publicdata/nih-gov
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions
nih-gov/www.nlm.nih.gov/pubs/techbull/nd20/nd20_medline_data_changes_2021.html
Scott Williams 7bcb500d37 Initial commit.
2025-02-26 13:17:41 -05:00

518 lines
30 KiB
HTML
Raw Blame History

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en">
<head>
<meta http-equiv="X-UA-Compatible" content="IE=8;" />
<meta name="twitter:card" content="summary_large_image">
<meta name="twitter:site" content="@NLM_NIH">
<meta name="twitter:title" content="MEDLINE Data Changes&mdash;2021. NLM Technical Bulletin. 2020 Nov&#8211;Dec">
<meta name="twitter:description" content=" The NLM Technical Bulletin is your source to stay informed about NLM products and services.">
<meta name="twitter:image" content="https://www.nlm.nih.gov/pubs/techbull/images/nlm_tech_bulletin_graphic_twitter.jpg">
<meta property="og:url" content="https://www.nlm.nih.gov/pubs/techbull/tb.html" />
<meta property="og:type" content="article" />
<meta property="og:title" content="MEDLINE Data Changes&mdash;2021. NLM Technical Bulletin. 2020 Nov&#8211;Dec" />
<meta property="og:description" content="The NLM Technical Bulletin is your source to stay informed about NLM products and services." />
<meta property="og:image" content="https://www.nlm.nih.gov/pubs/techbull/images/nlm_tech_bulletin_graphic_facebook.jpg" />
<link type="text/css" href="/pubs/techbull/styles/reset.css" rel="stylesheet" />
<link type="text/css" href="/pubs/techbull/styles/technicalBulletin.css" rel="stylesheet" />
<!--Call jQuery-->
<script src="//assets.nlm.nih.gov/jquery/jquery-latest.min.js"></script>
<script src="//assets.nlm.nih.gov/jquery/jquery-migrate-latest.min.js"></script>
<script src="/pubs/techbull/scripts/techbull.js" type="text/javascript" language="javascript"></script>
<!--[if lte IE 8]>
<script type="text/javascript" src="/scripts/PIE.js"></script>
<![endif]-->
<link type="text/css" href="/pubs/techbull/styles/print.css" rel="stylesheet" media="print"/>
<title>MEDLINE Data Changes&mdash;2021. NLM Technical Bulletin. 2020 Nov&#8211;Dec</title>
<link rel="schema.DC" href="http://purl.org/dc/elements/1.1/" title="The Dublin Core metadata Element Set" />
<meta name="DC.Title" content="MEDLINE Data Changes&mdash;2021" />
<meta name="DC.Publisher" content="U.S. National Library of Medicine" />
<meta name="DC.Date.Issued" content="2020-12-04" />
<meta name="DC.Date.Modified" content="2024-03-12" />
<meta name="NLMDC.Date.LastReviewed" content="2024-03-12" />
<meta name="NLM.Contact.Email" content="nlmtechbull@mail.nlm.nih.gov" />
<meta name="DC.Type" content="Newsletters" />
<meta name="NLM.Permanence.Level" content="Permanent: Stable Content" />
<meta name="DC.Rights" content="Public Domain" />
<meta name="DC.Language" content="eng" />
<meta name="DC.Subject.Keyword" content="Update" />
<meta name="DC.Subject.Keyword" content="Medical Subject Headings" />
<meta name="DC.Subject.Keyword" content="Supplementary Concept Records" />
<meta name="DC.Subject.Keyword" content="MEDLINE" />
<meta name="DC.Subject.Keyword" content="National Center for Biotechnology Information" />
<meta name="DC.Subject.Keyword" content="Entry Combination" />
<meta name="DC.Subject.Keyword" content="Subheading" />
<meta name="DC.Subject.Keyword" content="MeSH Browser" />
<meta name="DC.Subject.Keyword" content="PubMed" />
<meta name="DC.Subject.Keyword" content="Animal" />
<meta name="DC.Subject.Keyword" content="Year-End Processing" />
<meta name="DC.Subject.Keyword" content="MeSH Terms" />
<meta name="DC.Subject.Keyword" content="Indexing" />
<meta name="DC.Subject.Keyword" content="Document Type Definition" />
<meta name="DC.Subject.Keyword" content="Automatic Term Mapping" />
<meta name="DC.Subject.Keyword" content="MeSH Database" />
<meta name="DC.Subject.Keyword" content="Medical Literature Analysis and Retrieval System" />
<meta name="DC.Subject.Keyword" content="Metadata" />
