{"id":2123,"date":"2022-08-04T16:57:22","date_gmt":"2022-08-04T04:57:22","guid":{"rendered":"https:\/\/www.awanuilabs.co.nz\/south\/otagosouthland\/?page_id=2123"},"modified":"2022-08-04T16:57:23","modified_gmt":"2022-08-04T04:57:23","slug":"mumps","status":"publish","type":"page","link":"https:\/\/www.awanuilabs.co.nz\/south\/otagosouthland\/referrers\/microbiology-resources\/how-do-i-diagnose\/mumps\/","title":{"rendered":"Mumps"},"content":{"rendered":"\n<p><strong>Infection:<\/strong> Mumps<\/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 highly contagious vaccine-preventable viral illness.<\/li><li>Parotitis usually follows a few days of non-specific febrile symptoms. Mumps may however be only mildly symptomatic, including absence of fever.<\/li><li>Parotitis may initially be unilateral, but will progress to be bilateral in 90%. Unilateral involvement therefore does not exclude mumps, but alternative causes should be considered. Firm, erythematous swelling, significant tenderness, and purulent discharge from the parotid duct suggest a bacterial cause.<\/li><li>Can also involve the testicles (orchitis), ovaries (oophoritis) and the central nervous system.<\/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<ul><li>The mumps component of MMR offers around 80-90% protection after two doses, unlike the measles and rubella components, which offer close to 100%. A vaccination history therefore makes mumps less likely, but still possible.<\/li><li>A number of other common viruses can sometimes cause parotitis e.g. influenza.<\/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\">Who should I test?<\/summary><div class=\"ab-accordion-text\">\n<p>This <strong>varies<\/strong> depending on <strong>current epidemiology<\/strong>, with a lower threshold for testing if recent cases have been identified locally or nationally, or other possible exposure (e.g. overseas travel). If in doubt discuss with a <strong>clinical microbiologist<\/strong> or <strong>public health<\/strong>.<\/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\">Test of choice:<\/summary><div class=\"ab-accordion-text\">\n<p>Request <strong><a href=\"https:\/\/scg.aphg.co.nz\/#!\/WEL\/details\/MUP\">Mumps PCR<\/a><\/strong><\/p>\n\n\n\n<p><strong>Viral buccal swab <\/strong>for<strong> mumps PCR (RNA) <\/strong>in those with parotitis<\/p>\n\n\n\n<ul><li><strong>Massage<\/strong> the parotid gland for 30 seconds and then swab <strong>adjacent to the parotid duct <\/strong>to collect saliva directly from the gland.<\/li><li>Good <strong>sensitivity<\/strong> &#8211; a <strong>negative<\/strong> result on a well-collected sample within the <strong>first 3 days of parotitis<\/strong> makes the diagnosis <strong>unlikely<\/strong>. Beyond day 3 the sensitivity drops.<\/li><li>Excellent<strong> specificity &#8211; <\/strong>a <strong>positive<\/strong> result <strong>confirms<\/strong> the diagnosis, unless recent vaccination<\/li><\/ul>\n\n\n\n<p>If a patient presents with <strong>orchitis<\/strong>, <strong>oophoritis<\/strong>, or <strong>neurological<\/strong> <strong>complications<\/strong>, discuss testing with a microbiologist, as <strong>urine<\/strong> or <strong>CSF<\/strong> samples for PCR may be helpful.<\/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\">Tests to avoid\/specialist tests:<\/summary><div class=\"ab-accordion-text\">\n<p><strong><a href=\"https:\/\/scg.aphg.co.nz\/#!\/WEL\/details\/MUM\">Serology<\/a><\/strong> is not the recommended first line test. It is sometimes used in certain situations, e.g. people <strong>beyond the window of good PCR sensitivity<\/strong>. However results may be <strong>uninterpretable<\/strong>, especially if <strong>vaccinated. <\/strong>Discuss with a<strong> microbiologist<\/strong> prior to testing.<\/p>\n\n\n\n<ul><li><strong>IgM<\/strong> is used to indicate <strong>acute<\/strong> infection, and is more likely to be detectable <strong>from day 3 of parotitis<\/strong>. However, it has <strong>poor sensitivity<\/strong>, particularly in <strong>vaccinated<\/strong> individuals, so a negative result <strong>cannot exclude mumps<\/strong>.<\/li><li><strong>IgM<\/strong> also has <strong>poor specificity<\/strong> and <strong>false positives<\/strong> can be seen with other illnesses.<\/li><li><strong>IgG<\/strong> indicates <strong>vaccination<\/strong> or <strong>infection<\/strong> with mumps <strong>at some point in time<\/strong>, so a positive result <strong>does not confirm current acute infection<\/strong>. A <strong>negative<\/strong> <strong>convalescent<\/strong> sample can however <strong>exclude mumps<\/strong> as a cause of illness.<\/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<ul><li>Suspicion of mumps should be <strong>notified immediately<\/strong> to public health<\/li><li>People with suspected mumps should <strong>avoid waiting rooms<\/strong>, <strong>laboratory collection centres<\/strong>, or other areas where they could <strong>expose others<\/strong> to possible infection.<\/li><\/ul>\n<\/div><\/details><\/div>\n","protected":false},"excerpt":{"rendered":"Infection: Mumps","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>Mumps &#8212; 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