NURS 3110 Lecture Notes - Lecture 10: Listeria Monocytogenes, Cheeses Of Mexico, Lunch Meat
Document Summary
The organism: variable morphology - coccobacilli to long filaments, flagella, no capsules or spores. Circular shapes and bacilli shapes visible in gram smear. Once inside phagocyte, will proliferate (inside cytoplasm: resistant to cold, heat, salt, ph extremes. Resistant to cold: food right out of refrigerator. Clinical disease: epidemic listeriosis: associated w/ contaminated foods (mexican cheese, coleslaw, milk, ice cream [grows in cold]), hummus, cold cuts, esp. in pregnant women, immunocompromised. Pregnant women will develop symptoms related to infection; developing fetus will have consequences (still birth, miscarriage: perinatal infections (transplacental) Early onset: intrauterine sepsis, stillbirth or shortly thereafter. Late onset: meningitis between birth & 3 weeks. Delivering baby exposed to listeria: meningitis or sepsis in immunosuppressed patients. Respiratory distress (flared nostrils, rapid breathing, cyanosis, grunt) Rash: with flu and cold like symptoms (serious) If into csf, inducing meningitis hydrocephalies (pressure to brain tissue/stem) Can induce mental retardation: pregnant and immunocompromised individuals: Individuals with hiv/aids: 200-300x more likely at risk.
