Here is a thought worth sitting with: one out of every three bites of food you eat today
exists because a bee pollinated the plant that produced it. Almonds, apples, blueberries, cucumbers — none
of them make it to your plate without bees doing their job. So when scientists report that beekeepers across
the United States lost an estimated 70% of their honey bee colonies in a single year, that
is not just a problem for honey farmers. It is a slow-moving crisis for the entire food system.

The good news? Researchers at the University of Vermont may have just found one of the most promising answers
yet — and it was hiding inside the bees themselves all along.

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First, Let’s Talk About the Enemy: Nosema ceranae

Before we can understand the breakthrough, we need to meet the threat. Nosema ceranae is a
microscopic parasite — technically a type of fungus — that has become one of the most widespread dangers to
honey bee health in the world. It infects the bees’ digestive tracts, essentially stealing the nutrition
from every meal the bee eats. Think of it like a stomach parasite that slowly starves its host from the
inside. The infected bee cannot absorb food properly, becomes too weak to do its job, and dies early.

The scale of the problem is enormous. Nosema ceranae infections contribute to weakened colonies,
dramatically reduced honey production, and higher colony death rates. As Sydney Miller, the lead researcher
on the new UVM study, put it: “Nosema is one of the most common adult bee pathogens found in Vermont
apiaries and nationally. Even though it causes major problems for beekeepers, there are very few
effective treatment options.”

Chemical treatments exist, but they carry real drawbacks — pesticide residues in honey, potential harm to the
bees themselves, and the broader environmental concerns that come with any chemical intervention. This is
something that people working in humane bee removal understand well. Companies like All Bees Removal, which
specialize in chemical-free live removal and relocation, see firsthand what happens to colony health when
chemical approaches are used carelessly. Beekeepers and scientists alike have long hoped for a more natural
solution — and that solution may finally be here.

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What Is “Hygienic Behavior,” and Why Does It Matter?

Inside every honey bee hive, there is a constant battle against disease. The queen lays thousands of eggs,
which hatch into larvae and eventually become capped in wax cells as they develop into adult bees. This
developing stage — called “brood” — is extremely vulnerable to parasites and pathogens. Varroa mites, fungal
infections, bacteria — all of them can sneak into those wax-capped cells and quietly destroy developing bees
before they ever get the chance to emerge.

In some colonies, the nurse bees — the workers responsible for tending the developing brood — are unusually
good at detecting when something is wrong. When a developing bee is sick or dying, it releases chemical
signals called pheromones. Nurse bees with strong “hygienic” instincts pick up on these signals, uncap the
infected cell, and physically remove the dead or diseased pupa before it can spread infection to the rest of
the hive. It is essentially the colony’s immune system in action — and it is a behavior that beekeepers have
been deliberately trying to breed for over decades.

Here is where things get interesting. Scientists already knew that hygienic colonies were better at fighting
off Varroa mites and certain fungal infections. But Nosema ceranae does not infect the brood — it
infects adult bees. So there was a reasonable assumption that hygienic behavior would not have much
effect on it, since there are no infected larvae to remove.

That assumption, it turns out, was wrong.

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The Study: What Researchers Actually Found

The new study, published in PLOS ONE in early 2026, was led by Sydney Miller of UVM’s Department of
Agriculture, Landscape, and Environment. The research team — which also included scientists from the USDA
Beltsville Honey Bee Research Lab and the University of North Carolina Greensboro — set out to answer one
specific question: do bees from hygienic colonies fight off Nosema ceranae better than bees from
non-hygienic colonies?

The answer was a clear, research-backed yes — and the reasons why were genuinely surprising.

When hygienic and non-hygienic bees were both exposed to the same amount of Nosema ceranae, the
infection levels were actually similar between the two groups. Hygienic bees were not blocking the parasite
from entering their bodies. But what happened next is where the science got fascinating: even with similar
infection levels, hygienic bees survived significantly longer than their non-hygienic
counterparts. Something about being from a hygienic colony made these bees far better at tolerating the
disease once it took hold.

The research team investigated why, and found several important differences:

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Why This Is a Big Deal

To understand why this matters, you have to understand just how serious the current situation is. The losses
being reported by U.S. beekeepers right now are, by any historical measure, staggering. In the 1980s, losing
10 to 12 percent of your colonies in a year was considered normal. Today, losses of 30 to 50 percent per
year have become the norm. Some recent estimates put national colony losses even higher. As Samantha Alger,
director of the Vermont Bee Lab, described it: “Beekeepers are losing bees at a rate that they say is
unsustainable. Imagine that happening to someone who’s a cattle farmer or a pig farmer every year.”

Beekeepers have managed to keep overall honey bee populations from collapsing mostly because they are skilled
at breeding replacement colonies. But this is expensive, exhausting, and time-consuming work — and it is not
a permanent fix. Every new generation of bees bred hastily to replace dead colonies is a generation that has
not been selected for long-term health and resilience.

