Definition: Ricketshism, also known as "ricketsonosis," is a rare and life-threatening blood-borne disease caused by the Rickettsia bacteria. This condition primarily affects individuals who are infected with Rickettsia chlamydophila (also known as Chlamydia trachomatis) or with the chlamydial infection, which is also called Chlamydia trachomatis. The symptoms of ricketshism can vary from mild to severe