{"id":2001,"date":"2020-11-27T17:28:04","date_gmt":"2020-11-27T10:28:04","guid":{"rendered":"https:\/\/drsoaraweeurology.com\/?p=2001"},"modified":"2026-08-30T04:13:43","modified_gmt":"2026-08-29T21:13:43","slug":"%e1%9e%80%e1%9e%b6%e1%9e%9a%e1%9e%92%e1%9f%92%e1%9e%9c%e1%9e%be%e1%9e%8f%e1%9f%81%e1%9e%9f%e1%9f%92%e1%9e%8f%e1%9e%9a%e1%9f%84%e1%9e%82%e1%9e%9f%e1%9f%92%e1%9e%9c%e1%9e%b6%e1%9e%99-%e1%9e%97","status":"publish","type":"post","link":"https:\/\/drsoaraweeurology.com\/km\/2020\/11\/27\/syphilis-confusion-tests\/","title":{"rendered":"\u1780\u17b6\u179a\u1796\u1793\u17d2\u1799\u179b\u17cb\u17a2\u17c6\u1796\u17b8\u1780\u17b6\u179a\u1792\u17d2\u179c\u17be\u178f\u17c1\u179f\u17d2\u178f\u1788\u17b6\u1798\u179f\u17d2\u179c\u17b6\u1799\u17d6 \u17a0\u17c1\u178f\u17bb\u17a2\u17d2\u179c\u17b8\u1794\u17b6\u1793\u1787\u17b6\u1798\u17b6\u1793\u1796\u17b8\u179a\u1794\u17d2\u179a\u1797\u17c1\u1791"},"content":{"rendered":"\n<div class=\"wp-block-columns coblocks-author-columns has-background is-layout-flex wp-container-core-columns-is-layout-52275889 wp-block-columns-is-layout-flex\" style=\"background-color:#8C8C971A;padding-top:2.5rem;padding-right:2.5rem;padding-bottom:2.5rem;padding-left:2.5rem\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:25%\">\n<figure class=\"wp-block-image size-full is-style-rounded\"><img data-recalc-dims=\"1\" fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"800\" data-attachment-id=\"7037\" data-permalink=\"https:\/\/drsoaraweeurology.com\/km\/new-photo-2024\/\" data-orig-file=\"https:\/\/i0.wp.com\/drsoaraweeurology.com\/wp-content\/uploads\/2023\/12\/New-Photo-2024.png?fit=800%2C800&amp;ssl=1\" data-orig-size=\"800,800\" data-comments-opened=\"1\" data-image-title=\"Dr. Soarawee Weerasopone \u2014 Board-Certified Urologist in Bangkok, Thailand\" data-image-description=\"\" data-image-caption=\"&lt;p&gt;Dr. Soarawee Weerasopone \u2014 Board-Certified Urologist in Bangkok, Thailand&lt;\/p&gt;\n\" data-large-file=\"https:\/\/i0.wp.com\/drsoaraweeurology.com\/wp-content\/uploads\/2023\/12\/New-Photo-2024.png?fit=800%2C800&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/drsoaraweeurology.com\/wp-content\/uploads\/2023\/12\/New-Photo-2024.png?resize=800%2C800&#038;ssl=1\" alt=\"Dr. Soarawee Weerasopone \u2014 Board-Certified Urologist in Bangkok, Thailand\" class=\"wp-image-7037\" srcset=\"https:\/\/i0.wp.com\/drsoaraweeurology.com\/wp-content\/uploads\/2023\/12\/New-Photo-2024.png?w=800&amp;ssl=1 800w, https:\/\/i0.wp.com\/drsoaraweeurology.com\/wp-content\/uploads\/2023\/12\/New-Photo-2024.png?resize=300%2C300&amp;ssl=1 300w, https:\/\/i0.wp.com\/drsoaraweeurology.com\/wp-content\/uploads\/2023\/12\/New-Photo-2024.png?resize=150%2C150&amp;ssl=1 150w, https:\/\/i0.wp.com\/drsoaraweeurology.com\/wp-content\/uploads\/2023\/12\/New-Photo-2024.png?resize=768%2C768&amp;ssl=1 768w, https:\/\/i0.wp.com\/drsoaraweeurology.com\/wp-content\/uploads\/2023\/12\/New-Photo-2024.png?resize=12%2C12&amp;ssl=1 12w, https:\/\/i0.wp.com\/drsoaraweeurology.com\/wp-content\/uploads\/2023\/12\/New-Photo-2024.png?resize=600%2C600&amp;ssl=1 600w, https:\/\/i0.wp.com\/drsoaraweeurology.com\/wp-content\/uploads\/2023\/12\/New-Photo-2024.png?resize=400%2C400&amp;ssl=1 400w, https:\/\/i0.wp.com\/drsoaraweeurology.com\/wp-content\/uploads\/2023\/12\/New-Photo-2024.png?resize=200%2C200&amp;ssl=1 200w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:75%\">\n<p class=\"wp-block-paragraph\"><strong><a href=\"https:\/\/drsoaraweeurology.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">Soarawee Weerasopone, Urologist<\/a><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.bangkokhospital.com\/en\/bangkok\/doctor\/dr-soarawee-weerasopone-2\" target=\"_blank\" rel=\"noreferrer noopener\">Bangkok hospital Headquarter, Bangkok<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"tel:+66880221445\" target=\"_blank\" rel=\"noreferrer noopener\">Samitivej Sriracha Hospital \u2014 Urology department: <strong>088-022-1445<\/strong><\/a><\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button is-style-outline is-style-outline--1\"><a class=\"wp-block-button__link has-background-background-color has-text-color has-background has-link-color has-small-font-size has-custom-font-size wp-element-button\" href=\"https:\/\/www.bangkokhospital.com\/en\/bangkok\/doctor\/dr-soarawee-weerasopone-2\" style=\"color:#1b4965\" target=\"_blank\" rel=\"noreferrer noopener\">Book a Consultation<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<ul class=\"wp-block-social-links aligncenter has-normal-icon-size is-style-default coblocks-animate is-content-justification-center is-layout-flex wp-container-core-social-links-is-layout-3e41869c wp-block-social-links-is-layout-flex\"><li class=\"wp-social-link wp-social-link-wordpress wp-block-social-link\"><a href=\"https:\/\/drsoaraweeurology.com\/\" class=\"wp-block-social-link-anchor\"><svg width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" version=\"1.1\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M12.158,12.786L9.46,20.625c0.806,0.237,1.657,0.366,2.54,0.366c1.047,0,2.051-0.181,2.986-0.51 c-0.024-0.038-0.046-0.079-0.065-0.124L12.158,12.786z M3.009,12c0,3.559,2.068,6.634,5.067,8.092L3.788,8.341 C3.289,9.459,3.009,10.696,3.009,12z M18.069,11.546c0-1.112-0.399-1.881-0.741-2.48c-0.456-0.741-0.883-1.368-0.883-2.109 c0-0.826,0.627-1.596,1.51-1.596c0.04,0,0.078,0.005,0.116,0.007C16.472,3.904,14.34,3.009,12,3.009 