworker organizations and advocacy groups.

The Association of Mexicans in North Carolina requested 2,000 face shields for dairy workers, stating that the association will make PPE available through health fairs aimed at farmworkers and contractors and their families held across the state.

In New Mexico, a state with nine confirmed outbreaks in dairy cattle, only two farms have requested PPE, according to state health department spokesperson David Morgan.

Some major agricultural states are preparing for outbreaks, even if a confirmed case hasn’t been reported.

When dairy workers are milking cows, raw milk can come into contact with their hands, faces and bodies, increasing the risk of infection. The CDC advises that dairy workers wear PPE, including gloves, rubber overalls and face shields, to minimize the spread of the virus. graphic provided by the CDC

In Wisconsin, a major dairy-producing state, the state health agency has received 11 requests for PPE from the beginning of 2023 to September of this year. The state has yet to have a confirmed case of bird flu in dairy cattle or humans.

Only one Wisconsin dairy farm and one egg production company have requested protective equipment for employees.

Most of the state’s requests have come from cheese or dairy product manufacturers in the state, as well as veterinary offices.

In addition to workers on farms with dairy cattle, employees who work in dairy processing plants are at risk of exposure to the virus. The CDC states that employees on dairy and poultry farms, dairy processing plants and poultry slaughter plants, should receive PPE to prevent the spread.  The virus is destroyed when raw milk is pasteurized at a processing plant.

A spokesperson for Dairy Farmers of America, the country’s largest milk co-op and owner of nearly 50 dairy processing plants nationwide, told Investigate Midwest that the company has a safety protocol to provide PPE for workers at their plants.

DFA was not listed as a PPE recipient in the state of Wisconsin, where the company has three plants.

“PPE is (and was) standard protocol at our plants, prior to the bird flu, as many of our employees work around cleaning chemicals, “ a DFA spokesperson told Investigate Midwest in an email. “To date, we’ve had no requests for extra PPE.”

Wisconsin Department of Health Services spokesperson Elizabeth Goodsitt, said the agency has worked alongside the state’s agriculture department to provide updates about bird flu to producers, including information on how producers and industry groups can receive PPE.

“We know from our experience across public health that getting resources to agencies, organizations, and individuals who are most trusted by specific populations is the best way to share important information,” she said.

“Producers should continue to enhance their biosecurity efforts and monitor and control disease in their herds and flocks,” she said in an email to Investigate Midwest.

Minnesota Stands from the Rest

Minnesota’s Department of Public Health has fulfilled more than 200 requests for PPE since May despite the state having far fewer confirmed outbreaks in dairy cattle compared to its peers.

As of December, Minnesota has had 9 outbreaks in dairy cattle herds.

The majority of the state’s requests came from dairy producers, with 138 farms requesting. Twenty poultry farms requested PPE and nearly a dozen processing facilities, either dairy or poultry, requested equipment.


This story was originally published on Investigate Midwest. This article originally appeared in Sentient at https://sentientmedia.org/ppe-dairy-farm-workers-bird-flu/.

Investigate Midwest is an independent, nonprofit newsroom. Our mission is to serve the public interest by exposing dangerous and costly practices of influential agricultural corporations and institutions through in-depth and data-driven investigative journalism. Visit us online at www.investigatemidwest.org


Small farms disproportionately impacted by extreme heat according to recent study



Researchers say there's no silver bullet for mitigating the effects of heat stress on herds.


by Judith Ruiz-Branch
Illinois News Connection

CHICAGO - A new study shows how extreme weather conditions negatively affect production yields on Midwest dairy farms, with a disproportionate impact on smaller farms.

Researchers at the University of Illinois studied milk production records from nine Midwest dairy farmers. Considering both temperature and humidity when measuring extreme heat, they found farms lose about 1% of milk yield annually because of heat stress, while smaller farms lose closer to 2%.

Marin Skidmore, study co-author, said when cows are in extreme heat, it can cause increased restlessness and risk of infection, and decreased appetite, which reduces milk yield and impacts bottom lines.

