Final answer:
Osteomyelitis is the disorder characterized by bone infection often linked with septic arthritis, starting in the metaphysis and commonly caused by S. aureus. This infection can lead to symptoms like fever, pain, and swelling. Antibiotics and surgery are among the treatment options.
Step-by-step explanation:
The disorder characterized as an infection in the bone that is often associated with septic arthritis and typically starts as a bloody abscess in the metaphysis of the bone is osteomyelitis. Osteomyelitis is most commonly caused by infection from various bacteria, with S. aureus being the most frequent causative agent. The infection can be acute or chronic, and in children, it commonly spreads from the bloodstream to long bones due to their extensive vascularization.
S. aureus is also the most common cause of both septic arthritis and osteomyelitis. The symptoms of osteomyelitis include fever, localized pain, swelling, and potentially ulcers in soft tissues near the site of infection. Treatment options include a range of antibiotics and possibly surgery or implantation of antibiotic beads or pumps to control the infection.