c-3.141,0-5.904,1.612-7.512,4.052c0.211,0.007,0.41,0.011,0.579,0.011c0.94,0,2.396-0.114,2.396-0.114 C7.947,6.93,8.004,7.642,7.52,7.699c0,0-0.487,0.057-1.029,0.085l3.274,9.739l1.968-5.901l-1.401-3.838 C9.848,7.756,9.389,7.699,9.389,7.699C8.904,7.67,8.961,6.93,9.446,6.958c0,0,1.484,0.114,2.368,0.114 c0.94,0,2.397-0.114,2.397-0.114c0.485-0.028,0.542,0.684,0.057,0.741c0,0-0.488,0.057-1.029,0.085l3.249,9.665l0.897-2.996 C17.841,13.284,18.069,12.316,18.069,11.546z M19.889,7.686c0.039,0.286,0.06,0.593,0.06,0.924c0,0.912-0.171,1.938-0.684,3.22 l-2.746,7.94c2.673-1.558,4.47-4.454,4.47-7.771C20.991,10.436,20.591,8.967,19.889,7.686z M12,22C6.486,22,2,17.514,2,12 C2,6.486,6.486,2,12,2c5.514,0,10,4.486,10,10C22,17.514,17.514,22,12,22z\"><\/path><\/svg><span class=\"wp-block-social-link-label screen-reader-text\">WordPress<\/span><\/a><\/li>\n\n<li class=\"wp-social-link wp-social-link-linkedin wp-block-social-link\"><a href=\"https:\/\/www.linkedin.com\/in\/soarawee-weerasopone\/\" class=\"wp-block-social-link-anchor\"><svg width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" version=\"1.1\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M19.7,3H4.3C3.582,3,3,3.582,3,4.3v15.4C3,20.418,3.582,21,4.3,21h15.4c0.718,0,1.3-0.582,1.3-1.3V4.3 C21,3.582,20.418,3,19.7,3z M8.339,18.338H5.667v-8.59h2.672V18.338z M7.004,8.574c-0.857,0-1.549-0.694-1.549-1.548 c0-0.855,0.691-1.548,1.549-1.548c0.854,0,1.547,0.694,1.547,1.548C8.551,7.881,7.858,8.574,7.004,8.574z M18.339,18.338h-2.669 v-4.177c0-0.996-0.017-2.278-1.387-2.278c-1.389,0-1.601,1.086-1.601,2.206v4.249h-2.667v-8.59h2.559v1.174h0.037 c0.356-0.675,1.227-1.387,2.526-1.387c2.703,0,3.203,1.779,3.203,4.092V18.338z\"><\/path><\/svg><span class=\"wp-block-social-link-label screen-reader-text\">LinkedIn<\/span><\/a><\/li>\n\n<li class=\"wp-social-link wp-social-link-mail wp-block-social-link\"><a href=\"mailto:bhquro@bdms.co.th\" class=\"wp-block-social-link-anchor\"><svg width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" version=\"1.1\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M19,5H5c-1.1,0-2,.9-2,2v10c0,1.1.9,2,2,2h14c1.1,0,2-.9,2-2V7c0-1.1-.9-2-2-2zm.5,12c0,.3-.2.5-.5.5H5c-.3,0-.5-.2-.5-.5V9.8l7.5,5.6,7.5-5.6V17zm0-9.1L12,13.6,4.5,7.9V7c0-.3.2-.5.5-.5h14c.3,0,.5.2.5.5v.9z\"><\/path><\/svg><span class=\"wp-block-social-link-label screen-reader-text\">Mail<\/span><\/a><\/li><\/ul>\n\n\n\n<style>\n\/* Hover effect for Social Dr Pom Block - Social Icons *\/\n.wp-block-social-links .wp-social-link {\n  transition: transform 0.2s ease, opacity 0.2s ease !important;\n}\n.wp-block-social-links .wp-social-link:hover {\n  transform: scale(1.15);\n  opacity: 0.9;\n}\n<\/style>\n\n<div class=\"dr-pom-academic-icons\" style=\"display: flex; gap: 16px; margin-top: 12px; align-items: center; justify-content: center;\">\n  \n  <a href=\"https:\/\/www.researchgate.net\/profile\/Soarawee-Weerasopone\" \n     target=\"_blank\" \n     rel=\"noopener\"\n     title=\"ResearchGate Profile\"\n     aria-label=\"View ResearchGate Profile\"\n     style=\"text-decoration: none; color: #00CCBB; transition: transform 0.2s; display: inline-block;\"\n     onmouseover=\"this.style.transform='scale(1.15)'\"\n     onmouseout=\"this.style.transform='scale(1)'\">\n    <svg width=\"28\" height=\"28\" viewBox=\"0 0 24 24\" fill=\"currentColor\">\n      <path d=\"M19.586 0c-.818 0-1.508.19-2.073.565-.563.377-.97.936-1.213 1.68a3.193 3.193 0 0 0-.112.437 8.365 8.365 0 0 0-.078.53 9 9 0 0 0-.05.727c-.01.282-.013.621-.013 1.016a31.121 31.121 0 0 0 .014 1.017 9 9 0 0 0 .05.727 7.946 7.946 0 0 0 .077.53h.001c.024.115.06.262.112.438.243.743.65 1.303 1.213 1.68.565.376 1.255.564 2.073.564.8 0 1.536-.213 2.105-.603.57-.39.94-.916 1.175-1.65.076-.235.135-.558.177-.93a15.4 15.4 0 0 0 .063-1.207v-.512a.27.27 0 0 0-.273-.273h-2.95a.27.27 0 0 0-.274.273v.785c0 .228.0.343.273.343h1.337c.094 0 .14.045.14.137 0 .61-.063 1.043-.155 1.318-.182.546-.7 1.018-1.683 1.018-.654 0-1.135-.114-1.475-.356-.34-.244-.55-.585-.658-1.024a3.797 3.797 0 0 1-.111-.43 5.515 5.515 0 0 1-.06-.51 19.85 19.85 0 0 1-.025-.726c-.004-.28-.004-.628-.004-1.045 0-.418 0-.766.004-1.046a19.85 19.85 0 0 1 .025-.726 5.475 5.475 0 0 1 .06-.51 3.785 3.785 0 0 1 .111-.43c.108-.44.318-.78.658-1.024.34-.243.82-.357 1.475-.357.6 0 1.064.078 1.413.293.347.215.595.515.74.91.063.155.166.21.31.156l.967-.4c.15-.058.187-.18.13-.32a3.025 3.025 0 0 0-1.262-1.452C21.12.218 20.428.0 19.586 0zM8.512 4.32c-2.7 0-4.066.997-4.066 3.06v.04c0 1.92.992 2.83 3.046 2.83 1.27 0 2.038-.39 2.385-1.05h.13l.067.51c.04.2.207.34.41.34h.99V7.95c0-2.59-1.06-3.63-2.962-3.63zm-.18 1.61c1.118 0 1.628.56 1.628 1.86v.4l-1.65.16c-1.35.13-1.86.46-1.86 1.13v.04c0 .67.41 1.06 1.45 1.06.85 0 1.55-.32 1.93-.84.04-.06.13-.07.18-.02.05.03.07.1.07.16v.43c0 .26.13.42.34.42h1.05c.21 0 .34-.16.34-.42v-3.6c0-1.94-1.13-2.83-3.46-2.83-1.94 0-3.07.86-3.4 2.04l1.55.45c.18-.69.6-1.04 1.83-1.04zM2.135 16.314c-.587 0-1.066-.156-1.434-.469-.367-.312-.618-.704-.752-1.176-.034-.124-.061-.232-.082-.327a3.794 3.794 0 0 1-.044-.366 8.83 8.83 0 0 1-.022-.547C0 13.221 0 12.985 0 12.704c0-.281 0-.515.001-.704a8.81 8.81 0 0 1 .022-.547 3.802 3.802 0 0 1 .044-.366c.02-.094.048-.203.082-.328.134-.471.385-.864.752-1.176.368-.313.847-.469 1.434-.469.477 0 .892.087 1.246.262.353.175.622.443.806.804.044.083.083.157.117.222.034.066.069.144.105.235.022.054.011.099-.034.135l-.66.292c-.045.027-.082.013-.112-.045a4.043 4.043 0 0 0-.155-.27 1.247 1.247 0 0 0-.49-.495c-.225-.131-.522-.196-.892-.196-.402 0-.726.064-.972.193-.247.13-.422.302-.527.518-.027.045-.054.099-.082.16a1.39 