<meta name="DC.Subject.Keyword" content="Registry Number/EC Number" />
<!-- Google Tag Manager -->
<script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start': new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='//www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-MT6MLL');</script>
<!-- End Google Tag Manager -->
</head>
<body>
<!-- Google Tag Manager -->
<noscript><iframe src="//www.googletagmanager.com/ns.html?id=GTM-MT6MLL" height="0" width="0" style="display:none;visibility:hidden" title="googletagmanager"></iframe></noscript>
<!-- End Google Tag Manager -->
<div class="skipnavigation"><a title="Skip the navigation on this page" href="#skipnav" class="skipnavigation">Skip Navigation Bar</a></div>
<div>
<div class="header">
<img src="/pubs/techbull/images/tb_logo_113.jpg" alt="National Library of Medicine Technical Bulletin" title="National Library of Medicine Technical Bulletin" /><img src="/pubs/techbull/images/nlm_masthead_113.jpg" alt="National Library of Medicine Technical Bulletin" title="National Library of Medicine Technical Bulletin" usemap="#nlm_masthead_113" />
</div>
<div class="search_box">
<form method="get" action="//vsearch.nlm.nih.gov/vivisimo/cgi-bin/query-meta" target="_self" name="searchForm" class="searchForm">
<label class="displaynone" for="search">Search</label>
<input name="query" id="search" type="text" class="search-input inactive" size="50" onfocus="this.value=''" value="Search here for NLM Technical Bulletin articles" aria-label="Search NLM Technical Bulletin">
<input type="hidden" name="v:project" value="technical-bulletin">
</form>
</div>
</div>
<div id="nav">
<!--Open drop-->
<ul class="topnav">
<li class="currentissue"><a href="//www.nlm.nih.gov/pubs/techbull/current_issue.html">Current Issue</a> <img class="separator" src="/pubs/techbull/images/whitelinetransparentbackground.gif " alt=""/></li>
<li class="archive"><a href="//www.nlm.nih.gov/pubs/techbull/back_issues.html">Previous Issues</a> <img class="separator" src="/pubs/techbull/images/whitelinetransparentbackground.gif " alt=""/></li>
<li class="about"><a href="//www.nlm.nih.gov/pubs/techbull/about.html">About</a> <img class="separator" src="/pubs/techbull/images/whitelinetransparentbackground.gif " alt=""/></li>
<li class="staycurrent"><a href="//www.nlm.nih.gov/pubs/techbull/stay_current.html">Stay Current <img class="emaillogo" src="/pubs/techbull/images/email_20px.gif" alt="E-Mail Sign Up" style="margin-top: -4px;"/> <img class="rsslogo" src="/pubs/techbull/images/rss_20px.gif" alt="RSS Feed" style="margin-top: -4px;"/></a></li>
</ul>
<!--Close drop-->
</div>
<div class="body">
<a id="skipnav" name="skipnav"></a>
<div class="syndicate">
<p class="tableOfContents"><strong>Table of Contents: <a href="/pubs/techbull/nd20/nd20_issue_cover.html">2020 NOVEMBER&#8211;DECEMBER No. 437</a></strong></p>
<p class="prevnext"><span class="buttons">
<span class="previous"><a href="nd20_mesh_covid_terms.html">Previous</a></span> <span class="next"><a href="nd20_cataloging_news_2021.html">Next</a></span>
</span></p>
<hr class="hr1" />
<h1 class="articleH1">MEDLINE Data Changes&mdash;2021</h1>
<p class="tbyearmonth">Tybaert S. MEDLINE Data Changes&mdash;2021. NLM Tech Bull. 2020 Nov-Dec;(437):e3a.</p>
<div class="articleactions">2020 December 04 <span class="status">[posted]</span>
</div>
<div class="articleParagraph">
<table style="float: right; width: 250px; margin-right: 2px;" id="sidebar">
<tr>
<td>
<div style="border: solid 0 #888888; border-width:1px; padding:0.5ex">
<dl>
<dt>
<!--&#8226; <a href="https://www.nlm.nih.gov/pubs/techbull/nd19/nd19_mesh.html">What's New for 2020 MeSH</a><br /><br />
&#8226; <a href="https://www.nlm.nih.gov/pubs/techbull/nd19/brief/nd19_new_system.html">Newly Maintained MEDLINE for 2020 MeSH Now Available in PubMed</a><br /> <br />
&#8226; <a href="https://www.nlm.nih.gov/pubs/techbull/nd19/nd19_cataloging_new_2020.html">Cataloging and Metadata News&mdash;2020</a><br /><br />
