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Onions Linked to McDonald’s E. Coli Outbreak: Is Beef Production Safe?


Nebraska has found itself in the spotlight recently due to a concerning E. coli outbreak linked to onions in McDonald’s hamburgers. While federal officials have finally traced the source to a farm in Colorado, questions about safety in our food production processes linger, especially concerning beef production.

This outbreak has tragically resulted in at least one death and has left dozens of others feeling the effects. Just this week, key federal agencies wrapped up their investigation, confirming that the contamination stemmed from these onions, effectively ruling out burger patties as the culprits. Yet, food safety experts are raising alarms about the potential risks posed by bacteria in manure from factory farms and how it can infiltrate produce operations.

Prashant Singh, an associate professor specializing in health, nutrition, and food science at Florida State University, shed light on the precarious relationship between livestock and produce farming operations. He pointed out that, “Manure, if not processed correctly in large operations, can spill over into areas where fresh produce is grown.”

Specifically, contaminated dust from concentrated animal feeding operations can settle on lettuce fields or enter irrigation canals, raising serious concerns. In a related incident, a California carrot company was forced to issue a voluntary recall due to another E. coli outbreak, highlighting the troubling proximity of carrot farms to factory farms.

Singh emphasized that while meat production has surged due to advancing technology and is regulated by the U.S. Department of Agriculture, produce safety is overseen by the Food and Drug Administration, which lacks comparable resources. “On the FDA side, they lack everything. Their hands are very full,” Singh remarked.

Despite this resource disparity, food safety advocates have pointed out that the meat lobby has heavily influenced regulations to avoid stricter oversight from the USDA. Existing laws are often limited in scope, and alarmingly, data from the Centers for Disease Control and Prevention revealed nine multistate foodborne illness outbreaks in just 2024.

This story is based on original reporting.

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