{"id":2149,"date":"2022-08-04T17:07:21","date_gmt":"2022-08-04T05:07:21","guid":{"rendered":"https:\/\/www.awanuilabs.co.nz\/south\/otagosouthland\/?page_id=2149"},"modified":"2022-08-04T17:07:22","modified_gmt":"2022-08-04T05:07:22","slug":"toxoplasmosis","status":"publish","type":"page","link":"https:\/\/www.awanuilabs.co.nz\/south\/otagosouthland\/referrers\/microbiology-resources\/how-do-i-diagnose\/toxoplasmosis\/","title":{"rendered":"Toxoplasmosis"},"content":{"rendered":"\n<p><strong>Infection:<\/strong> Toxoplasmosis; <em>Toxoplasma gondii<\/em> infection<\/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><li>A type of protozoa that causes a systemic infection, which is most commonly asymptomatic.<\/li><li>If symptoms occur, the commonest pattern is a short-lived systemic illness followed by cervical lymphadenopathy, which is bilateral and non-tender, and can persist for weeks.<\/li><li>After primary (acute) infection, the organism persists in the body life-long in a dormant state. May reactivate if a person subsequently becomes severely immunocompromised.<\/li><li>Can cause congenital infection if first acquired during pregnancy. Seek specialist advice.<\/li><\/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>Is acquired either by ingestion of eggs, which are present in the faeces of infected cats, or by ingesting undercooked meat from infected animals e.g. rare beef.<\/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 should I test?<\/summary><div class=\"ab-accordion-text\">\n<ul><li>Consider testing in those with <strong>multiple enlarged lymph nodes<\/strong>, or nodes that are <strong>not reducing in size at 2 weeks<\/strong>. Keep in mind other <strong>more serious causes<\/strong> of lymphadenopathy.<\/li><li>Testing in pregnant women with cat exposure but <strong>no symptoms<\/strong> is <strong>not<\/strong> <strong>recommended<\/strong>.<\/li><li>Test if abnormalities consistent with <strong>congenital <\/strong>infection seen on <strong>antenatal USS<\/strong>.<\/li><\/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.aphg.co.nz\/#!\/WEL\/details\/TOX\">Toxoplasma serology<\/a><\/strong><\/p>\n\n\n\n<p><strong>Toxoplasma IgM <\/strong>is a marker of<strong> primary (acute) infection <\/strong>and usually appears<strong> within 1 week <\/strong>of symptoms. May persist for months or years.<\/p>\n\n\n\n<ul><li>Good<strong> sensitivity &#8211;  <\/strong>a <strong>negative <\/strong>resultmakes the diagnosis<strong> very unlikely <\/strong>if &gt;1 week of symptoms.<\/li><li>Moderate <strong>specificity<\/strong> &#8211; a <strong>positive<\/strong> result in someone with compatible symptoms is <strong>supportive<\/strong>, but <strong>cannot confirm<\/strong> toxoplasmosis.<\/li><\/ul>\n\n\n\n<p><strong>Toxoplasma IgG<\/strong> indicates infection <strong>at some point in time<\/strong> (can be acute <strong>or<\/strong> past infection). Usually appears <strong>within 2 weeks<\/strong> of symptoms and persists <strong>life-long<\/strong>.<\/p>\n\n\n\n<ul><li>Excellent<strong> sensitivity &#8211; <\/strong>a <strong>negative<\/strong> result <strong>excludes<\/strong> toxoplasma infection, unless within 2 weeks of infection<\/li><li>Excellent <strong>specificity<\/strong> &#8211; a <strong>positive<\/strong> result <strong>confirms<\/strong> infection at some stage<\/li><li>Conversion from <strong>negative<\/strong> to <strong>positive<\/strong> <strong>IgG<\/strong> confirms acute toxoplasma infection during the intervening period.<\/li><\/ul>\n\n\n\n<p><strong>IgG avidity testing<\/strong> can also be performed (discuss with microbiologist):<\/p>\n\n\n\n<ul><li><strong>High avidity<\/strong> suggests infection <strong>&gt;4 months prior<\/strong><\/li><li><strong>Low avidity<\/strong> is less specific and can mean <strong>recent or old infection<\/strong><\/li><\/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\">Tests to avoid\/specialist tests:<\/summary><div class=\"ab-accordion-text\">\n<ul><li><strong><a href=\"https:\/\/scg.aphg.co.nz\/#!\/WEL\/details\/TOD\">Toxoplasma PCR<\/a> <\/strong>is reserved for specialist use, e.g.:<ul><li>To diagnose <strong>reactivation<\/strong> infection in severely <strong>immunocompromised<\/strong> people.<\/li><\/ul><ul><li>To confirm <strong>congenital infection<\/strong> via <strong>amniocentesis <\/strong>or<strong> placental testing<\/strong>.<\/li><\/ul><\/li><\/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<p>In the setting of possible <strong>congenital toxoplasmosis<\/strong> and a mother with a <strong>positive IgG<\/strong>, testing of the <strong>booking blood sample<\/strong> can sometimes be useful \u2013 discuss with a microbiologist.<\/p>\n<\/div><\/details><\/div>\n","protected":false},"excerpt":{"rendered":"Infection: Toxoplasmosis; Toxoplasma gondii infection","protected":false},"author":18,"featured_media":0,"parent":2060,"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>Toxoplasmosis &#8212; Awanui Labs \u2013 Otago, Southland<\/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\/south\/otagosouthland\/referrers\/microbiology-resources\/how-do-i-diagnose\/toxoplasmosis\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Toxoplasmosis &#8212; Awanui Labs \u2013 Otago, Southland\" \/>\n<meta property=\"og:description\" content=\"Infection: Toxoplasmosis; Toxoplasma gondii infection\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.awanuilabs.co.nz\/south\/otagosouthland\/referrers\/microbiology-resources\/how-do-i-diagnose\/toxoplasmosis\/\" \/>\n<meta property=\"og:site_name\" content=\"Awanui Labs \u2013 Otago, Southland\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/SouthernCommunityLaboratories\" \/>\n<meta property=\"article:modified_time\" content=\"2022-08-04T05:07:22+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/fl-healthscope-media.s3.amazonaws.com\/lab-sites\/uploads\/sites\/5\/2023\/07\/Awanui-Labs-Lab-Technician-min.jpeg\" \/>\n\t<meta property=\"og:image:width\" content=\"2000\" \/>\n\t<meta property=\"og:image:height\" content=\"917\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.awanuilabs.co.nz\/south\/otagosouthland\/referrers\/microbiology-resources\/how-do-i-diagnose\/toxoplasmosis\/\",\"url\":\"https:\/\/www.awanuilabs.co.nz\/south\/otagosouthland\/referrers\/microbiology-resources\/how-do-i-diagnose\/toxoplasmosis\/\",\"name\":\"Toxoplasmosis &#8212; 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