Welcome to HCM.
Sexual contacts other than hetrosexual contacts, some people may not think that it could cause HIV
So a detailed history of homosexual contact also is necessary. Another thing is the people usually attribute their infection to the recent contacts ,say within a year or two. They simply forget or ignore the activities before 10-12 years. In many cases the symptoms appear after 10 years , that is after the immunity worsened.
History blood transfusion
during any of the surgery or some other occasion during the past 15 years or so also may have to be elicited.
Lastly you told that the treating surgeon is not a qualified doctor? If so poor sterilization
of sharp instruments may be the source of infection.