WASHINGTON ( CNN ) -- If you have a stash of pistachios in your house , pistachio ice cream in your freezer or trail mix in your backpack , do n't eat any of it . The FDA says it and the California Department of Public Health are taking `` a proactive approach . '' Wait until an inquiry into possible salmonella contamination is further along , advises FDA Associate Commissioner David Acheson . Kraft Foods Inc. notified the U.S. Food and Drug Administration last Tuesday that it found salmonella in roasted pistachios during routine testing . The nuts were traced to Setton Farms in Terra Bella , California , about 75 miles south of Fresno . Setton announced a recall , Kraft removed its Back To Nature Trail Mix from store shelves , and Kroger -- a grocery chain with stores in 31 states -- recalled Private Selection shelled pistachios from its retail stores . See the FDA 's complete recall list . `` Ultimately , the question is what should consumers do , and our advice to consumers is that they avoid eating pistachio products and keep checking the FDA Web site for the latest information , '' Acheson said . Watch why it 's important not to eat the nuts » . An investigation is under way into how the pistachios came to carry the bacteria . Salmonella can cause serious and sometimes fatal infections in young children , frail or elderly people , and others with weakened immune systems . Acheson stressed at a news conference Monday that the potential problems with pistachios were unrelated to this year 's recall of peanut products , including peanut butter . The pistachio investigation also involves the California Department of Public Health and the Centers for Disease Control and Prevention in Atlanta , Georgia . Setton Farms told the FDA that it anticipates recalling about 1 million pounds of products nationally in the next few days , which covers its crop output last year . Several people have told the FDA that they suffered gastrointestinal illnesses after eating pistachios , and the CDC was doing a genetic analysis , looking for any link between the people and salmonella strains , Acheson said . He said there could be some results by the end of the week . He said the FDA is `` ahead of the curve '' in the current investigation . `` I want to emphasize that this recall was not triggered because of an outbreak , in contrast to some of the previous situations , for example , like the peanuts where people were getting sick and it was determined that peanuts , peanut butter was the likely cause , '' Acheson said . `` This is a situation that the recall is being triggered because of ... action taken on the part of the food industry , '' he added . `` What we 're doing here is getting out ahead of the curve . It 's a proactive approach by the FDA and the California Department of Health . '' Jeff Cronin , spokesman for the advocacy organization Center for Science in the Public Interest , had a mixed reaction to Acheson 's comments . `` I think it 's partly the case , '' Cronin said . `` It 's good that the FDA is proactively issuing advice to consumers . '' But `` this still begets the question of 'how did this contamination happen in the first place ? ' Is this an isolated problem , or are we going to be hearing the same kind of horror stories that we heard about ... the company that produced the peanuts ? '' He said he wondered when was the last time the FDA visited Setton Farms and whether it had known of problems there . In February , the Texas Department of State Health Services ordered the recall of all products shipped from the Peanut Corporation of America 's plant in Plainview , Texas , after discovering dead rodents , rodent excrement and bird feathers in the plant . The company 's peanut butter and peanut paste products produced at its plant in Blakely , Georgia , were linked to a nationwide outbreak of salmonella poisoning that affected 600 people , nine of whom died . According to state health officials and many experts , the deadly outbreak of salmonella was fueled by poor oversight by food safety regulators and a slow response by federal agencies . The first problem is that almost nothing can stop companies from shipping contaminated food , William Hubbard , a former FDA associate commissioner , told a U.S. Senate committee in February . He also said there are not enough federal inspections . Other critics said the FDA stepped in too late in the peanut case to prevent a bigger problem . Food safety experts say the underlying cause of the problem is that the century-old system of regulation is broken . In the peanut case , the experts say , the federal government failed to oversee the safety of products coming out of the Blakely plant and was slow to identify it as the source of the salmonella .
Warning : Do n't eat pistachios until possible salmonella contamination is identified . Kraft Foods notified consumers of nuts found during routine testing . The tainted nuts were traced to Setton Farms in Terra Bella , California . Setton Farms announced a recall of 1 million pounds of pistachio nuts .