{"id":141808,"date":"2024-09-21T08:07:51","date_gmt":"2024-09-21T08:07:51","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=141808"},"modified":"2024-09-21T08:07:53","modified_gmt":"2024-09-21T08:07:53","slug":"which-nursing-assessment-indicates-a-positive-reading-of-a-tuberculin-tb-skin-test","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2024\/09\/21\/which-nursing-assessment-indicates-a-positive-reading-of-a-tuberculin-tb-skin-test\/","title":{"rendered":"Which nursing assessment indicates a positive reading of a tuberculin (TB) skin test"},"content":{"rendered":"\n<p>Which nursing assessment indicates a positive reading of a tuberculin (TB) skin test?<\/p>\n\n\n\n<p>A.<br>1 day after injection with a 10-mm area of redness and swelling<\/p>\n\n\n\n<p>B.<br>2 days after injection with a 5-mm area of redness and swelling<\/p>\n\n\n\n<p>C.<br>4 days after injection with a 3-mm area of redness and swelling<\/p>\n\n\n\n<p>D.<br>5 days after injection with a 2-mm area of redness and swelling<\/p>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-6-color\"><strong>The correct answer and Explanation is :<\/strong><\/mark><\/p>\n\n\n\n<p>The correct answer is <strong>A. 1 day after injection with a 10-mm area of redness and swelling.<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation<\/h3>\n\n\n\n<p>A tuberculin skin test (TST), commonly known as the Mantoux test, is used to determine if a person has been infected with the bacterium that causes tuberculosis (TB). The test involves injecting a small amount of purified protein derivative (PPD) intradermally into the forearm. After 48 to 72 hours, the site of injection is examined for induration (swelling) and erythema (redness).<\/p>\n\n\n\n<p>A positive reaction indicates that the immune system has been sensitized to the TB antigens, which can occur due to either a current infection or a previous exposure to the bacteria, whether from active TB or from the Bacillus Calmette-Gu\u00e9rin (BCG) vaccine.<\/p>\n\n\n\n<p>The criteria for a positive TST reading depend on the size of the induration and the individual&#8217;s risk factors. A measurement of 10 mm or greater is generally considered positive for individuals at average risk for TB. However, for high-risk populations (like those with weakened immune systems, recent contacts with TB patients, or certain medical conditions), a positive result can be determined with smaller induration sizes.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Option A:<\/strong> A 10-mm area of induration 1 day after the injection is a clear positive result, as it meets the threshold for those who are at average risk.<\/li>\n\n\n\n<li><strong>Option B:<\/strong> A 5-mm induration after 2 days may be significant for certain high-risk groups but is not generally considered positive for the average population.<\/li>\n\n\n\n<li><strong>Option C:<\/strong> A 3-mm area after 4 days does not meet the minimum threshold for a positive result.<\/li>\n\n\n\n<li><strong>Option D:<\/strong> A 2-mm area after 5 days is also below the positive threshold.<\/li>\n<\/ul>\n\n\n\n<p>In summary, a positive TST reading of 10 mm within the appropriate time frame signifies a significant reaction and warrants further evaluation for TB infection.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Which nursing assessment indicates a positive reading of a tuberculin (TB) skin test? A.1 day after injection with a 10-mm area of redness and swelling B.2 days after injection with a 5-mm area of redness and swelling C.4 days after injection with a 3-mm area of redness and swelling D.5 days after injection with a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-141808","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/141808","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=141808"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/141808\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=141808"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=141808"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=141808"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}