• ORT 1.1 Acute osteomyelitis - unknown pathogen
• ORT 1.2 Acute osteomyelitis - Staphylococcus aureus
• ORT 1.3 Acute osteomyelitis - Streptococcus pyogenes (group A streptococci)
• ORT 1.4 Acute osteomyelitis - Pseudomonas aeruginosa
• ORT 2.1 Osteomyelitis - chronic
• ORT 3.1 Septic arthritis - unknown pathogen
• ORT 3.2 Septic arthritis - Staphylococcus aureus (S. aureus)
• ORT 3.3 Septic arthritis - streptococci/pneumococci
• ORT 3.4 Septic arthritis - Enterobacterales
• ORT 3.5 Septic arthritis - Pseudomonas aeruginosa
• ORT 3.6 Septic arthritis - gonococci (Neisseria gonorrhoeae)
• ORT 3.7 Septic arthritis - Borrelia spp, Lyme
• ORT 4.0 Infection of joint prosthesis/osteosynthesis material - unknown pathogen
• ORT 4.1 Prosthetic joint/osteosynthesis material infection - Staphylococcus aureus (S. aureus)
• ORT 4.2 Prosthetic joint/osteosynthesis material infection - coagulase-negative staphylococci
• ORT 4.3 Infection of joint prosthesis/osteosynthesis material - methicillin-resistant Staphylococcus aureus (MRSA)
• ORT 4.4 Infection of joint prosthesis/osteosynthesis material - Streptococcus spp. (streptococci)
• ORT 4.5 Prosthetic joint/osteosynthesis material infection - Enterococcus (amoxicillin susceptible)
• ORT 4.6 Infection of joint prosthesis/osteosynthesis material - Enterococcus (amoxicillin resistant)
• ORT 4.7 Prosthetic joint/osteosynthesis material infection - Propionibacterium acnes (Cutibacterium)
• ORT 4.8 Prosthetic joint/osteosynthesis material infection - Enterobacterales
• ORT 4.9 Infection of prosthetic joint/osteosynthesis material - Pseudomonas aeruginosa