Necrobacillosis--primary anaerobic septicaemia due to Fusobacterium necrophorum.

Necrobacillosis is a severe septicaemic illness caused by an anaerobic Gram-negative bacillus, Fusobacterium necrophorum. It occurs predominantly in young people and is characterised by oropharyngeal infection and subsequent metastatic complications, frequently involving the lungs and/or large joints. We report four recent cases in previously healthy young men, describing the clinical features of the disease (including autopsy findings), and the problems associated with diagnosis and treatment.