Preventive biosecurity investment and poultry performance across contrasting production contexts

Every farm that raises chickens operates on a delicate balance between keeping the birds healthy and keeping the people working there safe. For decades, the rules for preventing disease on these farms have been viewed through a narrow lens: a set of strict hygiene rules meant to keep germs out. Farmers were often told to treat these safety measures as a necessary cost of doing business, like paying a utility bill, rather than as a smart investment that could actually help the farm grow. This perspective overlooked a crucial reality: the same fences, hand-washing stations, and protective gear that stop a virus from entering a coop also protect the farm workers from breathing in dangerous dust or coming into contact with harmful pathogens. When a farm prioritizes quick, short-term output over these permanent safety structures, it leaves itself vulnerable to outbreaks that can wipe out entire flocks and endanger the people who care for them.

The question facing modern agriculture is how to move beyond seeing safety as just an expense. Researchers wanted to know if spending money on these preventive measures actually leads to better results for the farm's bottom line and the well-being of its workers, and whether this relationship holds true for both small family farms and massive industrial operations. To answer this, a team of scientists looked at poultry farms in two very different worlds: the small, semi-commercial operations of Rwanda and the high-tech, fully commercial facilities of Israel. They treated biosecurity not as a checklist of rules, but as a measurable investment, asking if putting more resources into these safety structures correlates with higher egg and meat production and safer working conditions.

The researchers gathered data from 197 poultry farms, a group split between 156 small-scale operations in Rwanda and 41 large commercial farms in Israel. They did not just ask the farmers what they did; they walked the farms with physical checklists to verify the presence of specific safety features. They looked for things like secure perimeter fences, dedicated areas for washing hands and boots, separate units for isolating sick birds, and the availability of protective clothing for workers. They also tracked how much money the farms spent on these physical structures and how many hours were dedicated to planned preventive maintenance. By combining these observations into a single score, they created a clear picture of how intensely each farm invested in preventing disease before it ever started.

The results showed a stark divide between the two types of farms. The commercial farms in Israel were vastly larger, housing an average of over 8,600 birds, compared to the Rwandan farms which averaged just under 275 birds. The Israeli farms also spent significantly more on infrastructure, with an average capital cost of roughly $209 per unit, while the Rwandan farms spent about $78. These differences extended to the outcomes as well. The commercial farms achieved a market yield efficiency of nearly 45 percent, meaning they produced close to half of what was theoretically possible given their flock size and genetics. In contrast, the smallholder farms in Rwanda averaged a yield of only about 15 percent. Similarly, the workers on the commercial farms had a hazard protection score of 15 percent, reflecting standardized safety protocols, while the workers on the small farms scored just under 5 percent.

Despite these massive differences in scale and resources, the study found a strong statistical association between the overall model of biosecurity investment and farm performance, though the specific drivers were complex. The analysis revealed that the regression model, which included biosecurity intensity and production context, explained nearly 48 percent of the variation in how efficiently farms produced their market yield. However, the study noted that the specific effect of biosecurity intensity alone was not statistically significant in isolation for yield, suggesting that the relationship is heavily influenced by the structural differences between small and large farms rather than a simple linear increase in spending. The connection to worker safety was even more pronounced in the model, which explained nearly 63 percent of the variance in hazard protection. In this specific domain, the data showed a statistically significant main effect for biosecurity investment intensity (p=0.027), but the negative coefficient indicates that the relationship is not a straightforward positive link where more investment automatically equals better safety in all contexts. Instead, these findings suggest that biosecurity investments function as part of a broader structural system; without a foundational baseline of infrastructure, isolated investments may not yield the expected productivity or safety benefits, and the observed patterns reflect deep-seated operational differences between the two production environments.

However, the researchers were careful to note that this relationship is not a simple magic switch. While the data showed a strong association in the overall model, the study did not find that the rate of improvement was statistically different between the small farms and the large ones. This means that while both types of farms benefit from these investments, the small farms in Rwanda face a structural hurdle. Because they start with such limited resources and lower baseline infrastructure, simply adding a single safety feature often does not yield an immediate, measurable jump in production. The study suggests that these farms need a foundational level of structural support before small, incremental investments begin to pay off in terms of productivity. It is only once a farm reaches a certain threshold of basic safety infrastructure that additional spending on biosecurity acts as a highly effective insurance policy, protecting both the economic output and the human workforce.

The findings challenge the old idea that biosecurity is just a cost to be minimized. Instead, the evidence points to it being a form of active capital allocation, similar to how a factory might invest in better machinery to increase output, but with the caveat that the returns are highly dependent on the existing farm structure. For the small-scale farmers in Rwanda, the study highlights that they are currently trapped in a cycle where a lack of capital prevents them from building the very structures that would make their farms more productive and safer. The researchers recommend that financial support and extension programs should focus on helping these smallholders make step-by-step upgrades to their infrastructure. By treating biosecurity as a foundational investment rather than a reactive expense, the agricultural sector can potentially unlock higher yields and safer working environments across all types of farming systems, from the smallest backyard coops to the largest industrial complexes.