I believe you would take teh 53 and divide it by 3 to get your Viral Load which would equal 17.6666. That is what I could tell from reading the conversion charts.
But I am gonna bump this one up and let the "pros" answer this. I could be completely off base. If anything, call your Dr and ask him (that's if you can get him or his nurse on the phone)!
Have a great day
Jules
Jules has it right
For converting numbers from eq to IU and vice versa, different labs use different conversion factors, in the range from 2 to 5 viruses per IU. If you do not know the factor that your lab uses, using a factor of three might be reasonable. That means: Viral loads given in eq/ml have to be divided by three to get the viral load in IU/ml. And, viral loads given in IU/ml have to be multiplied by three to get the result in eq/ml.
http://www.hepatitis.org.uk/s-crina/tests-pcr.htm