Shigella Prevention for Chicago Food Service Operations

Chicago Department of Public Health (CDPH) Requirements

The Chicago Department of Public Health requires all food service establishments to comply with the City of Chicago Food Code, which incorporates FDA guidelines for Shigella prevention. Food handlers must report gastrointestinal symptoms—including diarrhea, vomiting, and abdominal cramps—to management immediately, and symptomatic employees cannot work in food preparation. CDPH mandates that establishments maintain documentation of employee health declarations and require exclusion of infected workers for at least 24 hours after symptom resolution without antibiotics. Additionally, any suspected Shigella outbreak must be reported to CDPH within 24 hours of identification.

Common Shigella Sources in Food Service

Shigella primarily spreads through infected food handlers with poor hand hygiene, contaminating ready-to-eat foods including salads, sandwiches, and fresh produce. Contaminated water used in food preparation or irrigation of raw vegetables represents a secondary risk, especially for leafy greens and berries sourced from regions with water quality issues. Cross-contamination occurs when infected handlers touch food preparation surfaces, utensils, or ready-to-eat items without washing hands after restroom use. Illinois produce suppliers are subject to FDA Produce Safety Rule inspections, but Chicago establishments must also verify supplier compliance through third-party certifications and supplier documentation.

Prevention Protocols and Hygiene Standards

Establish mandatory handwashing stations in food preparation and restroom areas, requiring staff to wash hands with soap and warm water for at least 20 seconds after restroom use, before handling food, and after touching hair, face, or contaminated surfaces. Implement a health screening policy requiring employees to disclose any GI symptoms and prohibiting sick staff from food handling duties; consider requiring medical clearance before returning to work after confirmed Shigella infection. Separate raw produce from ready-to-eat foods using dedicated cutting boards and utensils, sanitize all food contact surfaces regularly with approved sanitizers, and maintain temperature logs for refrigerated produce. Train staff quarterly on Shigella transmission and provide written guidelines in English and Spanish reflecting Chicago's diverse workforce, and maintain records of all training sessions for CDPH inspections.

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