Listeria is a genus of Gram-positive, rod-shaped, facultatively anaerobic bacteria that function as intracellular parasites in mammals. As of 2024, there are 28 identified species within the genus, which is named after Joseph Lister, a pioneer of sterile surgery. Listeria bacteria do not produce endospores.
In 1929, the first documented human case of listeriosis was described by the Danish physician Aage Nyfeldt.
In 1957, the genus Listeria was classified in the family Corynebacteriaceae through the seventh edition of Bergey's Manual of Systematic Bacteriology.
In 2004, the genus Listeria was placed in the newly created family Listeriaceae.
In 2008, cold-cut meats were implicated in a Listeria outbreak in Canada.
In 2011, improperly handled cantaloupe was implicated in the outbreak of listeriosis from Jensen Farms in Colorado.
In early 2018, a listeriosis outbreak occurred across eastern Australia, also linked to improperly handled cantaloupe.
In September 2019, three deaths and a miscarriage were reported in the Netherlands after consumption of Listeria-infected deli meats produced by Offerman.
As of 2024, the Listeria genus contains 28 species, classified into two groups: sensu stricto and sensu lato.
As of 2024, the Listeria genus is recognized to include 28 distinct species.
In 2024, a widespread Listeria outbreak occurred in the US, linked to cold-cut meats.
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