That's because your probably were getting eggs straight from the farm.its the crap they feed them, offal, heads, feet etc are all ground up and mixed in the feed, poultry lacks the ability to metabolize it.
I remember when it was safe to store eggs unrefrigerated, today the salmonella is already in the egg when its laid.
Store eggs from large suppliers are washed and refrigerated ergo must continue to be refrigerated.
Farm fresh eggs never refrigerated and not washed do not need to be refrigerated.
Salmonella was always in/on the eggs. It is nothing new and has nothing to do with what they are being fed.