-->
&#8226; <a href="https://www.nlm.nih.gov/pubs/techbull/ja20/brief/ja20_mesh_headings.html">2021 MeSH Headings Available in the MeSH Browser</a><br /><br />
&#8226; <a href="https://www.nlm.nih.gov/pubs/techbull/so20/so20_yep_overview.html">MEDLINE/PubMed Year-End Processing Activities for 2021</a><br /><br />
<img src="/pubs/techbull/mj07/graphics/blutri.gif" alt="dot" height="10" width="10"/>MEDLINE Data Changes&mdash;2021<br /><br />
&#8226; <a href="https://www.nlm.nih.gov/pubs/techbull/nd20/brief/nd20_mesh_2021_classes.html">2021 MeSH Classes: Highlights, Changes and PubMed Searching</a> <br /> <br />
<dd>&nbsp;</dd>
</dl>
</div>
</td></tr>
</table>
<p>This article collects the notable data changes made to MEDLINE during the National Library of Medicine (NLM) annual maintenance known as Year-End Processing (YEP) for 2021:</p>
<ul>
<li><a href="#updated_mesh">MeSH Vocabulary Updated for 2021</a></li>
<li><a href="#updated_citations">Updated MeSH in MEDLINE Citations</a></li>
<li><a href="#mesh_changes">Changes to MeSH Headings</a></li>
<li><a href="#new_mesh">New MeSH Headings and Concepts</a></li>
<li><a href="#tree_changes">MeSH Tree Changes</a></li>
<li><a href="#covid_terminology">COVID-19 Terminology</a></li>
<li><a href="#special_projects">Special MeSH Projects</a></li>
<li><a href="#confuse">Do Not Confuse</a></li>
<li><a href="#entry_combination">Entry Combination Revisions</a></li>
<li><a href="#distribution">Data Distribution Notes</a></li>
<li><a href="#ncbi_taxonomy">NCBI Taxonomy Identifiers</a></li>
</ul>
<p></p>
<p></p>
<a name="updated_mesh"></a>
<h1>MeSH Vocabulary Updated for 2021</h1>
<p>The <a href="https://meshb.nlm.nih.gov/#/fieldSearch">MeSH Browser</a> currently points to the <strong>2020</strong> MeSH vocabulary with a link to the <strong>2021</strong> MeSH vocabulary. On December 3<sup>rd</sup>, the default will switch to 2021 and the alternate link will be routed to 2020 MeSH. Searchers should consult the Browser to find MeSH headings of interest and their relationships to other headings. The Browser contains MeSH heading records that may include Scope Notes, Annotations, Entry Terms, History Notes, Allowable Qualifiers (Subheadings), Previous Indexing, and other information. It also includes Subheading records and Supplementary Concept Records (SCRs) for substances, diseases, and organisms that are not MeSH headings.</p>
<p>You can <a href="https://www.nlm.nih.gov/databases/download/mesh.html">download</a> 2021 MeSH from links on the <a href="https://www.nlm.nih.gov/databases/download/data_distrib_main.html">NLM Data Distribution page</a> for MeSH Data.</p>
<p>For highlights about 2021 MeSH, see <em>What's New for 2021 MeSH (forthcoming)</em>.</p>
<p>The PubMed MeSH database and translation tables will be updated to reflect 2021 MeSH by the middle of December when YEP activities are complete and the newly maintained MEDLINE data are available in PubMed.</p>
<p></p>
<a name="updated_citations"></a>
<h1>Updated MeSH in MEDLINE Citations</h1>
<p>MEDLINE citations with updated MeSH are anticipated to be in PubMed by mid-December 2020. See <a href="https://www.nlm.nih.gov/bsd/disted/pubmedtutorial/040_040.html">"Modifying a Saved Search Strategy"</a> for details on revising <a href="https://www.ncbi.nlm.nih.gov/account/">My NCBI</a> saved searches.</p>
<p></p>
<a name="mesh_changes"></a>
<h1>Changes to MeSH Headings</h1>
<p>For 2021, fourteen MeSH headings were either changed or deleted and replaced with more up-to-date terminology. During YEP, NLM updates these MeSH headings on MEDLINE citations.</p>
<p></p>
<table style="width: 90%">
<tbody>
<tr style="height: 18px;">
<td style="width: 50%; height: 18px;"><strong>Replaced Term</strong></td>
<td style="width: 50%; height: 18px;"><strong>Replaced-By Term</strong></td>
</tr>
<tr style="height: 18px;">
