A listeria outbreak linked to frozen supplemental shakes has led to at least 38 illnesses across 21 states, with 37 hospitalizations and 11 deaths, according to an update from the United States Food and Drug Administration on Friday.
The infections have been traced to specific Sysco Imperial and Lyons ReadyCare products, which were primarily distributed to food service providers such as hospitals and long-term care facilities.
The U.S. Centers for Disease Control and Prevention reports that the outbreak dates back to 2018 but is still ongoing, with 20 cases reported in 2024 and 2025.
The FDA is continuing its investigation into the situation.
In response, Sysco announced on Friday that it has recalled the affected shakes, notified its customers, and suspended purchases from a Lyons Magnus facility in Fort Wayne, Indiana—the source of the contaminated products.
“Sysco expresses our most sincere condolences with those affected by this outbreak and their families,” the company stated. “Food safety is and will continue to be our top priority, and our focus will always be on improving these programs that protect our customers and our communities from foodborne illnesses.”
Listeria is one of the deadliest foodborne pathogens in the U.S., responsible for approximately 260 deaths annually.
Symptoms of infection can appear days or even weeks after exposure and may include fever, muscle aches, and fatigue.
In severe cases, individuals can experience confusion, seizures, headaches, or a stiff neck. Older adults, pregnant individuals, and those with weakened immune systems face the highest risk of complications.
Anyone experiencing symptoms of listeria infection should seek medical attention immediately.
While many people recover without treatment, severe cases may require antibiotics.
