These experiments confirmed that the observed cluster of adaptations resulted in resistance specifically to cercopithecine lentiviruses, but had no effect on restriction
of other retroviruses, including lentiviruses of other, non-cercopithecine primates.
They have known for many years that HIV,
like other retroviruses, needs help from its host's cellular machinery — for example, to transcribe its genetic material.
The team wondered
if other retroviruses might cause these symptoms in separate diseases such as schizophrenia.
Using his initial finding as a template, other groups have found a requirement for the cellular cytoskeleton in entry
of other retroviruses, including HIV.
However, subsequent studies carried out on small numbers (20 — 30) of CFS patients, failed to confirm evidence for HTLV (type 1 or 11)[22]--[25] or
other retroviruses, including the closely - related simian T lymphotropic virus type l, the prototype foamy virus, simian retrovirus, bovine and feline leukaemia viruses [26] and HIV - 1 [23].
Infection with either FeLV or FIV was associated with increased risk for coinfection with
the other retrovirus, M. haemofelis, or M. haemominutum.