Shigella Prevention Guide for Dallas Food Service Operations

Employee Health Screening & Hand Hygiene Protocols

The Dallas Health Department requires documented health screening for all food handlers, with particular attention to gastrointestinal illness symptoms like diarrhea—a primary indicator of Shigella infection. Employees must report illness immediately and are restricted from food preparation for 24 hours after symptom resolution per Dallas Food Code requirements. Hand washing stations must be equipped with warm running water, soap, and single-use towels; staff must wash hands for 20 seconds after restroom use, before handling ready-to-eat foods, and after touching contaminated surfaces. Implement twice-daily hand hygiene audits and post visible reminders in food prep areas to enforce compliance.

Sanitation & Cross-Contamination Prevention

Shigella survives on surfaces for 48+ hours, making environmental sanitation critical. The Dallas Health Department mandates separate cutting boards and utensils for raw and ready-to-eat items, with color-coded systems to prevent cross-contamination. Clean and sanitize all high-touch surfaces—sinks, faucets, door handles, and prep tables—at minimum every 4 hours using EPA-approved sanitizers at proper concentrations (typically 200 ppm for quaternary ammonium or 100 ppm for chlorine). Ensure restrooms have hot water, soap dispensers, and paper towels; Shigella spreads quickly from restroom contamination to food contact surfaces. Document sanitation activities daily with timestamps and staff initials for Dallas Health Department inspections.

Temperature Control & Monitoring Best Practices

While Shigella is destroyed at 160°F (71°C), the primary risk lies in ready-to-eat foods that receive no cooking. Dallas Health Department standards require holding hot foods above 135°F and cold foods below 41°F, verified with calibrated thermometers checked twice daily. Raw produce handling is critical—wash all vegetables and fruits under running potable water and keep separate from raw meats to prevent Shigella transfer. Implement a digital temperature monitoring system to alert staff of deviations in real-time, and maintain logs for compliance documentation. Train staff to recognize Shigella risks in high-turnover, high-volume environments where illness can escalate quickly.

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