"To some extent, it's only 1.6%. But if you're really making every dollar from your paycheck count, because you're living in a time with high costs, then 1.6% of your paycheck being gone in a given year is meaningful," she said.

The study predicts extreme heat days to be much more frequent in years to come and milk yield losses to increase about 30% in the next 25 years.

The Midwest tends to have smaller dairy farms compared with other states, with herds ranging from 100 to 200 cows. Researchers say being able to track and compare daily milk yields across a large region with similar climates has never been done before. Skidmore said their findings suggest that larger herds seem to have some level of protection to extreme heat compared with smaller farms, which start to see impacts of heat stress at lower thresholds.

"And this is additionally concerning in the context that we're studying because we've seen a lot of dairy farm exits over the last decade or two, and many of those are small farms," she added.

While researchers say there's no silver bullet for mitigating the effects of heat stress on herds, recommendations include adjusting feeding and calving timing, and using sprinklers and improved ventilation systems.

Skidmore emphasized the need for additional support for small farms since capital costs can be particularly constraining.

"Having the access to enough capital to make these really big investments is difficult, and grants or loans to help small farms adopt some of these management technologies could be one avenue to help small farms cope with heat stress and keep them competitive," she continued.

Skidmore said more research is also needed to explore other options to best manage extreme heat on dairy farms.




IDPH reported bird flu outbreak in Illinois flocks, here's what you should know


by Matt Sheehan
OSF Healthcare

PEORIA - Last month, the Illinois Department of Public Health (IDPH) has reported the state’s first bird flu cases in poultry flocks.

In a health advisory sent to long-term care (LTC) facilities, farm bureaus and local health departments, the IDPH reports large commercial poultry flocks in central and southern Illinois have recently tested positive for the H5N1 virus. Farm owners are now in the process of “de-populating” the birds.

Photo provided

Doug Kasper, M.D.
OSF Infectious Disease Specialist

Several counties in northern Illinois have reported events where many ducks and geese have died, referred to as “die-offs.” The reason LTCs received the notice is because many are located on retention ponds that attract waterfowl and wild birds.

No human cases have been reported in Illinois yet. But health officials continue to warn those who interact with potentially infected animals that if they don’t wear the proper personal protective equipment (PPE), they are at higher risk of developing the novel influenza A virus due to H5N1.

Doug Kasper, MD, an infectious disease specialist with OSF HealthCare, says bird flu has really hurt local American farms.

"Avian flu is a different strain of Influenza A. It's a strain that has been circulating in bird and cattle populations for over two years. It has been devastating to those populations, like poultry and dairy farms across the country," Dr. Kasper says. "What was unique was that in the calendar year 2024, was the first confirmed testing where the spread from an animal to a human occurred of this specific strain of influenza."

In early January, the Louisiana Department of Health reported the first-ever human bird flu death in the United States. The patient was reported to be over 65 years of age and had underlying medical conditions. The patient contracted H5N1 after exposure to sick and dead birds in a backyard flock.

Currently bird flu is only transmitted from animal to animal or animal to person. There have been no reported cases to have transmitted from human to human, but Dr. Kasper says there is always a concern about that possibility.

"Whenever there is an animal strain of infection that's not typically found in humans, we worry about the impact of if it were to cross over," Dr. Kasper says. "We've seen this with other infections throughout history. Even within COVID-19, there was the initial thought that it was an animal strain of infection."

The current flu vaccine does not protect against avian influenza, Dr. Kasper says.

"Each year the influenza vaccine, which is made up of three or four strains of influenza virus, is reexamined and matched up to a variety of factors to try and predict which strains will be most prevalent the next year," Dr. Kasper says. "Right now, avian flu cases in humans are so low that it doesn't warrant a different strain that would be much more likely to be found."

IDPH’s guidance to LTCs is to have residents tested for the flu if they are suspected of having acute respiratory illness. Don’t touch dead or sick birds, only trained staff in appropriate PPE should handle with caution.

