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  • 1 Semmelweis Egyetem, Általános Orvostudományi Kar Közegészségtani Intézet Budapest Nagyvárad tér 4. 1089
  • 2 University of South Florida College of Medicine Department of Molecular Medicine Tampa FL
Open access

Az 1986-ban felfedezett emberi 6-os herpeszvírus A és B változata molekuláris tulajdonságai alapján a legősibb emberi herpeszvírus. A B változat cseppfertőzéssel terjed a tünetmentes vírusürítő felnőttekről a két év alatti kisgyermekekre, akikben alkalmilag exanthema subitum jöhet létre. A vírus a CD4+ macrophagokat, lymphocytákat fertőzi, utóbbiakban élethossziglan lappangás, időnként a nyálmirigyekben vírustermeléssel járó perzisztencia alakul ki. Felnőttkorban ez a változat csontvelő- és szervátültetések kapcsán, immunszuppresszió talaján reaktiválódik, és akár halálos szövődményeket hoz létre. Sclerosis multiplex, idült fáradtság tünetegyüttes, Hodgkin- és nem Hodgkin-lymphomák kialakulásában kofaktor. A CD+-sejteket fertőző és bennük lappangó A változat közvetlen kórokozó képessége nem ismert. A HIV-fertőzést rendkívül erősen transzaktiválja in vitro és betegekben egyaránt. Papillomavírusok által okozott daganatokban is transzaktivátor. Mindkét vírusváltozat kórokozó képessége a megváltozott citokin- és kemokinegyensúlyon alapszik. A két változat elkülönítése szerológiailag nehézkes, erre a savóból vagy a fehérvérsejtekből végzett változatspecifikus PCR alkalmas. A súlyos komplikációk kezelésére, esetleg kemoprofilaxisára ganciclovir, esetleg foscarnet és cidofovir használható.

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