1.39 0 0 0-.067.197 2.46 2.46 0 0 0-.05.282 5.51 5.51 0 0 0-.033.43c-.008.17-.013.376-.013.617 0 .242.005.448.013.618.008.17.02.314.034.43.013.117.03.21.05.282.02.072.042.137.066.197.105.216.28.39.527.518.246.13.57.193.972.193.4 0 .714-.07.94-.21.227-.14.394-.346.503-.617a2.43 2.43 0 0 0 .104-.395c.018-.123.027-.282.027-.477V13.2H2.34c-.04 0-.06-.02-.06-.062v-.5c0-.04.02-.062.06-.062h1.812c.04 0 .062.02.062.06v.5c0 .156-.005.296-.014.422a4.71 4.71 0 0 1-.04.342 1.732 1.732 0 0 1-.064.262c-.13.523-.402.913-.815 1.17-.413.255-.95.382-1.61.382z\"\/>\n    <\/svg>\n  <\/a>\n  \n  <a href=\"https:\/\/orcid.org\/0009-0004-8387-3559\" \n     target=\"_blank\" \n     rel=\"noopener\"\n     title=\"ORCID iD\"\n     aria-label=\"View ORCID Profile\"\n     style=\"text-decoration: none; color: #A6CE39; transition: transform 0.2s; display: inline-block;\"\n     onmouseover=\"this.style.transform='scale(1.15)'\"\n     onmouseout=\"this.style.transform='scale(1)'\">\n    <svg width=\"28\" height=\"28\" viewBox=\"0 0 24 24\" fill=\"currentColor\">\n      <path d=\"M12 0C5.372 0 0 5.372 0 12s5.372 12 12 12 12-5.372 12-12S18.628 0 12 0zM7.369 4.378c.525 0 .947.431.947.947 0 .525-.422.947-.947.947-.525 0-.946-.422-.946-.947 0-.525.421-.947.946-.947zm-.722 3.038h1.444v10.041H6.647V7.416zm3.562 0h3.9c3.712 0 5.344 2.653 5.344 5.025 0 2.578-2.016 5.025-5.325 5.025h-3.919V7.416zm1.444 1.303v7.444h2.297c3.272 0 4.022-2.484 4.022-3.722 0-2.016-1.284-3.722-4.097-3.722h-2.222z\"\/>\n    <\/svg>\n  <\/a>\n  \n  <a href=\"https:\/\/scholar.google.com\/citations?user=lTgsRMUAAAAJ&#038;hl=en\" \n     target=\"_blank\" \n     rel=\"noopener\"\n     title=\"Google Scholar\"\n     aria-label=\"View Google Scholar Profile\"\n     style=\"text-decoration: none; color: #4285F4; transition: transform 0.2s; display: inline-block;\"\n     onmouseover=\"this.style.transform='scale(1.15)'\"\n     onmouseout=\"this.style.transform='scale(1)'\">\n    <svg width=\"28\" height=\"28\" viewBox=\"0 0 24 24\" fill=\"currentColor\">\n      <path d=\"M5.242 13.769L0.5 9.5 12 1l11.5 8.5-4.742 4.269C17.548 11.249 14.978 9.5 12 9.5c-2.977 0-5.548 1.748-6.758 4.269zM12 10a7 7 0 1 0 0 14 7 7 0 0 0 0-14z\"\/>\n    <\/svg>\n  <\/a>\n  \n<\/div>\n\n\n\n<p class=\"has-drop-cap wp-block-paragraph\">Syphilis is one of the sexually transmitted infections I see regularly. How it presents depends on the stage \u2014 a painless genital ulcer early on, a rash on the palms and soles later. A blood test is the only way to confirm the diagnosis, and that is where the confusion starts, because <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/27606153\/\">there are two different families of blood test<\/a> and each has its own strengths and limits.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This matters more than a technical detail. Patients who receive a positive result without a full explanation often leave badly frightened, and end up going from clinic to clinic looking for a second opinion that says something different. Understanding what each test actually measures usually removes the fear entirely.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img data-recalc-dims=\"1\" decoding=\"async\" width=\"800\" height=\"532\" data-attachment-id=\"2012\" data-permalink=\"https:\/\/drsoaraweeurology.com\/km\/2020\/11\/27\/syphilis-confusion-tests\/close-up-of-doctor-hand-holding-blood-sample-copy-space\/\" data-orig-file=\"https:\/\/i0.wp.com\/drsoaraweeurology.com\/wp-content\/uploads\/2020\/11\/Blood-test.jpg?fit=1200%2C798&amp;ssl=1\" data-orig-size=\"1200,798\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;4&quot;,&quot;credit&quot;:&quot;NATHAPHAT&quot;,&quot;camera&quot;:&quot;NIKON Z 6&quot;,&quot;caption&quot;:&quot;Close up of doctor hand holding blood sample. Copy space.&quot;,&quot;created_timestamp&quot;:&quot;1572076848&quot;,&quot;copyright&quot;:&quot;NAMPIX&quot;,&quot;focal_length&quot;:&quot;105&quot;,&quot;iso&quot;:&quot;100&quot;,&quot;shutter_speed&quot;:&quot;0.1&quot;,&quot;title&quot;:&quot;Close up of doctor hand holding blood sample. Copy space.&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"The only way for making syphilis diagnosis is blood test\" data-image-description=\"\" data-image-caption=\"&lt;p&gt;The only way for making syphilis diagnosis is blood test &lt;\/p&gt;\n\" data-large-file=\"https:\/\/i0.wp.com\/drsoaraweeurology.com\/wp-content\/uploads\/2020\/11\/Blood-test.jpg?fit=800%2C532&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/drsoaraweeurology.com\/wp-content\/uploads\/2020\/11\/Blood-test.jpg?resize=800%2C532&#038;ssl=1\" alt=\"A blood sample being taken for syphilis serology testing\" class=\"wp-image-2012\" srcset=\"https:\/\/i0.wp.com\/drsoaraweeurology.com\/wp-content\/uploads\/2020\/11\/Blood-test.jpg?w=1200&amp;ssl=1 1200w, https:\/\/i0.wp.com\/drsoaraweeurology.com\/wp-content\/uploads\/2020\/11\/Blood-test.jpg?resize=300%2C200&amp;ssl=1 300w, https:\/\/i0.wp.com\/drsoaraweeurology.com\/wp-content\/uploads\/2020\/11\/Blood-test.jpg?resize=1024%2C681&amp;ssl=1 1024w, https:\/\/i0.wp.com\/drsoaraweeurology.com\/wp-content\/uploads\/2020\/11\/Blood-test.jpg?resize=768%2C511&amp;ssl=1 768w, https:\/\/i0.wp.com\/drsoaraweeurology.com\/wp-content\/uploads\/2020\/11\/Blood-test.jpg?resize=16%2C12&amp;ssl=1 16w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\">A blood test is the only way to confirm a diagnosis of syphilis.