What is the inflammatory process caused by bacteria that affects the periosteum?

• A. Osteomyelitis
• B. Periostitis
• C. Septic arthritis
• D. Bone cyst

Answer: (B)

The inflammatory process caused by bacteria that specifically affects the periosteum is known as periostitis. This condition involves the inflammation of the periosteum, which is a dense layer of vascular connective tissue enveloping the bones except at the surfaces of the joints. When bacteria invade and disrupt the periosteum, it leads to pain, swelling, and tenderness over the affected area, which is characteristic of periostitis.

Osteomyelitis, while also an inflammatory condition influenced by bacterial infection, primarily refers to the infection of the bone itself rather than the periosteum. Septic arthritis involves inflammation of the joint space due to infection but does not directly affect the periosteum. Bone cysts are fluid-filled spaces within a bone and do not involve inflammatory processes or the periosteum. Therefore, the definition and implications of periostitis align perfectly with the question about inflammation of the periosteum caused by bacteria.