what is septic arthritis
Definition. Septic arthritis is a serious infection of the joints caused by bacteria. This infection causes the joint to be filled with pus cells, which in turn release substances directed against the bacteria.However, this action can damage the bone and surrounding cartilage.This condition is considered a medical emergency.efinition. Septic arthritis is a serious infection of the joints caused by bacteria. This infection causes the joint to be filled with pus cells, which in turn release substances directed against the bacteria.