<td style="width: 50%; height: 18px;">Alaska Natives</td>
<td style="width: 50%; height: 18px;"><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000072957">Alaskan Natives</a></td>
</tr>
<tr style="height: 18px;">
<td style="width: 50%; height: 18px;">Aldehyde Dehydrogenase 1</td>
<td style="width: 50%; height: 18px;"><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000080924">Aldehyde Dehydrogenase 1 Family</a></td>
</tr>
<tr style="height: 18px;">
<td style="width: 50%; height: 18px;">Bonding, Human-Pet</td>
<td style="width: 50%; height: 18px;"><a href="https://meshb.nlm.nih.gov/record/ui?ui=D001841">Human-Animal Bond</a></td>
</tr>
<tr style="height: 18px;">
<td style="width: 50%; height: 18px;">Clostridium difficile</td>
<td style="width: 50%; height: 18px;"><a href="https://meshb.nlm.nih.gov/record/ui?ui=D016360">Clostridioides difficile</a></td>
</tr>
<tr style="height: 18px;">
<td style="width: 50%; height: 18px;">Debaromyces</td>
<td style="width: 50%; height: 18px;"><a href="https://meshb.nlm.nih.gov/record/ui?ui=D055165">Debaryomyces</a></td>
</tr>
<tr style="height: 18px;">
<td style="width: 50%; height: 18px;">Infantile Apparent Life-Threatening Event</td>
<td style="width: 50%; height: 18px;"><a href="https://meshb.nlm.nih.gov/record/ui?ui=D057768">Brief, Resolved, Unexplained Event</a></td>
</tr>
<tr style="height: 18px;">
<td style="width: 50%; height: 18px;">Mentally Disabled Persons</td>
<td style="width: 50%; height: 18px;"><a href="https://meshb.nlm.nih.gov/record/ui?ui=D019989">Persons with Mental Disabilities</a></td>
</tr>
<tr style="height: 18px;">
<td style="width: 50%; height: 18px;">Pectobacterium chrysanthemi</td>
<td style="width: 50%; height: 18px;"><a href="https://meshb.nlm.nih.gov/record/ui?ui=D016974">Dickeya chrysanthemi</a></td>
</tr>
<tr style="height: 18px;">
<td style="width: 50%; height: 18px;">Pimenta</td>
<td style="width: 50%; height: 18px;"><a href="https://meshb.nlm.nih.gov/record/ui?ui=D027841">Genus Pimenta</a></td>
</tr>
<tr>
<td style="width: 50%;">Pyruvate Dehydrogenase (Acetyl-Transferring) Kinase</td>
<td style="width: 50%;"><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000081382">Pyruvate Dehydrogenase Acetyl-Transferring Kinase</a></td>
</tr>
<tr>
<td style="width: 50%;">Respiratory Distress Syndrome, Adult</td>
<td style="width: 50%;"><a href="https://meshb.nlm.nih.gov/record/ui?ui=D012128">Respiratory Distress Syndrome</a></td>
</tr>
<tr>
<td style="width: 50%;">RNA Replicase</td>
<td style="width: 50%;"><a href="https://meshb.nlm.nih.gov/record/ui?ui=D012324">RNA-Dependent RNA Polymerase</a></td>
</tr>
<tr>
<td style="width: 50%;">Site-Specific DNA-Methyltransferase (Cytosine-N(4)-Specific)</td>
<td style="width: 50%;"><a href="https://meshb.nlm.nih.gov/record/ui?ui=D057265">Site-Specific DNA-Methyltransferase (Cytosine-N4-Specific)</a></td>
</tr>
<tr>
<td style="width: 50%;">Social Distance</td>
<td style="width: 50%;"><a href="https://meshb.nlm.nih.gov/record/ui?ui=D012929">Psychological Distance</a></td>
</tr>
</tbody>
</table>
<p></p>
<a name="new_mesh"></a>
<h1>New MeSH Headings and Concepts</h1>
<p>277 new MeSH headings were added to MeSH in 2021.</p>
<p>A complete list of the new 2021 MeSH headings is available in PDF format, see <a href="https://www.nlm.nih.gov/mesh/2021/download/NewMeSHheadingsfor2021singlecolumnaftercutover.pdf">New Headings with Scope Notes, Annotations and Tree Locations</a>.</p>
<p>Typically, NLM does not retrospectively re-index MEDLINE citations with new MeSH heading concepts. Therefore, searching PubMed for a new MeSH term tagged with [mh] or [majr] effectively limits retrieval to citations indexed after the term was introduced. PubMed Automatic Term Mapping (ATM) expands an untagged subject search to include both MeSH Terms and All Fields index terms and may retrieve relevant citations indexed before the introduction of a new MeSH term. Searchers may consult the <a href="https://meshb.nlm.nih.gov/#/fieldSearch">MeSH Browser</a> or the <a href="https://www.ncbi.nlm.nih.gov/mesh">MeSH database</a> to see the previous indexing terms most likely used for a particular concept before the new MeSH heading was introduced.</p>