<\/figcaption><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">1. Nontreponemal tests \u2014 the screening tests<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">These are used first, when syphilis is suspected. Their strength is that they reflect <strong>active<\/strong> infection, which also makes them the tests used to check whether treatment is working.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>VDRL (Venereal Disease Research Laboratory)<\/li>\n\n\n\n<li>RPR (Rapid Plasma Reagin)<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Their weakness is that they can turn positive when there is no syphilis at all \u2014 a <a href=\"https:\/\/drsoaraweeurology.com\/2021\/10\/22\/vdrl-false-positive-test-causes\/\">biological false positive<\/a>, which several other conditions can cause. That is precisely why a positive screening test is never the end of the story. They can also read falsely negative very early in infection, before antibodies have developed, so a recent exposure with a negative result may need repeating.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">2. Treponemal tests \u2014 the confirmation tests<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">If a VDRL or RPR comes back positive, the diagnosis has to be confirmed with a treponemal test.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>TP-PA (Treponema Pallidum Particle Agglutination)<\/li>\n\n\n\n<li>FTA-ABS (Fluorescent Treponemal Antibody Absorbed)<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">These are highly accurate for syphilis. Their limitation is the one that causes the most distress: <strong>a treponemal test stays positive for the rest of your life, even after the infection has been completely cured.<\/strong> It tells you that you have encountered syphilis at some point \u2014 not that you have it now. This is why treatment can never be judged by a treponemal test alone.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">One practical note, because it confuses people who compare results between hospitals: <strong>some laboratories now run the two in the opposite order<\/strong>, using an automated treponemal test as the initial screen and then adding a VDRL or RPR afterwards. If your treponemal test came back first, that is a laboratory workflow rather than a mistake. The logic of interpreting the pair together does not change.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Reading the two together<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">The practical rule is simple once you have it: the <strong>confirmation test answers whether it was ever syphilis<\/strong>, and the <strong>screening test answers whether it is active now and whether the treatment is working<\/strong>. Treatment response is followed by watching the VDRL or RPR titre fall over the months after treatment. A permanently positive treponemal test alongside a falling titre is exactly what a successfully treated patient looks like.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img data-recalc-dims=\"1\" decoding=\"async\" width=\"800\" height=\"800\" data-attachment-id=\"2014\" data-permalink=\"https:\/\/drsoaraweeurology.com\/km\/2020\/11\/27\/syphilis-confusion-tests\/happy-doctor\/\" data-orig-file=\"https:\/\/i0.wp.com\/drsoaraweeurology.com\/wp-content\/uploads\/2020\/11\/Happy-doctor.jpg?fit=1200%2C1200&amp;ssl=1\" data-orig-size=\"1200,1200\" data-comments-opened=\"1\" data-image-meta=\"{&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"Good understanding about the tests bring the best outcome and strengthen Doctor-Patient relationship\" data-image-description=\"\" data-image-caption=\"&lt;p&gt;Good understanding about the tests bring the best outcome and strengthen Doctor-Patient relationship&lt;\/p&gt;\n\" data-large-file=\"https:\/\/i0.wp.com\/drsoaraweeurology.com\/wp-content\/uploads\/2020\/11\/Happy-doctor.jpg?fit=800%2C800&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/drsoaraweeurology.com\/wp-content\/uploads\/2020\/11\/Happy-doctor.jpg?resize=800%2C800&#038;ssl=1\" alt=\"A doctor explaining syphilis blood test results to a patient during consultation\" class=\"wp-image-2014\" srcset=\"https:\/\/i0.wp.com\/drsoaraweeurology.com\/wp-content\/uploads\/2020\/11\/Happy-doctor.jpg?w=1200&amp;ssl=1 1200w, https:\/\/i0.wp.com\/drsoaraweeurology.com\/wp-content\/uploads\/2020\/11\/Happy-doctor.jpg?resize=300%2C300&amp;ssl=1 300w, https:\/\/i0.wp.com\/drsoaraweeurology.com\/wp-content\/uploads\/2020\/11\/Happy-doctor.jpg?resize=1024%2C1024&amp;ssl=1 1024w, https:\/\/i0.wp.com\/drsoaraweeurology.com\/wp-content\/uploads\/2020\/11\/Happy-doctor.jpg?resize=150%2C150&amp;ssl=1 150w, https:\/\/i0.wp.com\/drsoaraweeurology.com\/wp-content\/uploads\/2020\/11\/Happy-doctor.jpg?resize=768%2C768&amp;ssl=1 768w, https:\/\/i0.wp.com\/drsoaraweeurology.com\/wp-content\/uploads\/2020\/11\/Happy-doctor.jpg?resize=12%2C12&amp;ssl=1 12w, https:\/\/i0.wp.com\/drsoaraweeurology.com\/wp-content\/uploads\/2020\/11\/Happy-doctor.jpg?resize=800%2C800&amp;ssl=1 800w, https:\/\/i0.wp.com\/drsoaraweeurology.com\/wp-content\/uploads\/2020\/11\/Happy-doctor.jpg?resize=400%2C400&amp;ssl=1 400w, https:\/\/i0.wp.com\/drsoaraweeurology.com\/wp-content\/uploads\/2020\/11\/Happy-doctor.jpg?resize=200%2C200&amp;ssl=1 200w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\">Understanding the tests removes most of the fear that a positive result causes.