A Proposal that Herpesviruses are Co-Factors of HIV Disease

Abstract

There is now extensive evidence that herpesviruses can interact with human immunodeficiency virus (HIV) in vitro. To determine if such interactions could be operative in vivo, evidence from AIDS autopsy series are reviewed. Using basic histopathological techniques, cytomegalovirus (CMV) and HIV coinfection of various individual ceils has been demonstrated. Using cell culture, CMV has been detected in 66% and herpes simplex virus in 11% of patients. Using immunocytochemistry, human herpesvirus type 6 (HHV-6) has been found in virtually all tissue sections. The hypothesis that these viruses contribute to the death of individuals with AIDS is supported by the results of two double-blind, placebo-controlled randomized trials of high-dose aciclovir and an observational study of the same drug. All three studies have shown improved survival. Thus, the case is made that herpesviruses act as co-factors of HIV disease, and that inhibition of such infections represents a potential way of reducing mortality in those with AIDS. This paper was presented as the case for in a debate on ‘Herpesviruses as co-factors of HIV disease’. The case against was made by Don Jeffries (see page 22)