<p></p>
<a name="tree_changes"></a>
<h1>MeSH Tree Changes</h1>
<p>For a list of new MeSH headings by tree hierarchy, see 2021 New MeSH Headings by Subcategory available in <a href="https://www.nlm.nih.gov/mesh/2021/download/2021Newheadingsbycategorysinglecolumn508.pdf">PDF format</a>.</p>
<p>For a complete list of all MeSH headings by tree hierarchy, see 2021 MeSH Tree Locations available in <a href="https://www.nlm.nih.gov/mesh/2021/download/2021Newheadingsbycategorysinglecolumn508.pdf">PDF format</a>.</p>
<p></p>
<h1>Changes of particular interest to searchers:</h1>
<p>The new MeSH heading <a href="https://meshb.nlm.nih.gov/record/ui?ui=D000085682">Working Dogs</a> will also be indexed with the check tag Dog.</p>
<p>Three of the entry terms for the qualifier (subheading) &ldquo;<a href="https://meshb.nlm.nih.gov/record/ui?ui=Q000378">metabolism</a>&rdquo; were deleted because they were considered multi-meaning: incorporation, mobilization, and turnover.</p>
<p></p>
<a name="covid_terminology"></a>
<h1>COVID-19 Terminology:</h1>
<p>Starting in January 2020, new terms related to the 2019 novel coronavirus (SARS-CoV-2) and the resulting disease (COVID-19) were added to the MeSH vocabulary as SCRs.</p>
<p>Many of the SCRs related to SARS-Cov-2, COVID-19, and other older relevant SCRs were promoted to MeSH headings for 2021.</p>
<p>New MeSH headings and SCRs were created for 2021 as well. For a list of terms that might be of interest to searchers, see <a href="https://www.nlm.nih.gov/pubs/techbull/nd20/nd20_mesh_covid_terms.html"><em>COVID-19 and SARS-CoV-2 MeSH Terms&mdash;2021</em></a>.</p>
<p>Additional SCRs will be created as needed throughout 2021. Please continue to check the MeSH Browser for new SCRs.</p>
<p></p>
<a name="special_projects"></a>
<h1>Special MeSH Projects</h1>
<p>Several special projects resulted in the following new 2021 MeSH headings:</p>
<h2><strong>New and Updated Behavioral and Social Science Headings:</strong></h2>
<p>As part of an ongoing project to incorporate terminology from the NIH Office of Behavioral and Social Sciences Research into the MeSH vocabulary, new entry terms and MeSH headings were created.</p>
<p>For example, new entry terms:</p>
<ul>
<li>Alcohol Problem was added as an entry term to <a href="https://meshb.nlm.nih.gov/record/ui?ui=D019973">Alcohol-Related Disorders</a></li>
<li>Anxiousness was added as an entry term to <a href="https://meshb.nlm.nih.gov/record/ui?ui=D001007">Anxiety</a></li>
<li>Child Well-Being (and spelling variants) was added as an entry term to <a href="https://meshb.nlm.nih.gov/record/ui?ui=D000067576">Child Health</a></li></ul>
<p>For example, new Headings:</p>
<ul>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000083684">Economic Factors</a></li>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000084803">Gender Equity</a></li>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000083282">Social Cognition</a></li>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000083663">Social Factors</a></li>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000083644">Social Inclusion</a></li>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000083505">Social Interaction</a></li>
</ul>
<h2><strong>New Cardiovascular Headings:</strong></h2>
<ul>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000082862">Aortic Valve Disease</a></li>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000082903">Aortico-Ventricular Tunnel</a></li>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000082882">Bicuspid Aortic Valve Disease</a></li>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000084122">Cardiac Papillary Fibroelastoma</a></li>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000083302">Hemorrhagic Stroke</a></li>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000083242">Ischemic Stroke</a></li>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000083244">Thrombotic Stroke</a></li>
