Listeria monocytogenes is Gram (+), catalase (+), grows well in cold (cold enrichment); it is found in deli meats, milk, and cheese. It is transmitted transplacentally or vaginally. Histologically it causes 'Actin Rockets' and tumbling motility. Manifestations include bacteremia, spontaneous abortion, neonatal/adult immunocompromised meningitis, granulomatosis infantiseptica, and gastroenteritis. It affects neonates and immunocompromised individuals. Treatment is with ampicillin.
Listeria monocytogenes es Gram (+), catalasa (+), crece bien en frío (enriquecimiento en frío); se encuentra en carnes frías, leche y quesos. Se transmite transplacentaria o vaginalmente. Histológicamente causa 'Actin Rockets' y tiene motilidad de tumulación. Las manifestaciones incluyen bacteriemia, aborto espontáneo, meningitis neonatal/adultos inmunocomprometidos, granulomatosis infantiseptica y gastroenteritis. Afecta neonatos e inmunocomprometidos. El tratamiento es con ampicilina.
| Front | L.monocytogenes List (2) features and (1) special feature What are (4) sources? How is it transmitted? What is a histological finding? List (6) manifestations What patient population is at risk? What antibiotic is used in Rx? |
|---|---|
| Back | Catalase (+) Grows well in cold (cold enrichment) Source ↓ Deli meats, hot dogs, milk, cheese Transmission ↓ Transplacental | Vaginal Histology ↓ Actin Rockets | Tumbling motility Manifestations ↓ Bacteremia | Septicemia Spontaneous Abortion Neonatal Meningitis Meningitis (immunocompromised | transplant pts) Granulomatosis Infantiseptica Self-limiting gastroenteritis (healthy individuals) Affects neonates (due to undeveloped CMI) and immunocompromised Treatment ↓ Ampicillin |
Tags: microbiology
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