Listeriosis: zoonosis caused by a Gram-positive rod-shaped bacterium
Transmission usually from infected food or vertically from mother to foetus
Clinical presentation: neonatal septicaemia, meningitis or granulomatosis infantisepticum
Adults: meningitis-encephalitis ± subcortical brain abscess in immunosuppressed people
Adults: bacteraemia, sometimes accompanied by organ abscesses
Pregnant women: listeriosis in third trimester often results in the foetus being infected and stillborn
Treatment: ampicillin or penicillin G, either with or without aminoglycosides
