E. coli O157:H7 Prevention Guide for San Diego Food Service

Sanitation Protocols & Cross-Contamination Prevention

E. coli O157:H7 thrives in raw beef and can transfer to other foods through cross-contamination. The San Diego County Health Department requires separate cutting boards, utensils, and storage areas for raw and ready-to-eat foods. All food contact surfaces must be cleaned with hot water and sanitizer (200 ppm chlorine or equivalent) after every use, and surfaces must be inspected for visible contamination before sanitizing. Implement color-coded cutting boards: red for raw meat, green for produce, and yellow for poultry. Staff must wash hands for at least 20 seconds with soap and warm water after handling raw beef, using the restroom, or touching contaminated surfaces—handwashing is the single most effective control measure per CDC guidance.

Temperature Control & Cooking Standards

Ground beef must reach an internal temperature of 160°F (71°C) to destroy E. coli O157:H7; whole cuts require 145°F (63°C). San Diego food service establishments must use calibrated thermometers (checked quarterly) to verify doneness at the point of service. Use meat thermometers in at least two locations per patty or portion to ensure uniform cooking. Ground beef that will be held for service must be maintained at 135°F (57°C) or above in hot-holding equipment with verified thermostat readings documented daily. Refrigerate raw beef at 41°F (5°C) or below and use within 3 days; frozen beef must be thawed in refrigeration, never at room temperature. Train staff to reject any ground beef product that appears pink or undercooked.

Employee Health Screening & San Diego Health Department Compliance

The San Diego County Health Department requires employees who handle food to report gastrointestinal symptoms (diarrhea, vomiting, abdominal cramps) immediately and be excluded from work until symptom-free for 24 hours without medication. E. coli O157:H7 can persist in asymptomatic carriers and infected employees are a major transmission route; implement a documented exclusion policy and train managers to enforce it. Conduct initial food handler certification training (ServSafe or equivalent) and annual refresher training focused on pathogen prevention. Maintain health screening logs per CDPH requirements. Establish a protocol to notify local health authorities if a foodborne illness outbreak is suspected, and ensure staff understand that E. coli O157:H7 cases must be reported to San Diego County Public Health Services within 24 hours of diagnosis.

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