Some microorganisms transmitted to man via tick bite are responsible for infections, which can be associated with neuro-meningeal complications. TBE virus is the most frequent virus associated with potentially severe neurological lesions. No treatment is available so far. The most frequent bacterial diseases in which neurological complications may appear are
Lyme borreliosis, Q fever and some rickettsial infections. More recently ehrlichiosis have emerged as new infections that may be associated with neuro-meningeal complications. Appropriate antibiotic therapy may be used for the treatment of these bacterial infections, but no vaccine is available so far.