"The average person who does not interact with poultry or dairy farms is at very low risk of avian flu," Dr. Kasper says.

There is concern that bird flu could enter the food production and distribution across America. This is why the United States Department of Agriculture (USDA) is closely monitoring dairy and poultry farms, to try and limit any possible contamination of dairy, meat or poultry products.

The bird flu continues to be rarely seen in humans, as only 67 cases (as of January 15) have been reported by the Centers for Disease Control and Prevention. Most cases have been mild, Dr. Kasper says.


Read our latest health and medical news


Flesh-eating maggots reappearing in the U.S, farmers brace for impact on livestock



A fly that was once wiped out in the U.S. is back. Screwworm flies return in Mexico and pose a risk to U.S. farms. If untreated, animals die in weeks from flesh-eating maggots.

Air National Guard C130 in flight
DiGiFX Media from Pixabay

A USDA study estimated that a screwworm outbreak could cost Texas alone nearly $2 billion each year. The US government plans to fight the pest from the air by dropping billions of flies over Texas and other states where the larvae has been detected.


SNS - The hum of the cargo plane’s engines was steady but distant, drowned beneath the weight of anticipation. Dr. Lena Mireles leaned against the cool fuselage, eyes fixed on the pale glow of morning rising over the Gulf of Mexico. Below them, a swath of farmland, scrub brush, and winding rivers awaited the release. Behind her, row after row of aluminum canisters held billions of sterile male flies — tiny, winged soldiers bred in a lab, irradiated, and readied for war against a flesh-eating parasite that once again threatened to crawl northward.

She tapped her tablet, reviewing the flight path as the countdown ticked closer. In just minutes, the belly doors of the aircraft would open, scattering the living payload across the borderlands of southern Texas and northern Mexico. The plan was simple, almost elegant: drown the wild screwworm population in a tide of infertile mates. But Lena knew it wouldn’t feel elegant if they failed. The New World screwworm was already burrowing into livestock flesh in Chiapas and Campeche. If it crossed into U.S. herds, the economic and ecological damage would take decades to undo.

The cabin lights dimmed as the pilot radioed clearance. Lena stepped closer to the viewing port, watching the earth spin slowly beneath them. It was strange, she thought, to fight something so ancient with something so engineered. The flies would be gone in days, their work done in silence. No guns, no poison — only radiation, instinct, and time. Yet the stakes couldn’t be higher. This wasn’t just pest control. This was containment. Survival. A race between biology and biotechnology, she was flying at 12,000 feet over the front line yet again.

This sounds like a scene from a made-for-Netflix science-fiction movie, right? Actually, billions of irradiated male flies will soon rain from airplanes over southern Texas and northern Mexico as the U.S. government accelerates efforts to contain the alarming resurgence of the New World screwworm — a parasitic fly species that threatens livestock, wildlife, and food security across North America. This scenerio might actually happen in the years ahead.

The plan, announced this week by the U.S. Department of Agriculture (USDA), represents the latest escalation in a long-running battle against a pest that was once eradicated from the United States but has now breached containment lines and advanced to within 500 miles of the U.S.-Mexico border.

The U.S. government is preparing to drop billions of flies from airplanes over southern Texas and northern Mexico to stop the screwworm. This flesh-eating fly lays eggs in animals' wounds, and its maggots eat living flesh. If not treated, the infestation can be fatal in just two weeks.

A swarm of flies feasting
Photo: Babs Müller/Pixabay

The United States plans to drop billions of flies in the southern US to stop the return of flesh-eating screw worm maggots.

The U.S. Department of Agriculture (USDA) is using this strategy to stop the insect from spreading into the United States. The pest was once eliminated from North America, but in recent years, it has returned, moving north through Central America and into Mexico.

The economic and health risks are growing, especially in Texas, where cattle populations are the highest in the country. Officials are increasing efforts to contain the spread before it reaches U.S. herds.

