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Yes, in fact mayonnaise can only be made with raw eggs.
In doing research online about this, it seems that store bought mayo, like Hellmans, is fine because the eggs used are pasturized. SO go ahead and eat. However, you shouldn't make home-made mayo (who does?) and should also avoid any softcooked or raw eggs.
Raw eggs could contain Salmonella, but it is relatively rare.
If they are cooked no, but if you touch them raw, yes.
Yes, it needs to be refrigerated after opening. It is mainly raw eggs and oil. It is shelf stable prior to opening.
When preparing foods such as Caesar salad dressing or mayonnaise for high-risk populations, a key practice is to
Mayonnaise Cream, Salad Cream and Raw Eggs/Chicken are probably the worst foods for growing Salmonella.
Only if it doesn't contain any raw fish or raw eggs.
Depends on what you make them out of. The healthiest sandwiches would contain - whole-grain bread - lean meats - eggs - vegetables (tomato, lettuce, cucumber, raw spinach) Unhealthy sandwiches would contain - white bread - butter or margarine - mayonnaise - fatty meats (pepperoni, salami) - deep-fried meats
Raw eggs can contain salmonella, which is killed off during cooking. The same applies to chicken, and obviously, they're related!
Raw egg whites.
Due to the contents of Mayo (mostly the creams and raw eggs), it is hazardous to keep mayo if the jar has gone warm for longer then an hour.