Bacteria of the genus Rickettsia are found in ticks, with fleas, mites and lice also being potential carriers. The bacteria have become widespread, including in ticks in Germany and Switzerland. In humans, these bacteria can cause various diseases that result in different clinical assessments, the so-called “relapse fever infections” (group of rickettsiosis). These include spotted fever, rickettsia pox, Brill-Zinsser disease, Mediterranean tick fever and Rocky Mountain spotted fever.
The clinical assessment is marked by fever, headache, drowsiness, a macular exanthema (small red spots) and even myocarditis.