Listeria monocytogenes

What it is

Listeria monocytogenes is a facultatively anaerobic, rod-shaped, gram-positive bacterium [14]. It is a foodborne pathogen that can cause severe illness [3], [5].

Common uses

• Contaminant in ready-to-eat foods [1], [2]

• Pathogen causing listeriosis [5], [6]

Anxiety level

High. Listeria outbreaks generate significant public anxiety due to the severe health risks, high hospitalization rates, and potential for fatalities [14], [26], [27].

Cultural claims

• Listeria outbreaks have led to recalls of various food products, causing public concern and anxiety [26], [27], [30], [31].

Source sentiment

News sources express concern regarding Listeria outbreaks, emphasizing the potential for severe illness and death, particularly among vulnerable populations [26], [27], [30].

Origin

Listeria monocytogenes was first identified as Bacterium monocytogenes by Murray, Webb, and Swann in 1924, as a gram-positive bacillus responsible for epidemic cases of mononucleosis, a disease affecting laboratory rabbits and guinea pigs [32], [34].

First appeared: 1924

Studies

Nuance

While Listeria monocytogenes is generally harmful, the severity of illness varies depending on the individual's health status, with pregnant women, newborns, older adults, and immunocompromised individuals being at higher risk [14], [23].

Avoidance tips

• Avoid soft cheeses unless they are clearly labeled as made with pasteurized milk [25].

• Reheat hot dogs, luncheon meats, and deli meats until steaming hot [25].

• Avoid refrigerated pâtés or meat spreads [25].

• Don't eat refrigerated smoked seafood [25].

• Wash raw fruits and vegetables thoroughly [25].