<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Two practical points that follow from all this. A confirmed diagnosis means <strong>current sexual partners need testing and treatment as well<\/strong>, whatever your own result now shows. And because syphilis travels in company, testing for other sexually transmitted infections at the same time is standard rather than an extra.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Three things that must not be left out of the conversation<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>HIV testing.<\/strong> Syphilis and HIV travel together more closely than any other pair in this field: the ulcer of early syphilis breaks the skin barrier and raises the risk of acquiring HIV, and the two are frequently diagnosed in the same person. An HIV test belongs with a syphilis diagnosis as a matter of routine, not suspicion. HIV testing is not carried out in the urology clinic here \u2014 at Bangkok Hospital Headquarters it is handled by the Infectious Diseases department, and I refer patients there. Testing and treatment for other sexually transmitted infections, and HPV vaccination, are available with me.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Pregnancy.<\/strong> If you are pregnant, may be pregnant, or your partner is, this changes from a matter about you to a matter about the baby. Syphilis crosses the placenta and can cause serious harm to an unborn child, and it is one of the few such infections that is almost entirely preventable \u2014 treatment during pregnancy protects the baby. Antenatal screening exists precisely for this reason. Tell your obstetric team, and do it early, because the timing of treatment during pregnancy affects how well the baby is protected.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Symptoms in the eyes, ears or nervous system.<\/strong> Syphilis can affect these at any stage, not only late in the disease, and when it does the treatment is different and more intensive. <strong>Seek assessment the same day \u2014 in Thailand you can call 1669 \u2014 for any change in vision, new eye pain or redness, new hearing loss, ringing in the ears or vertigo, severe headache with neck stiffness, or new weakness, numbness or confusion.<\/strong> Eyesight in particular can be lost, and the window to protect it is short. Say that you have syphilis, or a positive syphilis test, when you arrive \u2014 it is the single piece of information that changes what happens next.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Syphilis is a very treatable infection \u2014 <a href=\"https:\/\/drsoaraweeurology.com\/2021\/10\/08\/syphilis-correct-way-deal-with\/\">treatment is straightforward when it is done correctly<\/a>. What turns it into a frightening experience is usually not the disease but the test results arriving without an explanation. If you have a positive result and nobody has walked you through what it means, ask. Once you can read your own results, the panic tends to disappear.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you have concerns about syphilis blood test results or need diagnosis and treatment for a sexually transmitted infection, Dr. Soarawee Weerasopone offers confidential specialist consultations at Bangkok Hospital Headquarters. <a href=\"https:\/\/www.bangkokhospital.com\/en\/bangkok\/doctor\/dr-soarawee-weerasopone-2\" target=\"_blank\" rel=\"noreferrer noopener\">Book a Consultation<\/a>. Appointments at Samitivej Sriracha Hospital can be arranged by calling the Urology department on <a href=\"tel:0880221445\">088-022-1445<\/a>. Questions about the cost of testing or treatment should go to the hospital directly \u2014 for Bangkok Hospital, by email to <a href=\"mailto:bhquro@bdms.co.th\">bhquro@bdms.co.th<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Frequently Asked Questions about Syphilis Blood Tests<\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1\"><strong class=\"schema-faq-question\">What is the difference between nontreponemal and treponemal syphilis tests?<\/strong> <p class=\"schema-faq-answer\">Nontreponemal tests (VDRL, RPR) are used as screening tests to detect active syphilis infection and to monitor treatment response. Treponemal tests (TP-PA, FTA-ABS) are confirmation tests that are highly specific for syphilis but remain positive for life even after successful treatment, so they cannot be used alone to assess treatment outcome.<\/p><\/div> <div class=\"schema-faq-section\" id=\"faq-question-2\"><strong class=\"schema-faq-question\">If my VDRL or RPR is positive, does it mean I have syphilis?<\/strong> <p class=\"schema-faq-answer\">A positive VDRL or RPR is a strong indicator but not a definitive diagnosis. These screening tests can occasionally produce false positives due to other conditions such as autoimmune diseases or viral infections. A confirmatory treponemal test (TP-PA or FTA-ABS) is always required to make a definitive diagnosis of syphilis.<\/p><\/div> <div class=\"schema-faq-section\" id=\"faq-question-3\"><strong class=\"schema-faq-question\">Why does my treponemal test stay positive even after treatment?<\/strong> <p class=\"schema-faq-answer\">Treponemal tests detect specific antibodies against the syphilis bacterium that persist in the bloodstream for life once produced, even after the infection has been completely cured. This is a normal finding and does not mean the infection is still active. Treatment success is monitored using nontreponemal tests (VDRL or RPR), which should show a declining titer after effective treatment.