{"id":4394,"date":"2021-09-15T14:07:30","date_gmt":"2021-09-15T02:07:30","guid":{"rendered":"https:\/\/www.awanuilabs.co.nz\/central\/wellington\/?page_id=4394"},"modified":"2025-05-05T14:02:50","modified_gmt":"2025-05-05T02:02:50","slug":"chlamydia","status":"publish","type":"page","link":"https:\/\/www.awanuilabs.co.nz\/central\/wellington\/for-referrers\/microbiology\/how-do-i-diagnose\/chlamydia\/","title":{"rendered":"Chlamydia"},"content":{"rendered":"\n<p><strong>Infection:<\/strong> &nbsp;<em>Chlamydia<\/em> <em>trachomatis <\/em>infection; Chlamydia; CT<\/p>\n\n\n\n<div class=\"wp-block-atomic-blocks-ab-accordion ab-block-accordion\"><details><summary class=\"ab-accordion-title\">Brief description:<\/summary><div class=\"ab-accordion-text\">\n<ul>\n<li>A bacteria that causes sexually transmitted infections.<\/li>\n\n\n\n<li>The commonest bacterial STI seen in the NZ population, particularly in those aged &lt;30 years.<\/li>\n\n\n\n<li>Most commonly asymptomatic. If symptomatic, typically less severe than gonorrhoea.<\/li>\n\n\n\n<li>Can cause vaginal\/urethral discharge, dysuria, lower abdominal pain, abnormal vaginal bleeding, testicular pain\/swelling, or anal pain\/discharge.<\/li>\n<\/ul>\n<\/div><\/details><\/div>\n\n\n\n<div class=\"wp-block-atomic-blocks-ab-accordion ab-block-accordion\"><details><summary class=\"ab-accordion-title\">Did you know?<\/summary><div class=\"ab-accordion-text\">\n<p>There are multiple different types (serovars) of <em>Chlamydia<\/em> <em>trachomatis<\/em>. Serovars A-C cause the eye infection trachoma and the L serovars cause lymphogranuloma venereum. Serovars D-K cause the typical STI discussed on this page.<\/p>\n<\/div><\/details><\/div>\n\n\n\n<div class=\"wp-block-atomic-blocks-ab-accordion ab-block-accordion\"><details><summary class=\"ab-accordion-title\">Who do I test?<\/summary><div class=\"ab-accordion-text\">\n<ul>\n<li>Test sexually active people aged under 30 years, and those with risk factors, including if asymptomatic.<\/li>\n\n\n\n<li>Test sexually active people with signs or symptoms, and known contacts.<\/li>\n\n\n\n<li>It can take <strong>up to 2 weeks<\/strong> to test positive if infection occurs relating to <strong>specific sexual event<\/strong>.<\/li>\n\n\n\n<li>Positive results in people with a very <strong>low pre-test probability<\/strong> have a higher change of being <strong>false<\/strong> <strong>positives<\/strong>. Caution is advised when testing in very low pre-test probability groups, <strong>especially if a false positive result could have significant negative consequences<\/strong> e.g. children, older people in stable relationships. Many labs will not accept tests in children without prior discussion with an expert.<\/li>\n<\/ul>\n<\/div><\/details><\/div>\n\n\n\n<div class=\"wp-block-atomic-blocks-ab-accordion ab-block-accordion\"><details><summary class=\"ab-accordion-title\">Test of choice:<\/summary><div class=\"ab-accordion-text\">\n<p>Request<strong> <a href=\"https:\/\/scg.labapps.nz\/#\/WEL\/details\/26928\" target=\"_blank\" rel=\"noreferrer noopener\">Chlamydia NAAT<\/a><\/strong><\/p>\n\n\n\n<p><strong>NAAT\/PCR <\/strong>on<strong> vaginal swab <\/strong>(self- or clinician-collected) for women, <strong>first void urine<\/strong> (&gt;1 hour after last void) for men. <strong>Anorectal<\/strong> <strong>swabs<\/strong> can also be taken in women based on sexual history, and is indicated in <strong>men who have sex with men<\/strong>, in addition to <strong>pharyngeal<\/strong> swabs.<\/p>\n\n\n\n<ul>\n<li>A <strong>specific kit<\/strong> is usually required for NAAT testing e.g. the<strong> Aptima <\/strong>swabs\/urine kit.<\/li>\n\n\n\n<li><strong>Gonorrhoea<\/strong> is tested in parallel from the <strong>same sample<\/strong>, and other STI testing e.g. Trichomonas can be <strong>shared<\/strong> also.<\/li>\n\n\n\n<li>Excellent<strong> sensitivity &#8211; <\/strong>a<strong> negative <\/strong>test on a well-collected sample makes the diagnosis <strong>very unlikely<\/strong><\/li>\n\n\n\n<li>Excellent<strong> specificity&nbsp;&#8211; <\/strong>a<strong> positive <\/strong>test in an at risk person makes the diagnosis<strong> highly likely<\/strong><\/li>\n\n\n\n<li><strong>First void urine <\/strong>can also be used in women, but is second line due to <strong>lower sensitivity<\/strong>. Urethral swab can also be used for men.<\/li>\n<\/ul>\n<\/div><\/details><\/div>\n\n\n\n<div class=\"wp-block-atomic-blocks-ab-accordion ab-block-accordion\"><details><summary class=\"ab-accordion-title\">Other considerations:<\/summary><div class=\"ab-accordion-text\">\n<ul>\n<li>All sexual contacts from the <strong>prior 3 months<\/strong> should be notified.<\/li>\n\n\n\n<li><strong>Reinfection <\/strong>is common. Offer repeat sexual health check at 3 months.<\/li>\n\n\n\n<li><strong>Test of cure <\/strong>is<strong> not required <\/strong>if symptoms resolve, unless pregnant or rectal infection<strong>.<\/strong><\/li>\n\n\n\n<li>Don\u2019t retest <strong>within 4 weeks<\/strong> of treatment (including for test of cure), as the test <strong>may remain positive<\/strong> due to residual dead organisms.<\/li>\n<\/ul>\n<\/div><\/details><\/div>\n","protected":false},"excerpt":{"rendered":"Infection: &nbsp;Chlamydia trachomatis infection; Chlamydia; CT","protected":false},"author":18,"featured_media":0,"parent":4222,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"page-left-sidebar.php","meta":{"footnotes":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Chlamydia &#8211; Awanui Labs - Wellington<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.awanuilabs.co.nz\/central\/wellington\/for-referrers\/microbiology\/how-do-i-diagnose\/chlamydia\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Chlamydia &#8211; 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