[Four cases of adult Listeria monocytogenes infection in the last 5 years--hepatic necrotic foci in the adult septic case].

We have reported on the clinical courses of 4 cases of adult Listeria monocytogenes (Lm) infection, and the autopsy findings of 2 cases, those we have observed over the past 5 years. They were 2 cases of meningitis, 1 case of meningitis and sepsis and 1 case of sepsis. These 4 cases had CML, neoplastic angioendotheliosis, SLE and post-renal transplant condition, as their underlying diseases, and all were receiving immunosuppressive therapy. One meningitis patient who recovered showed mild liver dysfunction during her clinical course. The other 3 patients who died had jaundice at the time of onset and severe liver dysfunction. The 2 cases those were autopsied were the sepsis cases. The one with an acute course and hepatic failure showed multiple miliary necrotic foci in the liver, where the presence of Lm in the cells could be verified. The other autopsy case, which had received adequate antibiotic therapy and the Lm infection had been cured, showed no necrotic foci in the liver. The case that had necrotic foci in the liver was the first such adult case in Japan. We have discussed the hepatic Lm infection in adult compromised hosts, which conventionally has not been considered a serious problem.