Two people in Washington state are among 11 sickened by salmonella infections tied to Wonderful Pistachios distributed by a California firm. Consumers should discard the potentially tainted nuts, health officials say.

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Two people in Washington state are among 11 sickened by salmonella infections tied to Wonderful Pistachios, federal health officials reported Wednesday.

Nine people in eight other states have been sickened, too, including two people hospitalized after infections with Salmonella Montevideo bacteria. The nuts, packaged under the brands Wonderful, Paramount Farms and Trader Joe’s, were sold nationwide and in Canada.

Wonderful Pistachios of Lost Hills, Calif., voluntarily recalled certain flavors and sizes of in-shell and shelled pistachios Wednesday because they could be contaminated with salmonella.

Products can be identified by lot-code numbers on the packages of pistachios. For a list of specific products affected and their identifying codes, visit www.wonderful.com.

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Illnesses began on dates ranging from Dec. 12, 2015 to Feb. 9, 2016. Illnesses that occurred after Feb. 11 might not be listed yet because of a lag in reporting time. Of nine people interviewed by officials, eight, or 89 percent, reported eating pistachios in the week before they fell ill, according to the Centers for Disease Control and Prevention.

The nuts have a long shelf life and may still be in people’s homes. Consumers should discard the nuts.

Besides the Washington cases, illnesses include two in Arizona and one each in Alabama, Connecticut, Georgia, Michigan, Minnesota, North Dakota and Virginia.

Investigators using whole-genome sequencing found the genetic fingerprint of the salmonella found in sick people matched isolates in samples of raw pistachios.

Salmonella infections can cause symptoms including fever, diarrhea and abdominal cramps. Most people recover quickly, but some people, typically the young, the elderly and those with compromised immune systems, can become seriously ill.