1. Do antibodies cross react?
Sometimes but I don’t really know what to make of your testing. Are you sure there aren’t any labs in Australia that give index values on the herpes antibody test?
2. What should I make of the results?
I’m sorry I just don’t know. It sounds like you are positive now for both HSV one and two but without index values, I cannot say how accurate this might be. I sure wish I could help more with that question.
3. Should I go for another IgG test?
You could do it again and see what you get. I would stay off the Valtrex for a while. Another approach to this would be to stay off the Valtrex and let an outbreak happen and get that swab tested and typed.
Terri