None of the resistance tests are perfect. They cannot detect every mutation in your HIV or be used to predict exactly which drugs will work for you. However, they are quickly becoming another tool to determine treatment options in certain situations such as:
- In someone who is about to start HIV therapy for the first time and whose HIV viral load is greater than 1000
- In someone who was just infected with HIV, also called acute infection (testing is used to see if the person was infected with a drug-resistant strain)
- In someone who is failing his or her current regimen (testing is used to guide the choice of a new regimen)
- In a pregnant woman (testing is used to determine the best regimen to prevent mother-to-child HIV transmission)
All resistance tests that are taken after you have started HIV therapy should be taken while you are still on HIV drugs (or within 4 weeks after stopping a regimen that is failing) to get the best results.
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