The Centers for Disease Control and Prevention (CDC) has announced the conclusion of a multistate outbreak of Salmonella Typhimurium infections linked to organic basil. The outbreak, which affected 14 states, was investigated in collaboration with public health and regulatory officials across the country and the U.S. Food and Drug Administration (FDA). Food Poisoning News reported on the initial alert and subsequent recall expansion in April.
According to the CDC’s final report, released on June 18, 2024, a total of 36 confirmed cases were identified. The outbreak strain was traced back to Infinite Herbs brand organic basil, which is believed to have been contaminated with Salmonella. Illnesses were reported between February 11 and May 26, 2024, with four hospitalizations and no deaths.
Epidemiologists suspect that the actual number of affected individuals was likely much higher than reported, as many people recover without seeking medical attention or testing. The outbreak primarily affected adults, with a median age of 39 years, and showed a higher incidence among women (78% of cases).
Through interviews with affected individuals, investigators found that 75% of those questioned had consumed basil in the week before falling ill – a significantly higher percentage than the general population’s basil consumption rate. This data strongly suggested basil as the source of the outbreak.
The FDA’s traceback investigation identified Infinite Herbs, LLC, based in Miami, Florida, as the supplier of the contaminated 2.5-oz packages of organic basil. In response, Infinite Herbs issued a recall on April 18, 2024, which was expanded the following day to include Melissa’s brand fresh organic basil in 2 oz and 4 oz packages.
Genetic analysis of the bacteria using whole genome sequencing (WGS) confirmed that the samples from infected individuals were closely related, indicating a common source. Importantly, the analysis did not predict any antibiotic resistance in the outbreak strain.
The CDC emphasized that the recalled basil is no longer available for sale, and all use-by dates have passed.
Commenting on this story, one national food safety attorney said, “Fortunately this particular outbreak is over and no deaths have been reported. However, it’s a reminder of the importance of food safety pratices and the ongoing need to prevent and quickly respond to foodborne illness outbreaks.”
