Pistachios are being recalled due to an outbreak of salmonella in nine states. The Centers for Disease Control and Prevention announced that eleven people fell sick; two were hospitalized. Pistachios from Paramount Farms, Trader Joe's, and Wonderful are under recall. The CDC's full list of products and UPC codes can be found here. 

From the FDA:

Consumers may return these products to Wonderful Pistachios for a refund by sending the product back or bottom portion of the package that contains the lot code (see photo below) to Wonderful Pistachios, 13646 Hwy 33, Lost Hills, CA 93249. If consumers prefer, they may return the product to the store from which it was purchased for a refund. Consumers should discard the nuts prior to returning the entire package or lot code panel to their retail store.

Consumers with questions are encouraged to contact (844) 505-3844, 24 hours per day, 7 days per week.