In the possible role for human herpesviruses (HHV) in the pathogenesis of multiple sclerosis (MS) neither clear distinction between the two variants of HHV-6, nor the involvement of HHV-7 have been described. Therefore, we quantitated HHV-6 variant specific and HHV-7 reacting antibodies in the CSF of 13 patients with MS or other neurological disorders by ELISA. Predominance in the positivity of...

Human herpesvirus 6 (HHV-6) was identified from patients with HIV and lymphoproliferative diseases in 1986. It is a β-herpesvirus and is divided into two subgroups, variants A and B. HHV-6 variant B is the cause of exanthema subitum, while variant A has not yet definitely proven to cause any disease. HHV-6, especially variant A, is a highly neurotropic virus and has been associated with many di...

We collected acute-phase and convalescent-phase serum samples from Brazilian patients who presented with exanthem of unknown origin and evaluated these samples by means of an immunoblot assay for seroconversion to human herpesvirus 6 (HIV-6) or human herpesvirus 7 (HIV-7). Measles or rubella had been clinically diagnosed in all these patients, but their sera were negative for antibodies to both...

AIMS/BACKGROUND Human herpesvirus type 6 (HHV-6) is the aetiological agent of exanthem subitum, and has also been linked with a variety of other diseases. The aim of this study was to investigate the role of HHV-6 in pneumonitis in children. METHODS Formalin fixed, paraffin wax embedded lung tissue from 33 children (age range two months to 16 years) who died with pneumonitis was subjected to ...

To define the molecular features characteristic of the early stages of infection of lymphocytes with human herpesvirus 6 (HHV-6) variant A or B, we studied the temporal regulation of expression of selected sets of viral genes. Thus, U42, U94, U89-U90, U73, and U39 are alpha genes since their transcripts (i) were made in the presence of inhibitors of protein synthesis and (ii) were detected 3 h ...

background: the aim of this study was to determine the prevalence and viral load of epstein–barr virus (ebv) and human herpesvirus‑6 (hhv‑6) in different histopathologic grades of oral squamous cell carcinoma (oscc). methods: forty‑five formalin‑fixed paraffin‑embedded tissue section of oscc patients were analyzed by quantitative real‑time polymerase chain reaction for detection of ebv and hhv‑...

CD46 and CD134 mediate attachment of Human Herpesvirus 6A (HHV-6A) and HHV-6B to host cell, respectively. But many cell types interfere with viral infection through rapid degradation of viral DNA. Hence, not all cells expressing these receptors are permissive to HHV-6 DNA replication and production of infective virions suggesting the involvement of additional factors that influence HHV-6 propag...