Murine Typhus (Fleaborne Typhus)
Murine typhus, also called fleaborne or endemic typhus, is a rickettsial disease caused by the organism Rickettsia typhi. Another organism, R. felis, may also play a role in causing murine typhus. Rickettsiae are a type of bacteria. Most of the murine typhus cases in Texas occur in South Texas from Nueces County southward to the Rio Grande Valley, but a few cases are reported in other parts of the state each year.