Listeria monocytogenes

General Information

Aerobic gram positive bacilli

  • Important bacterial pathogen in neonates, pregnant women (most commonly in third trimester), elderly, and immunocompromised patients.

  • Foodborne illness associated with deli meat, soft cheeses, unpasteurized milk, and others.

  • Often occurs in outbreaks

  • Habitat of Listeria is the soil and decaying vegetable matter

  • Meningitis

  • Rhombencephalitis

  • FUO

  • Bacteremia

  • Septic abortion/miscarriage/stillbirth

  • Self-limited gastrointestinal illness with diarrhea

  • Reproductive Infectious Disease consultation recommended to assist in evaluation/management.

  • Notify Public Health ASAP

  • Infections in adults are thought to result from oral ingestion and subsequent intestinal mucosal penetration and systemic infection

  • Listeria crosses the placenta in maternal bacteremia and infects the fetus

    • This can lead to fetal death, preterm birth, and neonatal infection (sepsis, meningitis, death)

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