Bad Eggs: Avoiding Salmonella in the Shell


Unpasteurized eggs can carry Salmonella. Learn how they should be handled to help avoid an issue with your customers.

As a foodservice operator, it’s important to know that some foods are more likely than others to become unsafe to serve or consume. These foods are known as TCS foods, because they require time and temperature control for safety (TCS stands for Time/Temperature Control for Safety). These controls are necessary to prevent harmful pathogens from developing on foods with certain characteristics that promote growth, including moisture, protein and a neutral or slightly acidic pH.

Shell eggs that are not treated to eliminate nontyphoidal Salmonella (the most common form of Salmonella), aka unpasteurized eggs, are a TCS food because Salmonella enteritidis (Salmonella associated with eggs) can grow on the outside of the egg. Once a contaminated shell is broken, Salmonella could spread to the egg yolk and white.

Symptoms of Salmonella include nausea, vomiting, abdominal cramps, diarrhea, fever, chills, headache and blood in the stool. Every year Salmonella enteritidis causes an estimated 7,500 foodborne illnesses in Canada, which results in an average of 925 hospitalizations and 17 deaths.

You can help prevent spreading egg-related Salmonella to your customers by:

  • Avoiding serving food and drinks that contain raw eggs

  • Washing hands, kitchen work surfaces and utensils with soap and water immediately after they have been in contact with raw eggs, and then disinfecting surfaces with a sanitizing agent

  • Keeping eggs refrigerated at or below 4°C (41°F) at all times

  • Cooking eggs and egg-based foods to an internal temperature of at least 74°C (165°F) to ensure they are safe to eat

  • Discarding cracked or dirty eggs

  • Using pasteurized, in-shell eggs, especially with high-risk populations including the young, the elderly and those with weakened immunity

  • Cooking pooled eggs immediately after mixing or storing them at or below 4°C (41°F), and cleaning and sanitizing containers before making a new batch

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