A salmonella outbreak in Canada, linked to pistachio products imported from Iran, is proving difficult to control, a year after the first cases emerged.

First reported in March 2025, the outbreak has now reached 189 reported illnesses, predominantly in Ontario and Quebec. Officials cite the long shelf life of pistachios, their widespread distribution, and a complex supply chain as key factors allowing the outbreak to persist.

The Canadian Food Inspection Agency (CFIA) identified pistachios involved in recalls as originating from Iran. Despite temporary import restrictions implemented in September, the product's versatility-used in pastries, chocolate, and repackaged under various brands-contributes to the challenge.

Officials advise consumers to avoid eating or serving any recalled pistachio products. While 26 individuals have been hospitalized, no deaths have been reported.

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The CFIA has issued warnings to businesses, emphasizing that dry heat, such as roasting, may not eliminate salmonella in high-fat, low-moisture foods like pistachios. Hundreds of pistachio products have been recalled since July.

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Authorities recommend avoiding pistachios from Iran or any product with an unconfirmed origin to prevent further illness, expecting the outbreak to eventually conclude as investigations continue.