<\/p><\/div> <div class=\"schema-faq-section\" id=\"faq-question-4\"><strong class=\"schema-faq-question\">How do doctors know if syphilis treatment is working?<\/strong> <p class=\"schema-faq-answer\">Treatment response is tracked by monitoring the VDRL or RPR titer over time. After successful treatment, the nontreponemal titer should decrease fourfold or more within 6&#8211;12 months. A stable or rising titer may indicate treatment failure or reinfection, requiring further evaluation by a specialist.<\/p><\/div> <div class=\"schema-faq-section\" id=\"faq-question-5\"><strong class=\"schema-faq-question\">My treponemal test came back before the VDRL. Is that wrong?<\/strong> <p class=\"schema-faq-answer\">No. Some laboratories now run an automated treponemal test as the initial screen and add a VDRL or RPR afterwards, which is the reverse of the traditional order. This is a laboratory workflow rather than an error, and it does not change how the two results are interpreted together: the treponemal test answers whether it was ever syphilis, and the nontreponemal titre answers whether it is active now and whether treatment is working.<\/p><\/div> <div class=\"schema-faq-section\" id=\"faq-question-6\"><strong class=\"schema-faq-question\">Should I be tested for HIV and other infections too?<\/strong> <p class=\"schema-faq-answer\">Yes. Syphilis and HIV are closely linked: the ulcer of early syphilis breaks the skin barrier and raises the risk of acquiring HIV, and the two are frequently found in the same person. An HIV test belongs with a syphilis diagnosis as routine rather than as a matter of suspicion, and testing for other sexually transmitted infections at the same time is standard. HIV testing is not performed in the urology clinic; at Bangkok Hospital Headquarters it is handled by the Infectious Diseases department and patients are referred there. Testing and treatment for other sexually transmitted infections, and HPV vaccination, are available in the urology clinic.<\/p><\/div> <div class=\"schema-faq-section\" id=\"faq-question-7\"><strong class=\"schema-faq-question\">I am pregnant, or my partner is. Does that change anything?<\/strong> <p class=\"schema-faq-answer\">Considerably. Syphilis crosses the placenta and can seriously harm an unborn child, and it is one of the few such infections that is almost entirely preventable, because treatment during pregnancy protects the baby. Antenatal screening exists for exactly this reason. Tell your obstetric team early, since the timing of treatment in pregnancy affects how well the baby is protected. This applies equally when it is the partner who has tested positive.<\/p><\/div> <div class=\"schema-faq-section\" id=\"faq-question-8\"><strong class=\"schema-faq-question\">Which symptoms need urgent attention?<\/strong> <p class=\"schema-faq-answer\">Syphilis can affect the eyes, ears and nervous system at any stage, not only late in the disease, and when it does the treatment is different and more intensive. Seek assessment the same day for any change in vision, new eye pain or redness, new hearing loss, ringing in the ears or vertigo, severe headache with neck stiffness, or new weakness, numbness or confusion. Eyesight in particular can be lost and the window to protect it is short. State that you have syphilis or a positive syphilis test on arrival, because that is the information that changes what happens next. In Thailand the emergency number is 1669.<\/p><\/div> <div class=\"schema-faq-section\" id=\"faq-question-9\"><strong class=\"schema-faq-question\">Is syphilis curable?<\/strong> <p class=\"schema-faq-answer\">Yes, syphilis is highly curable, especially when diagnosed and treated early. The standard treatment is penicillin G injection, with the dose and duration depending on the stage of infection. Early diagnosis, correct treatment, and regular follow-up blood tests are essential to ensure complete cure and prevent complications or transmission to partners. Current sexual partners should be tested and treated as well.<\/p><\/div> <div class=\"schema-faq-section\" id=\"faq-question-10\"><strong class=\"schema-faq-question\">Can I go through my results by video consultation?<\/strong> <p class=\"schema-faq-answer\">Yes, and it suits this situation particularly well, because the main task is explaining results you already hold. Bangkok Hospital Headquarters offers a Telemedicine service, arranged in advance by email to the Urology department at bhquro@bdms.co.th. Send the actual laboratory report rather than a summary, including the titre and the date, since the numbers and their trend are what the interpretation rests on. Treatment itself is given by injection and must be done in person. Samitivej Sriracha is in-person only, booked through the Urology department line 088-022-1445.<\/p><\/div><\/div>\n\n\n\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@graph\": [\n    {\n      \"@type\": \"MedicalWebPage\",\n      \"@id\": \"https:\/\/drsoaraweeurology.com\/2020\/11\/27\/syphilis-confusion-tests\/#webpage\",\n      \"url\": \"https:\/\/drsoaraweeurology.com\/2020\/11\/27\/syphilis-confusion-tests\/\",\n      \"name\": \"Syphilis Blood Tests Explained: Why There Are Two Kinds\",\n      \"description\": \"Why syphilis needs two different families of blood test: nontreponemal screening tests (VDRL, RPR) that reflect active infection and track treatment, and treponemal confirmation tests (TP-PA, FTA-ABS) that stay positive for life. How to read them together, why HIV testing and pregnancy matter, and which symptoms need same-day assessment.