Gram Research analysis shows that two proteins in chicken droppings—calprotectin and C-reactive protein—increase 5 to 10 times higher when chickens develop necrotic enteritis, a serious bacterial disease. A 2026 study of 276 broiler chickens found these fecal proteins could serve as noninvasive biomarkers for early disease detection, potentially replacing invasive diagnostic methods currently used by farmers.
Researchers found a simple way to detect a serious chicken disease called necrotic enteritis by testing their droppings instead of doing invasive procedures. The study of 276 chickens showed that two proteins in feces—calprotectin and C-reactive protein—increase dramatically when chickens get sick with this bacterial infection. These proteins act like alarm signals that the chicken’s body is fighting inflammation. This discovery could help farmers catch the disease earlier and keep their flocks healthier, since the test is noninvasive and can be done on many birds at once.
Key Statistics
A 2026 research article of 276 broiler chickens found that calprotectin (MRP-126) concentrations increased approximately 5-fold in healthy chickens fed an inflammatory diet and 10-fold in chickens with necrotic enteritis compared to healthy controls.
According to research reviewed by Gram, C-reactive protein (CRP) levels in chicken feces increased significantly in birds with necrotic enteritis, with the largest increases observed in chickens with the most severe intestinal damage (scores 2-3).
A 2026 study demonstrated that fecal acute-phase proteins could distinguish between different disease severity levels in broiler chickens, with protein concentrations correlating directly to the extent of intestinal inflammation and bacterial infection.
The Quick Take
- What they studied: Whether proteins found in chicken poop could be used as early warning signs of a serious intestinal disease called necrotic enteritis, which is caused by bacteria.
- Who participated: 276 male broiler chickens (the kind raised for meat) were divided into four groups: healthy chickens on normal feed, healthy chickens on inflammatory feed, chickens with one intestinal infection, and chickens with two intestinal infections.
- Key finding: Two proteins in chicken droppings—calprotectin and C-reactive protein—increased 5 to 10 times higher in sick chickens compared to healthy ones, with the biggest increases in birds with the most severe disease.
- What it means for you: If you raise chickens, this test could help you spot disease early by simply collecting droppings instead of needing a veterinarian to examine dead birds. However, this research is still preliminary and needs testing in real farm conditions before it becomes a standard tool.
The Research Details
Scientists divided 276 young broiler chickens into four groups to compare how their bodies responded to different conditions. One group stayed healthy on normal feed, another stayed healthy but ate feed designed to trigger inflammation, a third group got infected with a parasite, and the fourth group got infected with both a parasite and bacteria that cause necrotic enteritis. On day 21, the researchers collected droppings from the chickens and measured two special proteins that the body makes when fighting inflammation and infection. They used laboratory tests called ELISAs (a standard scientific method) to measure exact amounts of these proteins in the droppings.
The researchers chose to measure proteins in droppings because it’s noninvasive—meaning they didn’t have to hurt the chickens or kill them to get samples. This is much better than the current method, which requires killing birds and examining their intestines by hand. The study was carefully designed so that each group experienced different levels of disease, allowing researchers to see how protein levels changed as disease got worse.
All the data was analyzed using statistical tests to make sure the differences they found were real and not just by chance. They considered results significant only if the probability of them happening by accident was less than 5%.
Current methods for detecting necrotic enteritis in chickens are problematic because they require killing birds and having an expert look at their intestines—a process called necropsy. This is expensive, slow, and subjective (different people might score the damage differently). A noninvasive test using droppings could be done on many birds at once, giving farmers real-time information about disease in their flocks. This matters because early detection means farmers can treat the problem faster, reduce bird suffering, and prevent economic losses.
This was a controlled laboratory study with a reasonable sample size (276 birds) and clear experimental groups. The researchers used validated laboratory methods (commercial ELISA tests) to measure proteins, which are objective and reproducible. However, this was a single study conducted under controlled conditions, not in real farm environments. The study only measured proteins at one time point (day 21), so we don’t know how these proteins change over time. Before this test could be used on farms, it would need to be validated in real-world conditions with different chicken breeds and farm management practices.
What the Results Show
The study found that calprotectin (also called MRP-126), a protein made by immune cells, increased about 5 times higher in healthy chickens eating inflammatory feed compared to healthy chickens on normal feed. When chickens had the bacterial disease (necrotic enteritis), calprotectin increased about 10 times higher than in completely healthy birds. The increases were even larger in chickens with the most severe intestinal damage (scores 2-3 on a damage scale).
C-reactive protein (CRP), another inflammation marker made by the liver, showed similar patterns. It also increased significantly in sick chickens, though the exact numbers weren’t fully detailed in the results. Both proteins increased in a predictable way—the sicker the chicken, the higher the protein levels.
