Preventing Shigella contamination by food workers

Why a small lapse can contaminate many servings

Shigella spreads when microscopic fecal material reaches another person’s mouth, often through contaminated hands, food, or water. CDC has linked foodborne Shigella outbreaks to infected food workers who stayed on the job while sick, skipped handwashing after using the restroom, or directly handled ready-to-eat foods.

A worker can contaminate a large number of portions while assembling salads, sandwiches, fruit, or garnishes. The food may look normal and receive no later cooking step. This is why employee-health reporting and handwashing are operational controls, not paperwork exercises.

The employee-health response begins with reporting

The Food Code requires food employees and conditional employees to report specified symptoms, diagnoses, and exposures to the person in charge. Shigella is among the reportable diagnoses addressed in the FDA model code. The person in charge must apply the relevant exclusion or restriction criteria and notify the regulatory authority when the code requires it.

A manager should make the rule easy to use: train employees on which symptoms and diagnoses to report, provide a private way to contact a supervisor, and ensure coverage so a sick worker is not pressured to remain on shift. Do not ask employees to diagnose themselves or conceal a confirmed diagnosis; follow the local code and health authority direction.

Exclude, restrict, and reinstate under the adopted code

Exclusion means the worker is kept out of the food establishment or work area as the applicable rule specifies. Restriction means the worker cannot perform duties that could transmit contamination, though some other duties may be permitted. The correct measure depends on symptoms, diagnosis, the type of establishment, and whether highly susceptible populations are served.

The FDA model code contains specific reinstatement criteria for diagnosed employees. The 2026 edition updated certain laboratory-test language, and local adoption may differ. Managers should use the code version in force, follow regulatory-authority approval requirements when specified, and document the decision. CDC’s general advice about staying home after diarrhea is useful public-health guidance, but it does not replace Food Code reinstatement rules.

Handwashing after restroom use

Employees must wash hands after using the toilet and before returning to food work, then wash again at each other required moment. A complete wash uses the designated handwashing sink, soap, friction, rinsing, and drying according to the adopted Code. Gloves do not make a restroom-to-prep transition safe without handwashing.

Keep hand sinks accessible, stocked, and reserved for handwashing. Do not place dirty utensils, produce, or mop buckets in the basin. Supervisors should watch actual practice during busy service; a sink that is blocked by boxes or has no soap turns the written rule into a failure.

Protect ready-to-eat food

Use utensils, deli tissue, or properly changed gloves for exposed ready-to-eat food when bare-hand contact is prohibited. Avoid touching the food with hands, then touching handles or other surfaces with the same gloves. If a glove becomes contaminated, remove and discard it, wash hands, and put on a clean glove before restarting.

Separate tasks and tools. Keep raw foods away from ready-to-eat items, and clean and sanitize food-contact surfaces between operations. Shigella can travel through contamination routes that are invisible, so the manager should control hand contact, workflow, and sanitation rather than relying on visual inspection.

Cleaning after a suspected illness event

If a worker vomits or has diarrhea in the establishment, follow the written cleanup procedure and Food Code requirements for bodily-fluid events. Restrict access to the contaminated area, use appropriate protective equipment, clean and disinfect with products used according to their labels, and dispose of contaminated materials safely. Food, utensils, and food-contact surfaces in the affected area may require disposal or additional cleaning.

The restaurant’s sanitizer is not automatically an appropriate disinfectant for a bodily-fluid event. The product label must support the use and required contact time. The person in charge should know where the cleanup kit and written procedure are before an incident occurs.

Respond to a customer or employee case

When a suspected Shigella illness is reported, record the date, symptoms, work schedule or dining date, menu items, and contact details as permitted by the investigation process. Stop serving implicated foods when directed, preserve supplier and batch records, and cooperate with public health officials. Avoid making statements that identify a cause before investigators assess the evidence.

If an employee is diagnosed, follow the applicable code and the regulatory authority’s instructions about exclusion, notification, and return to work. Review handwashing, restroom access, glove practices, and staffing. Correct the underlying conditions, not merely the single shift’s schedule.

Exam focus

The exam distinction is that Shigella is a reportable pathogen linked to infected food workers, fecal-oral spread, and ready-to-eat foods. The person in charge applies the Food Code’s employee-health controls; handwashing and preventing bare-hand contamination are central.

Do not use one generic “48 hours” rule as a substitute for the current code’s diagnosis-specific criteria. Do not allow a worker to return solely because they feel better if the code requires public-health or regulatory approval. First identify the adopted code version, establishment type, symptoms or diagnosis, and role.

Make illness reporting workable on every shift

A written rule is useful only if an employee can follow it without losing a shift for raising a concern. Tell workers who to call when the manager is off site, how to report symptoms privately, and who can cover a food-prep station. Keep contact information for the regulatory authority with the illness policy. Supervisors should respond consistently so employees learn that reporting is expected and taken seriously.,Use observation as coaching rather than a substitute for the reporting system. Confirm that hand sinks are reachable, stocked, and not used for dumping or utensil storage. Watch handwashing after restroom breaks and task changes, then correct gaps immediately. If schedules make breaks or coverage difficult, change the staffing plan; a time-pressure problem can become a food contamination pathway.