Should eggs be refrigerated

In an effort to keep bacteria's production slowed, the answer would be "yes". However, there are some countries that do not.

Actually, outside the USA, farm fresh eggs are rarely refrigerated and sold off the shelf in stores. Why? Because eggs that are fresh and have not been washed still have a protective shell or skin on them. Remember that a hen sits on the eggs for around 20 days or almost three weeks and eventually out pops a little chick. Does bacteria grow and contaminate the chick? No.

If they are washed and that protective skin is removed, or if they have been refrigerated ever, then yes, refrigerate them. Farm fresh, room temperature eggs, so say many naturalists, are far better for positive nutrition benefits than those bought in refrigerated grocery store cartons.