By Jelani James WATCH RELATED VIDEO Submit No one knows what's causing the ongoing listeria outbreak, and Trader Joe's and Costco in the Sacramento area have now opted to err on the side of caution and recall all products that may be contaminated with the bacteria. Advertisement © 2017 HNGN, All rights reserved. Do not reproduce without permission. Advertisement 0 COMMENTS CLOSE COMMENT Get HNGN's Top Stories Newsletter Everyweek You have already subscribed. Thank you.