The danger is not limited to eggs that appear dirty or damaged. Contamination may be present even when the shell looks completely clean.
Raw eggs are also sometimes used in homemade mayonnaise, Caesar salad dressing, hollandaise sauce, mousse, tiramisu, and homemade ice cream.
These foods can be risky when prepared with ordinary unpasteurized eggs because the eggs may not receive enough heat to destroy harmful bacteria.
Pasteurization offers a safer alternative. Pasteurized eggs are treated using a controlled process designed to reduce or eliminate harmful microorganisms while maintaining their usefulness in recipes.
For dishes that require raw or lightly cooked eggs, choosing pasteurized eggs or pasteurized egg products is an important precaution.
This is especially relevant for older adults, pregnant women, young children, and people with weakened immune systems.
The idea that raw eggs are automatically healthier is not supported by a strong food safety argument. Their nutritional benefits do not justify ignoring the potential contamination risk.
2. Leaving Eggs Outside the Refrigerator for Too Long
Another common mistake is leaving eggs on the kitchen counter for extended periods.
Some households place eggs in a bowl near the cooking area because they are used frequently. Others leave a carton on the counter after shopping and forget to refrigerate it.
Temperature matters because bacteria can multiply more quickly under unsuitable storage conditions.
In the United States, commercially processed shell eggs are generally required to be refrigerated. The FDA recommends storing them promptly at 40°F (4°C) or below.
The USDA advises consumers not to leave refrigerated eggs at room temperature for more than two hours, or one hour when the surrounding temperature exceeds 90°F (32°C).
A particularly important issue occurs when cold eggs are repeatedly exposed to warmer air.
Condensation can form on the shells, and temperature changes may increase the risk of bacterial movement through the shell's protective barriers.
For this reason, eggs that have been refrigerated should remain refrigerated rather than repeatedly moving between cold and warm environments.
There is an important regional distinction, however.
Egg handling systems differ between countries. In some places, commercial eggs are washed and refrigerated, while other systems use different production and storage practices.
Consumers should follow the storage instructions and food safety requirements applicable to the eggs they purchase.
The simplest approach is to follow the package instructions and maintain a consistent storage temperature.
3. Cooking Eggs Too Lightly
Soft-boiled eggs, sunny-side-up eggs, and runny scrambled eggs are popular breakfast choices.
Their texture and flavor appeal to many people. However, eggs that remain undercooked may present a higher risk of foodborne illness.
The problem is that harmful bacteria can survive when food does not receive sufficient heat.
The FDA recommends cooking eggs until both the white and yolk are firm. Scrambled eggs should not remain runny under its general consumer safety guidance.
Dishes containing eggs, such as casseroles, should reach an internal temperature of 160°F (71°C).
This is particularly important when preparing food for people who are more vulnerable to severe infections.
A healthy young adult may recover from Salmonella infection without serious complications, but the same infection can be much more dangerous for an older person or someone with a weakened immune system.
People who enjoy soft yolks do not necessarily need to abandon them completely. However, they should understand the additional risk and choose pasteurized eggs when preparing dishes that remain raw or lightly cooked.
For vulnerable individuals, thoroughly cooked eggs are the safer everyday option.
4. Washing Eggs Before Storing Them
Many people believe that washing eggs before putting them in the refrigerator makes them safer.
The intention is understandable. Eggs come from farms, and their shells may carry dirt or other material.
However, washing eggs at home is not always recommended.
Commercial egg-processing systems in countries such as the United States use controlled washing and sanitizing procedures. Washing eggs again at home may damage their natural protective coating or introduce contamination if the process is not handled correctly.
The water temperature and handling method also matter.
In some countries, eggs are sold without the same washing process and may have different storage instructions. Consumers should therefore follow local food safety guidance rather than applying one country's rules everywhere.
For ordinary household use, the safer approach is to select clean eggs, avoid cracked shells, and keep them properly stored.
If an egg is visibly dirty, damaged, or contaminated, it is better not to take unnecessary risks.
It is also important to wash hands after handling raw eggs, even if the shells appear clean.
5. Using Cracked Eggs Without Checking Their Condition
A small crack in an eggshell may seem harmless.
Some people believe that if the egg does not smell bad, it is still safe to eat.
Unfortunately, a damaged shell can provide an easier route for bacteria to enter.
The shell acts as a physical barrier, and its protective structures help prevent microorganisms from reaching the contents.
Once the shell is cracked, that protection is compromised.
This is why the FDA recommends checking cartons before purchasing eggs and avoiding eggs with cracked shells.
A cracked egg should not be treated as safe simply because its contents look normal.
The safest approach is to discard eggs that are cracked before use rather than attempting to rescue them through additional cooking.
If an egg cracks accidentally during transport, food safety guidance may allow it to be broken into a clean covered container and refrigerated for prompt use. However, this is different from purchasing eggs that have already been damaged or leaving them unrefrigerated.
When there is uncertainty about how long an egg has been cracked or how it was handled, discarding it is the more cautious choice.
6. Reusing the Same Utensils for Raw and Cooked Eggs
Cross-contamination is one of the easiest food safety mistakes to overlook.
Imagine preparing scrambled eggs.
You crack several raw eggs into a bowl, use a fork to mix them, and then place the cooked eggs back into the same bowl without washing it.
The cooked food may become contaminated by bacteria from the raw mixture.
The same problem can happen with plates, chopping boards, countertops, kitchen towels, and cooking utensils.
Even if the eggs have been cooked thoroughly, placing them on a contaminated surface can introduce harmful microorganisms afterward.
This is why food safety specialists recommend keeping raw and cooked foods separate.
Use clean utensils for cooked food, wash preparation surfaces thoroughly, and clean equipment that has come into contact with raw eggs.