Eggs are among the most versatile foods in any kitchen, but they carry specific food safety risks that every consumer should understand. Safe egg handling requires inspecting eggs for cracks before purchase and discarding any cracked eggs immediately, storing eggs in the refrigerator at or below 4°C (40°F) at all times in the United States and other countries where eggs are commercially washed, cooking eggs until both the white and yolk are firm to eliminate Salmonella risk, using pasteurized eggs in recipes that call for raw or lightly cooked eggs, washing hands and all surfaces that contact raw egg thoroughly, never leaving cooked egg dishes at room temperature for more than two hours, and understanding that Salmonella contamination can exist inside intact uncracked eggs. The USDA and FDA both classify eggs as a potentially hazardous food requiring careful temperature management from farm to table.
Understanding egg safety protects your family from one of the most common sources of foodborne Salmonella infection.
Egg safety begins at the store. Choosing the right eggs and inspecting them before purchase eliminates the most obvious contamination risks before you bring them home.
Open the carton and inspect every egg before placing it in your cart. Look for cracks, even hairline fractures that are barely visible. Cracked eggs allow bacteria to enter through the shell and should never be purchased. If you discover a cracked egg after purchase, discard it rather than trying to use it quickly.
Check the sell-by or expiration date on the carton. In the United States, the USDA requires a pack date (a three-digit Julian date) on all USDA-graded eggs. Eggs are typically safe to use for three to five weeks after the pack date when properly refrigerated, regardless of the sell-by date printed on the carton.
Purchase eggs from refrigerated cases only. In the United States, Canada, Australia, and Japan, commercially sold eggs are washed during processing, which removes the natural protective cuticle and requires continuous refrigeration. In the European Union and United Kingdom, eggs are not washed and can be sold at room temperature, but should be refrigerated at home for maximum shelf life.
Choose eggs from reputable retailers with proper cold chain management. Eggs displayed in a warm area of the store or in a case that does not feel cold may have experienced temperature abuse that accelerates bacterial growth.
How you store eggs at home directly affects how long they remain safe to eat and how effectively you prevent Salmonella growth.
Store eggs in the refrigerator at or below 4°C (40°F) as soon as you arrive home from the store. Do not leave eggs at room temperature for more than two hours, or one hour if the ambient temperature exceeds 32°C (90°F).
Keep eggs in their original carton rather than transferring them to the egg tray in your refrigerator door. The carton protects eggs from absorbing odors from other foods through their porous shells, and the refrigerator door is the warmest part of the refrigerator due to frequent opening and closing.
Store eggs on a middle or lower shelf in the refrigerator where temperatures are most consistent. Place the carton away from strong-smelling foods like onions, fish, and garlic, as egg shells are semi-permeable and can absorb surrounding odors.
Hard-boiled eggs should be refrigerated within two hours of cooking and consumed within one week. Store them in a covered container. Peeled hard-boiled eggs dry out faster and should be stored in a covered container with a damp paper towel.
Proper cooking is the most reliable way to eliminate Salmonella from eggs. Understanding what constitutes a fully cooked egg versus a potentially risky preparation helps you make informed choices.
The FDA recommends cooking eggs until both the white and yolk are firm. For fried eggs, this means cooking until the white is completely set and the yolk begins to thicken. For scrambled eggs, cook until no visible liquid egg remains. For omelets, cook until the egg is firm throughout with no runny portions.
Egg-based casseroles and dishes containing eggs mixed with other ingredients should reach an internal temperature of 72°C (160°F) as measured by a food thermometer. This includes quiches, frittatas, stratas, and baked egg dishes.
Poached eggs and soft-boiled eggs with runny yolks are popular preparations that do not fully eliminate Salmonella risk. The CDC notes that Salmonella can survive in runny yolks. If you choose to eat soft-cooked eggs, understand the risk, and consider using pasteurized eggs for these preparations.
Eggs reach safe temperatures quickly because of their small size. A fried egg reaches safe temperature in approximately four to five minutes on medium heat. Hard-boiling requires approximately 12 minutes in boiling water for large eggs.
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Try it free →Many popular foods contain raw or lightly cooked eggs, creating Salmonella risk that consumers should be aware of and manage appropriately.
Homemade mayonnaise, Caesar dressing, hollandaise sauce, tiramisu, mousse, and eggnog traditionally use raw eggs. These dishes pose Salmonella risk unless made with pasteurized eggs. Commercial versions of these products are made with pasteurized eggs and are safe, but homemade versions using regular shell eggs carry risk.
Pasteurized shell eggs are heated to a temperature sufficient to destroy Salmonella without cooking the egg. They are available at most grocery stores and look identical to regular eggs. The USDA recommends pasteurized eggs for any recipe that calls for raw or lightly cooked eggs, especially when serving young children, elderly individuals, pregnant women, or immunocompromised persons.
Pasteurized liquid eggs (sold in cartons) are another safe alternative for recipes requiring raw eggs. These products have been heat-treated to eliminate pathogens and can be used in any recipe calling for raw eggs.
Cookie dough and cake batter containing raw eggs should not be consumed raw. The CDC identifies raw flour as an additional hazard in these products, as flour can contain E. coli. Both the raw egg and raw flour components create risk.
Understanding how Salmonella contaminates eggs helps you appreciate why proper handling matters and why certain populations face elevated risk.
Salmonella Enteritidis can infect the ovaries of healthy-looking hens and contaminate the interior of eggs before the shell forms. This means that even intact, uncracked eggs with clean shells can contain Salmonella. The USDA estimates that approximately one in 20,000 eggs may contain Salmonella internally.
Salmonella on the exterior of egg shells comes from contact with hen feces in the laying environment. In the United States, commercial egg processing includes washing and sanitizing to remove exterior contamination, but the washing also removes the natural cuticle, requiring subsequent refrigeration.
Symptoms of Salmonella infection from eggs include diarrhea, fever, abdominal cramps, and vomiting, typically appearing 6 to 72 hours after consuming contaminated food. Most healthy adults recover without treatment within four to seven days, but the infection can be severe or fatal in vulnerable populations.
High-risk groups for severe Salmonella illness include children under five years old, adults over 65, pregnant women, and individuals with weakened immune systems. These groups should avoid runny eggs, raw egg preparations, and any dish where eggs are not fully cooked.
The float test provides a rough freshness indicator: place the egg in a bowl of water. Fresh eggs sink and lie flat on the bottom. Older eggs stand upright but still touch the bottom. Eggs that float have significant air cell expansion indicating age and should be discarded. However, this test does not detect Salmonella — a fresh-looking egg can still be contaminated.
Shell color has no relationship to food safety, nutritional value, or quality. Brown and white eggs come from different breeds of hens and carry identical food safety considerations. Choose eggs based on freshness, proper refrigeration, and intact shells rather than color.
Eggs stored continuously at or below 4°C (40°F) are typically safe to eat for three to five weeks after purchase, often beyond the printed sell-by date. Use the float test and a visual and smell inspection. If the egg smells normal when cracked open and the white and yolk appear normal, it is likely safe to cook and eat. Discard any egg that smells sulfurous or looks abnormal.
Blood spots (also called meat spots) are caused by a blood vessel rupturing during egg formation. They are not an indication of contamination or fertilization. Eggs with blood spots are safe to eat when properly cooked. You can remove the spot with a knife tip if it is aesthetically unappealing.
Egg safety comes down to simple habits: inspect before buying, refrigerate immediately, cook thoroughly, and use pasteurized eggs for raw preparations. These practices protect your household from Salmonella while letting you enjoy eggs in all their versatility.
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