“…However, a human study that sought to identify the cause and characterize signs of encephalitis in California over a 2 year period found Bartonella species to be the most common bacterial agent associated with encephalitis (Glaser et al 2003). Signs of neurological dysfunction include encephalopathy (Carithers 1985, Carithers and Margileth 1991, Margileth 1993, Noah et al 1995, transverse myelopathy (Pickerill and Milder 1981), demyelinating polyneuropathy (McNeill et al 2000), facial nerve paralysis (Walter and Eppes 1998), aseptic meningitis (Wong et al 1995), cerebral arteritis (Selby and Walker 1979), neuroretinitis (Ormerod and Dailey 1999) and radiculopathy (Marra 1995). Encephalopathy is considered one of the most serious complications of CSD (Noah et al 1995, Chomel et al 2003 and can manifest with fever, headaches, mentation changes (aggression, confusion and excitability), combative behavior, tonic-clonic seizures, status epilepticus and occasionally, coma that develops 1e8 weeks after the onset of lymphadenopathy (Carithers 1985, Carithers and Margileth 1991, Weston et al 2001.…”