Fetta is one of those hard to pick ones. If you are desperate, look for an Australian Fetta that is prepackaged. Steer clear of the ones in the window as you don't know how well they have been cared for and ofen the assistants can't tell you where it is from. Something interesting to note is that if you eat a lot of soft cheese and deli foods it is possible that you have already had listeria and have the antibodies to fight it anyway, but I think we are all in the same boat in that we would rather not risk it.