[Two cases of infectious mononucleosis-like syndrome associated with human herpes-virus 6].

We experienced two cases of infectious mononucleosis-like syndrome associated with human herpesvirus 6 (HHV-6). One of the patients had been under medication for depression and the other one for schizophrenia. Both of them were taking carbamazepine for more than a week along with the other drugs. The manifestation of the symptoms of those two were almost same, such as high fever, generalized eruption, liver dysfunction, lymph-adenopathy, and existence of atypical lymphocytes. Serological tests for EB virus, cytomegalovirus and herpes simplex virus showed no significant change while the tests for HHV-6 showed increased titers of IgG antibody during the courses. We also examined HHV-6 DNA by real time quantitative PCR tests for HHV-6, and they appeared significantly high in the peripheral blood samples.