Conclusions
Fusobacterium are a rare cause of serious infection. Our data confirms from a population-based perspective that F. necrophorum affects mostly young, healthy adults. In contrast, F. nucleatum affects older individuals with co-morbidities, the highest risk being in persons on dialysis or with underlying malignancy. Fortunately, antibiotic resistance and mortality remains low. Mortality occurs primarily in patients with F. nucleatum, likely due to associated co-morbidities.