This document discusses various types of orthopedic infections including acute and subacute hematogenous osteomyelitis, chronic osteomyelitis, purulent infectious arthritis, soft tissue infections, and postoperative, posttraumatic, and postarthroplasty infections. It covers the incidence, diagnosis, and treatment of these conditions. Key factors that can influence infections include patient factors like general health, immunology, and alcohol/medicine use as well as surgical factors such as preparation, sterilization, and operating theater. Diagnosis involves clinical examination, laboratory tests, imaging like x-rays, ultrasound, CT, and MRI scans. Treatment depends on the type and severity of infection but generally involves antibiotics, biopsy or aspiration, surgery