Should hands be washed after touching the outside of an egg shell?(UK)
Yes. When I was researching raw egg yolks for sauces, I discovered that salmonella lives mainly on outer shells, and less often in the yolk. So washing eggs with detergent before using egg yolks surely prevents troubles, and washing your hands after handling them would be common sense anyway in a kitchen. I am pretty sure however that not washing your hands in a private situation would never give you food poisoning. But if you handle hundreds of eggs and afterwards make a, say, mayonnaise using many egg yokes, that risk would be considerably higher.