A protracted salmonella outbreak in Canada, associated with pistachio products, continues to pose a significant public health challenge as the number of reported illnesses climbs to 189. This outbreak, which first surfaced in early March 2025, has proven difficult to manage due to a combination of factors, including the widespread distribution of contaminated products and the complexities of the supply chain. The majority of cases have emerged in Ontario and Quebec, prompting health officials to issue renewed warnings to consumers.
Complexity of the Outbreak
April Hexemer, director of the outbreak management division at the Public Health Agency of Canada (PHAC), highlighted the unusual nature of this outbreak during a recent briefing. “It is an unusual outbreak in many ways,” she stated. “We don’t generally see outbreaks last this long, especially after the source has been identified.” As the investigation unfolds, the challenges of tracing the source and controlling the spread of illness remain significant.
In December, the Canadian Food Inspection Agency (CFIA) revealed that the implicated pistachios were imported from Iran. However, the agency has not confirmed whether a specific crop is responsible for the contamination. In response to the ongoing threat, the CFIA implemented a temporary ban on imports of pistachios and products containing them from Iran, intending to mitigate further risks.
The Role of Supply Chain Dynamics
Hexemer elaborated on the complexities of the pistachio supply chain, which has made it particularly challenging to identify and isolate the source of the contamination. “Pistachios are very popular now and they are being used in a lot of products,” she noted. They are often incorporated into various foods, from pastries to chocolate bars, and are not sold under a single brand name.
As a result, health officials are continuing to investigate new cases to pinpoint the origins of the illnesses. Hexemer emphasised the importance of thorough investigations and refrained from speculating on potential causes until more information is gathered. “Our advice at this time remains unchanged: we’re asking people to not eat or use or serve the products that have been recalled,” she urged.
Ongoing Monitoring and Consumer Safety
Since the outbreak’s inception, PHAC has reported an additional 11 lab-confirmed cases, bringing the total to 189. It is estimated that for every confirmed case, there could be an additional 26 instances of illness that have gone unreported. Among the total cases, 26 individuals have been hospitalised, though fortunately, no fatalities have been recorded.
The CFIA continues to conduct food safety investigations stemming from the initial concerns raised about the Habibi brand of pistachio kernels in July. In December, a notification was issued to retailers and food service operators, warning them of potential contamination in imported pistachios from Iran. They were advised to verify their inventory against recall lists and to discard or return any affected products.
Moreover, businesses have been cautioned not to depend on traditional methods, such as roasting, to eliminate salmonella, as the bacteria can survive in high-fat, low-moisture foods like pistachios.
The Path Forward
The ongoing investigation has led to hundreds of recalls since the outbreak began. Between July and November alone, approximately 46 recall warnings and 22 notifications were issued. Following the consolidation of recall information on November 12, an additional 344 products were recalled by March 16, encompassing a wide variety of brands and distribution points.
Despite the persistence of the outbreak, Hexemer remains hopeful. “While it has been ongoing for some time, the outbreak will eventually come to an end,” she reassured. “In my experience, all outbreaks do come to an end, and we are working to collect the evidence needed to determine the next steps to bring this to a close.”
Why it Matters
This prolonged salmonella outbreak serves as a stark reminder of the vulnerabilities within our food supply systems and the importance of stringent food safety practices. As health officials continue to grapple with the complexities of contamination, consumers must remain vigilant about the origins of their food products. The ripple effects of such outbreaks not only jeopardise public health but also highlight the need for robust regulatory frameworks to protect the population from future risks.
