Assay for monkeypox virus, HSV1-2, HHV-6, VZV and enteroviruses.
Pityriasis rosea was reported more frequently after vaccination than during or after acute infection.
Investigators see possible links to systemic sclerosis, liver fibrosis and cardiovascular remodeling.
Systematic review and meta-analysis confirm an association, but not a causal link, between HHV-6 and CFS
So far only one case report has documented HHV-6B reactivation in COVID-19, but the rise in Kawasaki-like symptoms and pityriasis rosea has at least one dermatology group suspicious of HHV-6/7 reactivation.
Patients with DRESS/DIHS hypersensitivity reactions and active HHV-6 often develop autoimmune diseases such as type 1 diabetes and autoimmune thyroiditis. Investigators at National Taiwan University Hospital believe that IP-10 is key to this process.
A group led by Elisabetta Caselli at University of Ferrara discovered HHV-6A in the skin and elevated levels of HHV6-B in the peripheral blood of systemic sclerosis patients
A Swiss team studied 134 young children who were experiencing unidentified high fevers and were able to find at least one virus in 35% of those patients. The two biggest culprits were enterovirus (14%) and HHV-6 (11%).
It has long been a mystery why HHV-6 is preferentially reactivated in drug reaction with eosinophilia and systemic symptoms (DRESS), also known as drug induced hypersensitivity syndrome (DIHS). HHV-6 reactivation occurs in over 60% of severe cases and is part of the definition of DIHS in Japan. Investigators in Japan suspect that the explanation may lie with the CD134 receptor on activated CD4 cells.
HHV-6 may be the cause of “fever of unknown origin” in 30% of stem cell transplant (SCT) patients. By the third week after SCT, 70% of HHV-6 positive patients had a skin rash, compared to 39% of HHV-6 negative patients.
Italian study finds 62% of women who developed PR early in their pregnancies miscarried
HHV-6 and other herpesviruses may be involved in the development of acute or recurrent acute urticaria.