At least 11 people became ill and two were hospitalized after eating pistachios contaminated with salmonella.
The Centers for Disease Control and Prevention lab traced the pistachios to California-based Paramount Farms.
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That's the same farm Trader Joe's and Wonderful Pistachio brands are sourced from.
According to the CDC, cases have occurred in nine different states. Arizona and Washington had two cases each.
The outbreak started in December of last year, and illnesses were reported through early February. Wonderful Pistachios, which owns Paramount Farms, recalled several of its products Wednesday.
In a press release, the company said this is the first time in 30 years one of its products has needed to be recalled.
The CDC says this strain of salmonella causes symptoms 12 to 72 hours after eating the tainted food and recommends all pistachios from these brands be returned.
See more cases of food poisoning in recent years: