E.coli and lettuce Archives

May 19, 2025June 19, 2025

A CFMs Guide to the 2025 Romaine Lettuce and E. Coli

In the ever-evolving landscape of food safety, staying informed about current risks is a critical responsibility for every Certified Food Protection Manager. As we navigate 2025, it’s crucial to understand the ongoing concerns surrounding romaine lettuce and E. coli contamination. Recent events have underscored the need for heightened diligence in our sourcing and handling procedures to protect public health effectively.

The persistence of pathogens in leafy greens requires that we, as industry leaders, remain proactive. This means we must be exceptionally thorough in our safety protocols. However, you’re in luck! This guide provides an overview of the current situation, highlights specific risks, and offers actionable steps for your establishment.

Understanding the Recent Romaine Lettuce and E. coli Outbreak

A significant, though not widely publicized, E. coli O157:H7 outbreak linked to romaine lettuce occurred in late 2024.

The incident led to:

Nearly 100 illnesses across 15 states
36 hospitalizations
Tragically, one death

While federal agencies concluded their investigation in early 2025, the lack of a broad public announcement has left many food safety professionals seeking clarity. Specifically, this event serves as a powerful reminder that leafy greens remain a high-risk food category. Additionally, the CDC has previously estimated that over half of all E. coli O157:H7 illnesses originated from vegetable row crops, such as lettuce.

Why it matters: Undisclosed outbreaks mean that contaminated products could have been handled in facilities without staff being aware of the specific risk, reinforcing the need for consistent, universal precautions.
Lack of transparency: The decision not to name the specific producer involved in the 2024 outbreak makes complete traceability challenging for on-the-ground managers.
Historical Context: This is not an isolated issue. Between 2009 and 2018, the U.S. and Canada saw 32 confirmed or suspected E. coli outbreaks linked to leafy greens, demonstrating a persistent vulnerability in the supply chain.

The Elevated Risk of Pre-Cut and Processed Lettuce

However, as a CFSM, it’s vital to recognize that the risk is not uniform across all types of lettuce. Health experts and scientific studies indicate an increased risk associated with pre-bagged and chopped lettuce products. The physical act of chopping or tearing leaves creates more entry points for pathogens and releases plant juices that can act as a nutrient source for bacteria.

Cellular Damage: Research has shown that E. coli populations can multiply significantly more on damaged or cut lettuce leaves compared to intact ones. One study found pathogen growth was over 10 times higher on shredded lettuce than on whole leaves.
Regulatory Classification: Because of these risks, the FDA classifies pre-cut, washed, and packaged leafy greens as a “Potentially Hazardous Food (PHF)” that requires strict time and temperature control for safety (TCS).
Cross-Contamination Potential: Centralized washing and processing of large batches of lettuce means that if one head is contaminated, the pathogens can easily spread to the entire lot.

Proactive Safety Measures for Your Establishment

Given the current concerns, every food service establishment must reinforce its safety protocols for leafy greens. Complacency is the enemy of food safety. As a manager, you are the first line of defense in preventing foodborne illness. Implement and rigorously enforce the following procedures. Here are some tips to reduce romaine lettuce and E. coli outbreaks:

Verify Your Source and Inspect Deliveries: Work closely with your suppliers to understand their safety protocols and procedures. Upon delivery, meticulously inspect all leafy greens. Reject any shipments that are not properly refrigerated. This means cut greens must be 41°F or below. Additionally, it includes lettuce with signs of damage, wilting, or decay.
Enforce Strict Handling and Preparation Rules:

Washing: Wash whole heads of lettuce thoroughly under clean, running water before they are cut. Do not re-wash products that are packaged and labeled as “ready-to-eat.“
Cross-Contamination: Use dedicated, sanitized cutting boards, knives, and utensils for all produce to prevent contact with raw meat or other contaminants.
Hygiene: Ensure all staff follow impeccable handwashing procedures before and after handling produce.
Prioritize Temperature Control: The moment lettuce is chopped or cut, it must be maintained at or below 41°F to inhibit bacterial growth. Regularly monitor and log temperatures in your storage units to ensure compliance and safety.

