Articles Tagged with ''listeria''

Using 1,204 samples collected during 2016–2023, the researchers observed statistically significant reductions in the median time from sample collection to the issuance of a national genomic surveillance report to 26 days, despite sample numbers doubling in 2022 and 2023.

In the study, researchers analyzed the entire genome of over 1,600 Listeria strains. These DNA profiles were used to train a machine learning model that learned to identify genetic patterns associated with resistance to disinfectants commonly used in the food industry. 

According to FDA, between 2018 and 2025, 42 people were sickened and 14 died across 21 states after consuming Listeria monocytogenes-contaminated Sysco Imperial and Lyons ReadyCare Frozen Supplemental Shakes that were served at long-term care facilities and hospitals. 

In 2024, UKHSA investigated seven listeriosis outbreaks across England and Wales, linked to various food products including smoked fish, chocolate and strawberry mousse, garlic sausage and pre-packed sandwiches.

Initially launched in 2024, the investigation was reopened in April 2025. Whole genome sequencing (WGS) analysis confirmed that the strain of Listeria found at Fresh & Ready Foods LLC matches the strain of Listeria causing illnesses in this outbreak.

The 2023 annual report highlights a few noteworthy outbreaks: illnesses linked to toxins from morel mushrooms, lead linked to cinnamon in applesauce pouches, and Listeria monocytogenes linked to soft serve ice cream cups.

Collaboration between the two agencies suggests that the suspected source of the outbreak involves products under the jurisdiction of both.

This episode of Food Safety Five discusses two scientific advancements related to Listeria monocytogenes control: 1) a study that showed the effectiveness of combining antimicrobial blue light with chemical sanitizers for pathogen inactivation, and 2) the development of a new growth prediction model for L. monocytogenes in artisanal cheeses.  

The UK Health Security Agency (UKHSA) recently published its first annual report summarizing infectious disease trends, which noted increases in the incidence of infections by important foodborne pathogens like Escherichia coli, Salmonella, Listeria monocytogenes, Campylobacter, and norovirus.

Although trends in Listeria monocytogenes outbreaks are important, it is more concerning that these outbreaks continue to occur despite industry efforts. This article explores the underlying causes of persistent L. monocytogenes outbreaks and emphasizes the need for leadership behaviors outside of food safety to transform organizational culture to eradicate or control L. monocytogenes.