The major implicated infectious agents include&colon; mycobacteria, fungi, borrelia, and rickettsia. Typhus is caused by "rickettsia", which is transmitted to humans through lice. He infected prisoners with rickettsia and mental health patients with typhus. These symptoms are likely caused by a vasculitis caused by the rickettsia. They are all caused by bacteria of the genus "Rickettsia". It was originally identified as a species of "Rickettsia". The genome is similar to that of "Rickettsia prowazekii". Researchers believe that this mechanism is similar to that of "Rickettsia conorii". This type of transmission is seen in other parasites like viruses or "Rickettsia". A possible role for "Rickettsia" in this disease has been proposed. Rickettsialpox is a mite-borne infectious illness caused by bacteria of the genus "Rickettsia" ("Rickettsia akari"). Genetically, it differs from other "Rickettsia" by only 9%. An example of this is "Rickettsia" which causes typhus. The organism itself was demonstrated 1925 when it was recognized to be a "Rickettsia". Epidemic typhus is caused by the bacteria Rickettsia Prowazekii; it comes from lice.