A prolonged salmonella outbreak in Canada, associated with pistachio products, has continued to spread illness over a year after the initial cases were identified. The outbreak, which began in early March 2025, has resulted in 189 reported illnesses, predominantly in Ontario and Quebec. Public health officials cite a combination of factors that complicate containment efforts, raising concerns among health advocates and the general public alike.
Complexity of the Supply Chain
April Hexemer, director of the outbreak management division at the Public Health Agency of Canada (PHAC), remarked on the unusual nature of this outbreak. “We don’t generally see outbreaks last this long, especially after the source has been identified,” she stated. The persistence of the outbreak hinges on the shelf life of pistachios, the extensive distribution network, and the intricate supply chain associated with these products.
In December, the Canadian Food Inspection Agency (CFIA) revealed that the implicated pistachios were imported from Iran, although it has yet to confirm whether a particular crop is responsible for the contamination. Following this revelation, the CFIA instituted a temporary ban on imports of pistachios and products containing pistachios from Iran as a precautionary measure.
Ongoing Investigations and Recommendations
The investigation into the outbreak has been challenged by the diverse ways in which pistachios are utilised in food products—from pastries to chocolate bars. Hexemer explained that the pistachios are not marketed under a single brand name, which complicates tracking and recall efforts.
As of the latest reports, the PHAC has confirmed an additional 11 laboratory cases since their last update in March, with an estimate suggesting that for every confirmed case, there are likely 26 unreported illnesses. Among the affected individuals, 26 have been hospitalised, but thankfully, no fatalities have been recorded.
Public health officials continue to advise consumers against consuming any recalled products. “Our guidance remains unchanged: we urge people not to eat, use, or serve the products that have been recalled,” Hexemer cautioned.
Enhanced Safety Measures
The CFIA has been proactive in its food safety investigation since it initially linked the outbreak to the Habibi brand of pistachio kernels on July 24. In December, the agency warned retailers and food service providers to be vigilant regarding imported pistachios from Iran that could harbour salmonella bacteria. They were instructed to consult recall lists and to discard or return any products without confirmed origin or safety controls.
Moreover, businesses have been advised against relying on dry heat methods, such as roasting, as a means to eliminate salmonella, given that the bacteria can survive in high-fat, low-moisture environments like those found in pistachios.
Since the outbreak began, the CFIA has issued numerous recalls. From the first recall in July through to mid-March, there have been 344 separate product recalls, with brands and distribution points varying widely.
Looking Ahead
Despite the ongoing nature of the outbreak, Hexemer remains optimistic. “All outbreaks do come to an end. I have been doing this for a long time, and there will be an end,” she asserted. The agency continues to collect relevant data and evidence to determine the next steps necessary to resolve the situation.
Why it Matters
This protracted salmonella outbreak highlights the urgent need for robust food safety measures and transparency within the food supply chain. As the public grapples with ongoing health risks, it underscores the importance of vigilance in monitoring food imports and ensuring consumer safety. The complexity of food distribution networks can significantly hinder containment efforts, making it imperative for both consumers and health authorities to stay informed and proactive in preventing foodborne illnesses.