The role of a Certified Food Protection Manager extends beyond daily operations. It’s about creating a culture of safety and vigilance. These recent outbreaks with romaine lettuce and E. coli are a clear signal that we must continuously refine our standards.

Protect your customers and your reputation. If you and your team need to renew your credentials or achieve initial certification, consider our personalized 8-hour food manager courses. Safe Food Training offers expert, instructor-led options tailored to the specific needs of professionals in Minnesota. Book your continuing education or initial certification training now.

October 21, 2019October 4, 2019

Food Safety Training and Further Study Into E.coli Contaminated Romaine

New Study Into E.coli Contaminated Romaine

E.coli outbreaks linked to romaine from Arizona made headlines on multiple occasions over the past two years. The link between E.coli and romaine has been the most talked-about story in the food safety training community, and the causes of the outbreaks still continue to be investigated. Now, academia has gotten involved as researchers from the University of Arizona have partnered with the FDA on a multi-year study of E.coli contaminated romaine from one of the growing regions linked to past outbreaks.

Goals of an Extended Study of E.coli Contaminated Romaine Growing Regions

Due to the massive scale of the previous outbreak, food safety officials and growers alike are eager to get to the bottom of why outbreaks happen and how to prevent them in the future. The extension scientists from the University of Arizona have a few goals in mind with this extended study.

Assess potential sources of contamination
Examine the prevalence of contaminates from one growing season to the next
To provide recommendations for advanced food safety training

There have been numerous theories as to how E.coli has made its way into the Yuma growing fields. Contaminated water, poorly cleaned harvesting equipment and even flies have been suggested as a cause of recent outbreaks. Hopefully, researchers can isolate a cause and help prevent the transfer of pathogens in these fields again.

One of the advantages of a multi-year examination is that researchers will be able to see what happens from one season to the next. This could help identify whether this is an ongoing issue with the region that requires drastic action or if previous outbreaks were due to isolated incidents. Once these issues are addressed, these researchers and the FDA hope to have extensive food safety training recommendations for romaine producers in Arizona and throughout the agricultural community around the country.

Do you think there’s been enough effort put into examining the link between romaine growing regions and E.coli outbreaks?

March 18, 2019March 17, 2019

Findings of FDA Report on Romaine Lettuce Recalls

Recent major recalls of romaine lettuce have increased the concern certified food protection managers have for putting romaine on their menus and calls into question the future of this crispy green lettuce as a staple in the industry. In mid-February, the FDA report on romaine lettuce concluded its research into the latest recall of E.coli contaminated lettuce and was able to not only trace the source of the contaminated romaine, but also the likely method of contamination.

FDA Report on Romaine Lettuce Linked to E.coli Contamination

The FDA has traced the origin of contaminated lettuce to a farm in Santa Barbara County, CA. More specifically, the FDA report on romaine lettuce has discovered an unsanitized water reservoir with traces of the same strain of E.coli that was used by several ranches in the community. The water from this reservoir is the mostly likely cause of contamination causing food-borne illness across the nation. E.coli can into contact with lettuce during rinsing after harvest or during harvest by coming into contacted with harvesting equipment that had been washed with contaminated water.

Now that we have this information from the FDA report on romaine lettuce, it brings up two questions:

Why such a massive recall if the outbreak can be traced back to one specific growing area?
How can certified food protection managers use this information to keep their product safe?

The answer to the first one is simple; there is no efficient method to trace the source of contaminated produce. There are numerous farms and ranches that produce romaine lettuce, and with so many major producers and buyers, the process of tracing back a single head, case or major supply can often take time. Restaurant suppliers purchase their lettuce from numerous sources, so the romaine you receive on a Tuesday can come from one part of California while Friday’s shipment originates in another or even New Mexico. The CDC and FDA simply have to err on the side of caution when it comes to issuing warnings and recalls for any major product.

Finally, and unfortunately, when it comes to E.coli and lettuce, the only recourse food safety managers have is to throw out recalled product and alter their menus in the event of an outbreak. Rinsing lettuce will not one-hundred percent remove E.coli from any produce product.

With such a large amount of lettuce suppliers, do you think any tracking system of contaminated product is possible, or will major nationwide recalls become the norm?