Thank you for your questions. First of all, the finalized version of the guidelines for HIV treatment are already available. There are three different treatment guidelines and recommendations in all. Therefore, some information may have already changed from the time they were published, to the time you read them. Also, opinions regarding when to start treatment, varies from one HIV expert to another.
Some genetic mutations cause drug resistance to just one drug.
Other genetic mutations can cause drug resistance to several drugs simultaneously. Because we now have multiple drugs against HIV, and because there are multiple mutations affecting drug resistance, there is no simple chart one can make to determine drug resistance. There is good news however. There are new tests available that can tell doctors exactly what drugs a person is already resistant to, and what drugs may work for them. This testing is called Genotyping.