Salmonella meningitis is an unusual complication of Salmonella sepsis and occurs mainly in children. A rare case of Salmonella typhimurium meningitis occurring in an adult HIV positive man who presented with a history of fever and diarrhoea is reported. On examination he was dehydrated, and had oral thrush, weakness of lower limbs and neck stiffness. A septic diagnostic screen was performed and he was commenced on empiric intravenous cefotaxime therapy for meningitis. S typhimurium was cultured from cerebrospinal fluid and blood culture specimens. It was non-lactose fermenting, oxidase negative, H2S positive and motile. Cefotaxime was continued for 14 days and the patient responded without neurological sequelae.