What is the New World Screwworm?
The New World screwworm (Cochliomyia hominivorax) is a type of fly that attacks warm-blooded animals. Female flies lay eggs in open wounds or body openings. When the eggs hatch, the maggots dig into living tissue. As more larvae grow and feed, the wounds get larger and deeper. Untreated, this infestation can lead to death.

This parasite affects livestock, pets, wildlife, and people. Animals that have given birth, had surgery, or have open wounds are most at risk.

The adult fly is slightly larger than a housefly, with orange eyes, a metallic blue-green body, and three dark stripes on its back. Maggots can often be seen in wounds, and animals may act restless, stop eating, or isolate themselves.

Eradicated before, but now it’s back
The U.S. removed screwworm from the country in 1966 using a process called the Sterile Insect Technique (SIT). This method involves releasing large numbers of male flies that have been sterilized using radiation. These sterile males mate with wild females, but no larvae hatch. Over time, this lowers the pest’s population.

SIT worked well for decades. A biological barrier was created in Panama to stop the screwworm from moving north again. But in 2023, that barrier was broken. Since then, screwworm has spread through Central America and into Mexico.

New scientific models show that screwworm is most likely to enter the U.S. through southern Mexico. Areas with warm climates and large livestock populations, such as Texas and Florida, are at the highest risk. The fly can travel up to 12 miles to find a host.

Cold weather limits its survival, but summer weather and the movement of animals or wildlife can carry the pest into new regions, including northern states.

Serious threat to farmers and the economy
Texas has about 12.5 million head of cattle — the largest number in the country. A USDA study estimated that a screwworm outbreak could cost Texas nearly $2 billion each year. This number includes lost livestock, lower meat and dairy production, higher veterinary costs, and labor shortages during an outbreak.

If the pest spreads to other states, the economic damage could rise even more. Past outbreaks, such as the one in 1976, required a large number of workers to manage. Today, there are fewer workers in agriculture, making it harder to handle a crisis.

The screwworm is also a threat to food supply chains and public health. The pest does not only harm farm animals — deer, wild hogs, pets, and even humans are at risk.

What the U.S. is doing now to fight back
To prevent an outbreak, the USDA is building a new sterile fly factory in southern Mexico, expected to open in July 2026. Until then, a fly distribution center in southern Texas will help deliver sterile flies from an existing factory in Panama.

Sterile flies will be dropped from airplanes over high-risk areas in Texas and Mexico. The goal is to stop wild screwworms from reproducing by filling the environment with sterile males. This method is safer for the environment than chemical spraying and only targets screwworms.

At the same time, Texas has begun forming state response teams to monitor and respond to new cases. These efforts are focused on protecting livestock and keeping the pest from crossing into U.S. herds.

Livestock in Texas are threatened by NSW
Photo: Kylee Alons/Unsplash
Response teams focusing on protecting livestock will monitor herds in Texas, hoping to block the spread of screwworm swarms.

Early signs and what to watch for
Farmers and veterinarians are key to spotting screwworm early. Watching animals closely is the best way to catch an infestation before it spreads.

Common signs include:

  • Foul-smelling wounds with visible maggots
  • Animals licking or biting at their wounds
  • Lesions at dehorning or branding sites
  • Unusual behavior such as restlessness or not eating

By the third day after infestation, there may already be hundreds or thousands of maggots in a wound. If untreated, the wounds grow deeper and cause major damage.

Government agencies and agricultural groups are sharing guides and training materials with farmers to help identify and report possible cases quickly.

A Race against time
The reappearance of the New World screwworm shows how quickly old threats can return. While the USDA and its partners work to stop the pest, experts warn that control will take time and constant effort. Warmer months increase the risk of spread, and infected animals can quickly spread the larvae across large areas.

While the method of dropping sterile flies is proven and safe, it works slowly. It requires months - sometimes years - of regular releases to lower populations. But doing nothing is not an option. Without action, the pest could take hold again in the U.S., harming animals and causing long-term economic loss.

Stopping the screwworm now may save American farmers and ranchers billions in the future.


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