(py/o/= pus, genus = producing) is a pus producing situation. This could be a wound or an insect bite that has gotten infected. Regardless, it needs to be treated and healed. It also cannot be allowed to stay open as the pus can dry, become airborne on air currents. It is then transported to someone else. If that person has an open area, the attached disease-causing micro-organisms will infect that person under certain conditions.
(pi-yo-jen-ik) (Greek pyon-pus; genesis-producing) Any agent that causes pus producing is potentially pyogenic. Usually the organism is a bacterium. It reaches the bone or any other tissue via blood and lodges itself in the tissue thereby destroying the structures. The immune system combats the infection, resulting in the death of a large number of cells. These cells are collected as pus. The bones of the hip and knee joint are commonly involved.