Adv Virol. 2012;2012:205085. Epub 2012 Aug 13.
Association of Active Human Herpesvirus-6, -7 and Parvovirus B19
> Infection with Clinical Outcomes in Patients with Myalgic
> Encephalomyelitis/Chronic Fatigue Syndrome.
> Chapenko S, Krumina A, Logina I, Rasa S, Chistjakovs M, Sultanova A,
> Viksna L, Murovska M.
> August Kirchenstein Institute of Microbiology and Virology, Riga
> Stradins University, Ratsupites Street 5, LV-1067 Riga, Latvia.
> Frequency of active human herpesvirus-6, -7 (HHV-6, HHV-7) and
> parvovirus B19 (B19) infection/coinfection and its association with
> clinical course of ME/CFS was evaluated.
> 108 ME/CFS patients and 90 practically healthy persons were enrolled
> in the study.
> Viral genomic sequences were detected by PCR, virus-specific
> antibodies and cytokine levels-by ELISA, HHV-6 variants-by restriction
> analysis. Active viral infection including concurrent infection was
> found in 64.8% (70/108) of patients and in 13.3% (12/90) of
> practically healthy persons.
> Increase in peripheral blood leukocyte DNA HHV-6 load as well as in
> proinflammatory cytokines' levels was detected in patients during
> active viral infection.
> Definite relationship was observed between active betaherpesvirus
> infection and subfebrility, lymphadenopathy and malaise after
> exertion, and between active B19 infection and multijoint pain.
> Neuropsychological disturbances were detected in all patients. The
> manifestation of symptoms was of more frequent occurrence in patients
> with concurrent infection.
> The high rate of active HHV-6, HHV-7 and B19 infection/coinfection
> with the simultaneous increase in plasma proinflammatory cytokines'
> level as well as the association between active viral infection and
> distinctive types of clinical symptoms shows necessity of simultaneous
> study of these viral infections for identification of possible subsets
> of ME/CFS.
> Full paper: http://downloads.hindawi.com/journals/av/2012/205085.pdf