\",\n      \"inLanguage\": \"en\",\n      \"datePublished\": \"2020-11-27\",\n      \"dateModified\": \"2026-08-30\",\n      \"lastReviewed\": \"2026-08-30\",\n      \"specialty\": \"https:\/\/schema.org\/Urologic\",\n      \"medicalAudience\": { \"@type\": \"MedicalAudience\", \"audienceType\": \"Patient\" },\n      \"isPartOf\": { \"@id\": \"https:\/\/drsoaraweeurology.com\/#website\" },\n      \"author\": { \"@id\": \"https:\/\/drsoaraweeurology.com\/#physician\" },\n      \"reviewedBy\": { \"@id\": \"https:\/\/drsoaraweeurology.com\/#physician\" },\n      \"publisher\": { \"@id\": \"https:\/\/drsoaraweeurology.com\/#physician\" },\n      \"disambiguatingDescription\": \"HIV testing and pre- or post-exposure prophylaxis are not provided in this urology clinic; at Bangkok Hospital Headquarters HIV is managed by the Infectious Diseases department and patients are referred there. Testing and treatment for other sexually transmitted infections, and HPV vaccination, are provided.\",\n      \"about\": { \"@id\": \"https:\/\/drsoaraweeurology.com\/2020\/11\/27\/syphilis-confusion-tests\/#syphilis\" }\n    },\n    {\n      \"@type\": \"MedicalTest\",\n      \"@id\": \"https:\/\/drsoaraweeurology.com\/2020\/11\/27\/syphilis-confusion-tests\/#nontreponemal\",\n      \"name\": \"Nontreponemal syphilis tests (VDRL, RPR)\",\n      \"description\": \"Screening tests used first when syphilis is suspected. They reflect active infection, which is why they are also used to judge whether treatment is working: after effective treatment the titre should fall fourfold or more within 6 to 12 months, while a stable or rising titre suggests treatment failure or reinfection. They can produce a biological false positive in the absence of syphilis, which is why a positive result always requires confirmation, and they can read falsely negative very early in infection before antibodies have developed. Some laboratories reverse the sequence and screen with an automated treponemal assay first, adding the nontreponemal titre afterwards; this is a workflow difference rather than an error.\",\n      \"usedToDiagnose\": {\n        \"@type\": \"MedicalCondition\",\n        \"name\": \"Syphilis\"\n      }\n    },\n    {\n      \"@type\": \"MedicalTest\",\n      \"@id\": \"https:\/\/drsoaraweeurology.com\/2020\/11\/27\/syphilis-confusion-tests\/#treponemal\",\n      \"name\": \"Treponemal syphilis tests (TP-PA, FTA-ABS)\",\n      \"description\": \"Confirmation tests, highly specific for syphilis, performed after a positive screening test. Their key limitation is that they remain positive for life even after the infection has been completely cured, so a positive result means the person has encountered syphilis at some point rather than that they have it now. Treatment response can never be judged from a treponemal test alone. A permanently positive treponemal test alongside a falling nontreponemal titre is what a successfully treated patient looks like.\",\n      \"usedToDiagnose\": {\n        \"@type\": \"MedicalCondition\",\n        \"name\": \"Syphilis\"\n      }\n    },\n    {\n      \"@type\": \"MedicalCondition\",\n      \"@id\": \"https:\/\/drsoaraweeurology.com\/2020\/11\/27\/syphilis-confusion-tests\/#syphilis\",\n      \"name\": \"Syphilis\",\n      \"description\": \"A sexually transmitted bacterial infection whose presentation depends on the stage: a painless genital ulcer early on, a rash on the palms and soles later. It is highly curable, particularly when diagnosed early. Diagnosis requires blood testing, and a confirmed diagnosis means current sexual partners need testing and treatment as well. Testing for other sexually transmitted infections at the same time is standard.\",\n      \"signOrSymptom\": [\n        {\"@type\": \"MedicalSignOrSymptom\", \"name\": \"Painless genital ulcer in early infection\"},\n        {\"@type\": \"MedicalSignOrSymptom\", \"name\": \"Rash on the palms and soles in later infection\"}\n      ],\n      \"possibleComplication\": [\n        {\"@type\": \"MedicalEntity\", \"name\": \"Ocular syphilis: any change in vision, new eye pain or redness requires same-day assessment, as sight can be lost and the window to protect it is short. It can occur at any stage and alters treatment to a more intensive regimen\"},\n        {\"@type\": \"MedicalEntity\", \"name\": \"Otosyphilis: new hearing loss, tinnitus or vertigo, also requiring same-day assessment and altering treatment\"},\n        {\"@type\": \"MedicalEntity\", \"name\": \"Neurosyphilis: severe headache with neck stiffness, new weakness, numbness or confusion, at any stage of infection\"},\n        {\"@type\": \"MedicalEntity\", \"name\": \"Congenital syphilis: the infection crosses the placenta and can cause serious harm to an unborn child, but is almost entirely preventable by treatment during pregnancy, which is the reason antenatal screening exists. Timing of treatment in pregnancy affects how well the baby is protected\"},\n        {\"@type\": \"MedicalEntity\", \"name\": \"Increased risk of HIV acquisition through the breach in the skin barrier caused by the primary ulcer; HIV testing is routine alongside a syphilis diagnosis\"}\n      ],\n      \"possibleTreatment\": {\n        \"@type\": \"MedicalTherapy\",\n        \"name\": \"Penicillin G injection\",\n        \"description\": \"Dose and duration depend on the stage of infection, and involvement of the eyes, ears or nervous system requires a different and more intensive regimen. Follow-up nontreponemal blood tests are needed to confirm cure.