Osteomyelitis is an infection of the bone that happens rarely but can cause serious problems. This is often caused when there is an infection elsewhere in the body that spreads through the bloodstream. The elderly, young children and patients with diabetes are more at risk of developing this infection. Osteomyelitis affects 2-5 out of every 10,000 patients. There are several types of Osteomyelitis including acute, chronic and vertebral.