My darling wife had to call an 800 number on Saturday to check on some ground beef she’d purchased at TJs. She was relieved to find out she wouldn’t have to throw away a gallon of already-made chili but our good fortune might not extend to you. If you purchased ground beef in the second half of September and put it away in the freezer for future use you could have an issue. This Washington Times article has more details about what you should look out for and the Trader Joe’s site has exact identification. If you have any stored ground beef make sure to check the WT article – it lists some stores whose names don’t jump out at me but that doesn’t mean there isn’t one around.
You can make your own decisions, but personally I don’t sweat e coli issues in ground beef. I use a meat thermometer and check to see that it’s 160F so I don’t need to worry.