\"\n      }\n    }\n  ]\n}\n<\/script>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Disclaimer:<\/strong> This content is written and reviewed by Dr. Soarawee Weerasopone, a board-certified urologist at Bangkok Hospital Headquarters. It is intended for educational purposes only and does not constitute medical advice. Blood test results must be interpreted by a doctor who knows your history \u2014 do not draw conclusions about your own results from this article alone. No medical advice, diagnosis or prescription is provided through personal messaging channels or social media. Always consult a qualified healthcare professional before starting any medical treatment. In an emergency, attend the nearest emergency department \u2014 in Thailand the emergency number is 1669.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u1780\u17b6\u179a\u1792\u17d2\u179c\u17be\u178f\u17c1\u179f\u17d2\u178f\u179f\u17d2\u179c\u17b6\u1799\u179c\u17b7\u1787\u17d2\u1787\u1798\u17b6\u1793\u1798\u17b7\u1793\u178f\u17c2\u1784\u178f\u17c2\u1798\u17b6\u1793\u1793\u17d0\u1799\u1790\u17b6\u1787\u17b6\u1780\u17b6\u179a\u1786\u17d2\u179b\u1784\u1798\u17c1\u179a\u17c4\u1782\u179f\u1780\u1798\u17d2\u1798\u1793\u17c4\u17c7\u1791\u17c1 \u2014 \u17a0\u17be\u1799\u1780\u17b6\u179a\u1792\u17d2\u179c\u17be\u178f\u17c1\u179f\u17d2\u178f\u1798\u17bd\u1799\u1780\u17d2\u1793\u17bb\u1784\u1785\u17c6\u178e\u17c4\u1798\u1780\u17b6\u179a\u1792\u17d2\u179c\u17be\u178f\u17c1\u179f\u17d2\u178f\u1791\u17b6\u17c6\u1784\u1796\u17b8\u179a\u1793\u17c5\u178f\u17c2\u1798\u17b6\u1793\u1797\u17b6\u1796\u179c\u17b7\u1787\u17d2\u1787\u1798\u17b6\u1793\u1796\u17c1\u1789\u1798\u17bd\u1799\u1787\u17b8\u179c\u17b7\u178f\u179a\u1794\u179f\u17cb\u17a2\u17d2\u1793\u1780 \u1791\u17c4\u17c7\u1794\u17b8\u1787\u17b6\u17a2\u17d2\u1793\u1780\u1794\u17b6\u1793\u1787\u17b6\u179f\u17c7\u179f\u17d2\u1794\u17be\u1799\u1780\u17cf\u178a\u17c4\u1799\u17d4 \u179c\u17c1\u1787\u17d2\u1787\u1794\u178e\u17d2\u178c\u17b7\u178f \u179f\u179a\u17c9\u17b6\u179c \u179c\u17b8\u179a\u17c9\u17b6\u1780\u17cb\u179f\u17bc\u1795\u17bb\u1793 \u1782\u17d2\u179a\u17bc\u1796\u17c1\u1791\u17d2\u1799\u17af\u1780\u1791\u17c1\u179f\u1781\u17b6\u1784\u1794\u17d2\u179a\u1796\u17d0\u1793\u17d2\u1792\u1791\u17b9\u1780\u1793\u17c4\u1798\u1793\u17c5\u1798\u1793\u17d2\u1791\u17b8\u179a\u1796\u17c1\u1791\u17d2\u1799\u1794\u17b6\u1784\u1780\u1780 \u1796\u1793\u17d2\u1799\u179b\u17cb\u1796\u17b8\u17a2\u17d2\u179c\u17b8\u178a\u17c2\u179b\u1780\u17b6\u179a\u1792\u17d2\u179c\u17be\u178f\u17c1\u179f\u17d2\u178f\u1793\u17b8\u1798\u17bd\u1799\u17d7\u179c\u17b6\u179f\u17cb\u179c\u17c2\u1784 \u1793\u17b7\u1784\u179a\u1794\u17c0\u1794\u17a2\u17b6\u1793\u179c\u17b6\u1787\u17b6\u1798\u17bd\u1799\u1782\u17d2\u1793\u17b6\u17d4.<\/p>","protected":false},"author":185281453,"featured_media":10101,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"advanced_seo_description":"Confused about syphilis blood tests? Dr. Soarawee explains the difference between nontreponemal screening tests (VDRL, RPR) and treponemal confirmation tests (TP-PA, FTA-ABS) and how to interpret your results.","jetpack_seo_html_title":"Syphilis Blood Tests Explained: VDRL, RPR, TP-PA & FTA-ABS | Dr. Soarawee Urology","jetpack_seo_noindex":false,"jetpack_seo_schema_type":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_wpcom_ai_launchpad_first_post":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"{title}\n\n{excerpt}\n\n{url}","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"_wpas_customize_per_network":false,"jetpack_post_was_ever_published":false},"categories":[1365],"tags":[1450,1445,1446,1448,1449,1447],"class_list":["post-2001","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sexual-transmitted-diseases","tag-rpr","tag-syphilis","tag-syphilis-test","tag-tpha","tag-tppa","tag-vdrl"],"jetpack_publicize_connections":[],"jetpack_likes_enabled":false,"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/pgZdrK-wh","jetpack_featured_media_url":"https:\/\/i0.wp.com\/drsoaraweeurology.com\/wp-content\/uploads\/2026\/04\/Syphilis-Blood-Tests.jpg?fit=1200%2C630&ssl=1","_links":{"self":[{"href":"https:\/\/drsoaraweeurology.com\/km\/wp-json\/wp\/v2\/posts\/2001","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/drsoaraweeurology.com\/km\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/drsoaraweeurology.com\/km\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/drsoaraweeurology.com\/km\/wp-json\/wp\/v2\/users\/185281453"}],"replies":[{"embeddable":true,"href":"https:\/\/drsoaraweeurology.com\/km\/wp-json\/wp\/v2\/comments?post=2001"}],"version-history":[{"count":30,"href":"https:\/\/drsoaraweeurology.com\/km\/wp-json\/wp\/v2\/posts\/2001\/revisions"}],"predecessor-version":[{"id":11815,"href":"https:\/\/drsoaraweeurology.com\/km\/wp-json\/wp\/v2\/posts\/2001\/revisions\/11815"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/drsoaraweeurology.com\/km\/wp-json\/wp\/v2\/media\/10101"}],"wp:attachment":[{"href":"https:\/\/drsoaraweeurology.com\/km\/wp-json\/wp\/v2\/media?parent=2001"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/drsoaraweeurology.com\/km\/wp-json\/wp\/v2\/categories?post=2001"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/drsoaraweeurology.com\/km\/wp-json\/wp\/v2\/tags?post=2001"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}