Name the fungus used in organ transplant treatment. Write the product of this organism and explain its specific use

Fungus = Trichoderma polysporum.
Bioactive milecule, cyclosporin A, that is used as an immuno-suppressive agent in organ-transplant patients, is produced by the fungus Trichoderma polysporum.
It is used as an immuno-suppressive agent to decrease the chance of failure of organ transplantation.