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ELISA Herpes test results- a different scale/index?
I took an ELISA test- positive for both hsv1 and hsv2. However, the results confuse me. All other results give a single score, with that score being placed on a scale. So, if someone scores below a 1 they're negative, with 1.1 - 3.5 being low positive and anything above that almost certainly positive.
My scores were different. First, the results I received only had 'positive' written next to the virus. I asked for more info and was grudgingly shown the following: for hsv2 a cut-off score was calculated (multiplying 0.945*0.1 and adding 0.145 to get a cutoff score of 0.239. Then, my own blood score was shown, indicating a 0.533 level. Being higher, I am considered positive. The cutoff for hsv1 was 0.1964 and my results was 0.773.
I've never seen this system before. At first, I thought the cutoff must mean 2.39, and therefore my hsv2 result is 5.33- definitely positive. This was presented as a strict cutoff: above definitely +, and equally below -But that doesn't make any sense, and I think there is some calculation missing from the lab report. Perhaps I need to divide my score by the cutoff? This may seem nitpicky, but I am asymptomatic, and have had hsv1 since youth, so it is important to me to know exactly what the score I got was by the index everyone else seems to use. This exam was in Mexico, using Human Diagnostics (a German company) ELISA test.
I am wading through technical literature I cannot understand for a formula that might not exist, so if anyone could shed some light on this issue it would be much appreciated. Thanks, Joe.
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