Listeriosis Summary - Listeria Monocytogenes

Pathogen: Listeria Monocytogenes - Gram-positive rod, Aerobic, facultative anaerobe, motile, beta-hemolytic, Non-spore-forming

Risk Factors: Glucocorticoids, immunodeficiency, malignancy, pregnancy, Age > 65, PPI use

Food: Cold cuts, pate, hot dogs, soft cheese, frozen food, salad bar

Clinical Presentation:

 • Gastroenteritis → Invasive disease

 • Pregnancy

 • CNS infection 

Diagnosis: 

 • Stool culture (Gastroenteritis)

 • PCR, not widely available

 • Blood culture (Invasive disease)

 • CSF (CNS Infection)

 • MRI / CT if focal symptoms



By @TheIDtrivia



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