A boy presented with multiple non suppurative osteomyelitis with sickle cell anaemia. What will be the causative organism?

Orthopaedics

A boy presented with multiple non suppurative osteomyelitis with sickle cell anaemia. What will be the causative organism?

What is the use of the given instrument:

Which fracture results in the given deformity?

Positive pivot shift test in knee is because of injury to -