These findings suggest that measuring these two proteins in chicken droppings could reliably identify which birds have the disease and how severe it is. The proteins appear to be sensitive enough to detect even mild inflammation, making them potentially useful for early detection before birds show obvious signs of illness.
The study also showed that the inflammatory diet alone (without infection) caused some increase in these proteins, suggesting that diet quality affects immune markers in chickens. This is important because it means the test could help identify not just disease, but also nutritional or management problems that trigger inflammation. The research demonstrated that these proteins can distinguish between different levels of disease severity, which could help farmers decide when treatment is needed.
This research fills an important gap because very few studies have looked at using fecal proteins as disease markers in chickens. Most previous work on acute-phase proteins in poultry focused on blood samples, which require invasive blood draws. This study’s approach of using droppings is novel and more practical for farm use. The protein changes observed are consistent with how these proteins behave in other species when fighting infection and inflammation, which supports the findings’ credibility.
This study was conducted in a controlled laboratory setting with young chickens all of the same breed and age. Real farms have older birds, mixed ages, different breeds, and different management practices that could affect results. The researchers only collected samples at one time point (day 21), so we don’t know how these proteins change as disease develops or recovers. The study used only 64 samples for protein analysis out of 276 birds, which is a smaller subset. Additionally, the study didn’t test whether the fecal protein test could work as well as current diagnostic methods in practical farm settings. More research is needed to confirm these findings work in real-world conditions.
The Bottom Line
This research suggests that measuring calprotectin and C-reactive protein in chicken droppings could be a useful tool for detecting necrotic enteritis, but it’s still too early to recommend it as a replacement for current diagnostic methods. The evidence is strong that these proteins increase with disease (high confidence in the laboratory findings), but the practical application on farms needs more testing (low-to-moderate confidence for farm use). If you raise chickens, stay informed about this research, but continue using current diagnostic methods recommended by your veterinarian until this test is validated for farm conditions.
This research is most relevant to large-scale broiler chicken producers who raise thousands of birds and want early disease detection. It’s also important for poultry veterinarians, animal health researchers, and feed companies. Small backyard chicken keepers probably won’t benefit from this test in the near future since it requires laboratory equipment. Consumers who buy chicken meat should care because better disease detection could mean healthier flocks and safer food.
If this research leads to a practical farm test, it would likely take 2-5 years of additional validation studies before it becomes available. Once available, farmers could potentially identify sick birds within days rather than waiting for visible symptoms to appear. The actual benefits (fewer sick birds, faster treatment) could be seen within weeks of implementing the test on a farm.
Frequently Asked Questions
Can you test for chicken diseases using poop instead of killing the bird?
Yes, according to 2026 research, measuring proteins in chicken droppings can detect necrotic enteritis without harming birds. Calprotectin and C-reactive protein increase 5-10 times in infected chickens, making them useful noninvasive biomarkers for disease detection.
How accurate is the fecal protein test for detecting chicken disease?
Laboratory testing showed the proteins reliably increased with disease severity in controlled conditions. However, the test hasn’t yet been validated on actual farms with different chicken breeds and management practices, so real-world accuracy remains unknown.
What are acute-phase proteins and why do they increase when chickens are sick?
Acute-phase proteins are substances the liver and immune cells produce during inflammation and infection. They’re part of the body’s defense system. In sick chickens, these proteins increase dramatically as the immune system fights bacterial infection, making them useful disease indicators.
When will farmers be able to use this fecal protein test on their chickens?
The test is still in research stages and needs validation in real farm conditions before becoming commercially available. This typically takes 2-5 years of additional studies. Farmers should continue using current diagnostic methods recommended by veterinarians.
Why is detecting necrotic enteritis early important for chicken farmers?
Early detection allows farmers to treat disease faster, reduce bird suffering, prevent flock-wide outbreaks, and avoid significant economic losses. Current methods require killing birds for diagnosis, making early detection difficult and expensive.
Want to Apply This Research?
- If you raise chickens, track fecal sample collection dates and any disease symptoms observed in your flock. Record the date samples are sent to a lab and when results come back, noting which birds or groups tested positive for elevated inflammation markers.
- Set up a weekly routine to collect fresh droppings from different areas of your chicken coop and store them properly for testing. Use the app to schedule these collections and set reminders to send samples to a diagnostic lab when you suspect disease.
- Create a long-term tracking system in the app that records fecal test results over time for your flock. Compare results to bird health observations, feed changes, and environmental conditions to identify patterns that predict disease outbreaks before birds show obvious symptoms.
This research describes laboratory findings in controlled conditions and has not yet been validated for use in real farm settings. The fecal protein test described is not currently available as a commercial diagnostic tool. Farmers should continue working with licensed veterinarians for disease diagnosis and treatment. This information is for educational purposes only and should not replace professional veterinary advice. Always consult with a poultry veterinarian before making health management decisions for your flock.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.