Living With STD-Why A Positive STD Test May Be False ?
Why the test that comes back positive for STDs may not be positive at all I the main reason we’re talking about this what I’m finding in my practice. Ice practice and infectious diseases and women are that seven women are coming today many women are coming to me saying you know I’m sure that this can’t be right. I’m sure that that this test, whether it’s the middle of gonorrhea now syphilis, can’t be true, but I have positive test results in my hand. How can it be? And I’m saying that tests have just changed recently in the past few years. You get a culture for gonorrhea, a culture for chlamydia, and a different test for syphilis, and those tests would culture and grow the organism.
If this came from your body and it’s there, and you do have the disease, but now with automation, they’re trying to find cheaper and cheaper and easier ways to do testing on a large scale. So what happens is it becomes a statistic analyst and not a culture. They’re not coaching the organism what they do. They use various assays, and we call them nap assays or DNA probes, to look for a small DNA segment then multiply them a millionfold stick. A little light on it and then get a number, and then they take those numbers when they say the FDA says you have to be if you want this test to be out there you’ve got to be accurate 95%of the time, and so the tests are pretty accurate.
The problem is we study them and women and then at STD clinics in clinics where they have a high prevalence of the disease what they usually have it, so it’s probably true they have it, not that it’s an error the 5% error in that test however if you’re the average a woman or the average man. You get this test, and if it’s 95percent accurate, that means it’s 5%inaccurate, and the risk of having that disease is 5% then when you get a positive, it is the 5% inaccuracy of the test or the 5% that you have it.
So 50% of the time, it’s not right, and it’s only because we’re no longer culturing, and what we’re doing is just using statistical analysis to say it’s likely for you to have these. if this disease really what we’re now getting is not we’re not getting cultures anymore.
The actual disease we’re getting a likelihood and a risk organism we’re getting a piece of DNA that could be in that organism and interpreting it as though you have the bacteria if a person gets a STD diagnosis based on one of these cultures, what would you recommend they do well you know first that you need to entertain the idea that maybe you do have a STD and seek treatment and make sure your partner it gets treatment. Still, the other thing is if you don’t think it’s likely, you need to ask your doctor and say you know what tests that I get, and if it’s a culture, then it’s true.
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If it’s anything else then if then it’s what we call a screening test and ask them to confirm the test with the culture; unfortunately, it’s difficult to get cultures because everything’s automated now, and they’re Eul’s you do another screening test again and figure if both are wrong you we have it. Again, the word there’s probably unless you get a culture you don’t know for sure, and I wouldn’t ruin a marriage throw a guy out of the house over a screening test.
So realize that culture is diagnostic, but a screening test measures DNA right that’s typically in a bacteria that causes a problem. Still, it’s another thing too maybe they’re right you know that different the tests are different because of how large the sequence or how small the sequence is if the sequence is smaller, the sensitivity or the chance to pick it up is greater because you have more chances to pick it up. Still, if it’s so small that it’s also common with other problems or others that are non-STDs, then you have a false positive.
There’s a playoff with these different tests on which you’re sensitive to pick up an operon which are specific, and that’s why there are different tests and depending upon the laboratory and the cost of the tests. They choose the one they want to do, but the main thing, as we meant before it’s not a culture; it’s just a statistical predictive prediction that you have that disease unless you have a culture you can’t say for sure.
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