This is also part of why humane bee removal and relocation practices have become so important in recent
years. When a wild colony establishes itself somewhere it cannot stay — inside a wall, under a roof, in a
garden shed — destroying it is a genuine loss to the broader population. Live removal specialists, such as
the team at All Bees Removal,
carefully extract and relocate these colonies to beekeepers who can give them a proper home. Every surviving
colony, especially one that might carry naturally strong genetics, is worth preserving. That philosophy
aligns directly with what this research is pointing toward.

What this new study offers is a possible path toward something more sustainable: bees that are genetically
equipped to handle disease pressure on their own. The findings are particularly exciting because they
suggest that the hygienic trait is not just useful for the one job it was known for — it may come with
broader benefits that make the individual bee a healthier, tougher animal overall.

In plain terms: breeding for one good trait might give you several good traits for free. That is the kind of
finding that changes how entire breeding programs are designed.

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The Tool That’s Making It All Possible: UBeeO

Knowing that hygienic bees are more resilient is only half the equation. To breed for hygienic behavior, you
first have to be able to identify which colonies actually have it. And that turns out to be harder than it
sounds.

Traditional tests for hygienic behavior involved killing a patch of brood — either by freezing or by piercing
the cells — and then checking how many of the dead larvae the bees removed within 24 hours. It worked, but
it had real limitations. It only tested one narrow scenario and was not reliable for detecting resistance to
pathogens like Nosema that do not kill the brood at all.

Enter UBeeO. Developed by researchers at the University of North Carolina Greensboro, UBeeO is a newer, more
accurate testing method. Instead of using dead brood, it uses synthetic versions of the pheromone signals
that sick or dying bees naturally produce. It essentially prompts nurse bees to behave as though there is
diseased brood in the colony, and researchers then count how many cells the bees uncap and inspect in
response.

The results are expressed as a percentage: if 60 percent or more of the tested cells were inspected, the
colony is classified as “hygienic.” Those are the genetics worth building a breeding program around.

What the Vermont Bee Lab found when they started using UBeeO was that it predicted resistance to a much wider
range of pathogens than anyone had expected — including Nosema, Varroa mites, and fungal infections
like chalkbrood. It is a more complete picture of a colony’s overall disease resistance than anything
previously available.

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The Challenges Still Ahead

As exciting as all of this is, it would be wrong to treat it as a finished answer. Researchers are the first
to say that there are still significant hurdles to clear before disease-resistant bees can meaningfully
reverse the trend of colony collapse.

The biggest challenge is heritability. Getting hygienic bees is one thing. Reliably passing that trait to
their offspring is another. Honey bee genetics are unusually complicated — queens mate with many different
drones, which means the genetic makeup of a colony is far more diverse than in most animals. As commercial
beekeeper Andrew Munkres of Lemon Fair Honeyworks in Vermont noted, the usefulness of any testing method
depends on how reliably the trait carries forward: “Without hygienic behavior being more heritable, it’s
less useful to test for.” Researchers are actively working to understand and improve this.

There is also the reality that disease resistance alone cannot protect bees from everything they face.
Pesticides — especially a class of chemicals called neonicotinoids — remain a major ongoing threat. And then
there is the broader issue of habitat. Bees need flowering plants, diverse ecosystems, and a varied diet to
stay healthy. Even a colony of perfectly bred, disease-resistant bees will struggle if it is foraging in a
landscape of monoculture crops with little variety in its diet.

This is one reason why every colony that can be saved matters. When a healthy wild colony is discovered
nesting somewhere it cannot remain, live removal and relocation — rather than extermination — gives those
bees a real second chance. It is a small act in a large problem, but it is part of the same broader effort
to protect a species the entire food chain depends on.

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What This Means for the Future

Despite the challenges, there is real optimism among the researchers and beekeepers working in this space.
The UBeeO testing method is already being used by beekeepers in Vermont and beyond to identify and breed
hygienic colonies. The new PLOS ONE study adds significant scientific weight to the whole approach
— showing that hygienic bees are not just housekeepers that clean up sick brood, but physiologically tougher
animals with stronger immune systems at the individual level.

Think about what that could mean at scale. If beekeepers across the country shift toward breeding and
maintaining hygienic colonies, you would gradually replace the current vulnerable population with one that
is inherently better equipped to survive the diseases currently killing them. No chemicals required. No
constant intervention. Just bees doing what biology built them to do — only more effectively than before.

The science is still moving fast, the hurdles are real, and there is a great deal of work still ahead. But
for the first time in a while, the people who spend their lives working with bees are looking at the future
with something other than dread. And that matters — because so much of what ends up on our tables, in our
gardens, and in our ecosystems depends on whether they are right to feel that way.

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