{"id":4421,"date":"2021-09-15T15:01:10","date_gmt":"2021-09-15T03:01:10","guid":{"rendered":"https:\/\/www.awanuilabs.co.nz\/central\/wellington\/?page_id=4421"},"modified":"2025-05-05T14:11:40","modified_gmt":"2025-05-05T02:11:40","slug":"hepatitis-e-virus-hev","status":"publish","type":"page","link":"https:\/\/www.awanuilabs.co.nz\/central\/wellington\/for-referrers\/microbiology\/how-do-i-diagnose\/hepatitis-e-virus-hev\/","title":{"rendered":"Hepatitis E virus (HEV)"},"content":{"rendered":"\n<p><strong>Infection:<\/strong>  Hepatitis E virus (HEV) 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 class=\"wp-block-list\">\n<li>Virus that causes an acute hepatitis that self resolves<\/li>\n\n\n\n<li>Majority of infections are asymptomatic.<\/li>\n\n\n\n<li>Previously thought to only be acquired overseas, however 8-10% of NZ blood donors have serological evidence of infection.<\/li>\n\n\n\n<li>Can cause chronic infection in people with significant immunosuppression (e.g. liver transplantation)<\/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<ul class=\"wp-block-list\">\n<li>Hepatitis E is transmitted by the faecal-oral route.<\/li>\n\n\n\n<li>Genotypes 1 and 2 cause infection in humans only and are endemic in Asia and Africa<\/li>\n\n\n\n<li>Genotypes 3 and 4 are zoonotic and are present in Europe, USA and Asia. Infection is usually transmitted by consumption of undercooked meat such as pork. 90% of NZ pigs show serological evidence of infection.<\/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\">Who should I test?<\/summary><div class=\"ab-accordion-text\">\n<p>Testing generally reserved for patients with <strong>acute hepatitis<\/strong> (ALT &gt; 500) with history of <strong>travel<\/strong> to endemic regions or with <strong>no alternative diagnosis.<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Mimics<\/strong> to consider in patients with <strong>hepatitis<\/strong>:&nbsp;hepatitis A, B and C, HIV, syphilis<\/li>\n\n\n\n<li>In an outbreak setting a lower threshold for testing is usually warranted<\/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\/27148\" target=\"_blank\" rel=\"noreferrer noopener\">Hep E serology<\/a><\/strong><\/p>\n\n\n\n<p><strong>Hepatitis E virus serology<\/strong> \u2013 IgM and IgG<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Anti-HEV IgM<\/strong> is usually detectable 2-3 weeks after exposure and is usually negative after 3-6 months. Therefore detection is consistent with <strong>acute infection<\/strong>.<\/li>\n\n\n\n<li><strong>Anti-HEV IgG<\/strong> is detectable early in the illness and is long lasting. Detection is usually consistent with <strong>prior infection<\/strong> if the IgM is negative.<\/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\">Tests to avoid\/specialist tests:<\/summary><div class=\"ab-accordion-text\">\n<p><strong>Hepatitis E virus PCR<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Used to diagnose chronic HEV infection in immunosuppressed patients<\/li>\n<\/ul>\n<\/div><\/details><\/div>\n","protected":false},"excerpt":{"rendered":"Infection: Hepatitis E virus (HEV) infection","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":""},"class_list":["post-4421","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Hepatitis E virus (HEV) &#8211; 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