</ul>
<h2><strong>New Food and Beverage Headings:</strong></h2>
<ul>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000085584">Food Deserts</a></li>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000084884">Food Insecurity</a></li>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000082302">Food Security</a></li>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000084902">Sustenance</a></li>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000085222">Water Insecurity</a></li>
</ul>
<h2><strong>New Infection Headings:</strong></h2>
<ul>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000086966">Bacterial Zoonoses</a></li>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000086982">Blood-Borne Infections</a></li>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000082922">HIV Testing</a></li>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000085343">Latent Infection</a></li>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000084063">Reinfection</a></li>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000086965">Viral Zoonoses</a></li>
</ul>
<h2><strong>New and Updated Organism Headings:</strong></h2>
<h3>Bacteria:</h3>
<ul>
<li>As a part of an ongoing project that began in 2018, bacteria terms were updated. New genera of bacteria were added and some bacteria were reclassified.
<ul>
<li>For example:
<ul>
<li>New genus: <a href="https://meshb.nlm.nih.gov/record/ui?ui=D000082682">Clostridioides</a>
<ul>
<li>Clostridium difficile was reclassified as <a href="https://meshb.nlm.nih.gov/record/ui?ui=D016360">Clostridioides difficile</a> and Clostridium difficile was retained as an entry term.</li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
</ul>
<h3>Fungi:</h3>
<ul>
<li>New fungus terms were updated as part of an ongoing project to update this vocabulary.</li>
<li>New entry terms were added to existing fungal infection headings and SCRs. For example,
<ul>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000084642">Fungal Genus Humicola</a></li>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000084828">Fungal Genus Venturia</a></li>
</ul>
</li>
<li>Note that MeSH follows the NCBI Taxonomy convention of grouping various nomenclatural and taxonomic synonyms together in one MeSH record. This includes grouping together homotypic and heterotypic synonyms and anamorphs and teleomorphs.</li>
</ul>
<h3>Viruses:</h3>
<ul>
<li>Additional terminology for virus physiology and genetic phenomena was added. For example,
<ul>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000086482">Viral Genome Packaging</a></li>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000086502">Viral Packaging Sequence</a></li>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000086969">Viral Replication Compartments</a></li>
</ul>
</li>
<li>RNA viruses were separated into three groups:
<ul>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000086122">Double Stranded RNA Viruses</a></li>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000086103">Negative-Sense RNA Viruses</a></li>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000085102">Positive-Strand RNA Viruses</a></li>
</ul>
</li>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000086402">SARS-COV-2</a> was promoted from a SCR to a MeSH heading.</li>
<li>SCRs were created for more coronaviruses.
<ul>
<li>For example:
<ul>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=C000705267">porcine coronavirus HKU15</a></li>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=C000705252">thrush coronavirus HKU12</a></li>
</ul>
</li>
</ul>
</li>
</ul>
<h2><strong>New Persons Headings:</strong></h2>
<ul>
<li>>American Natives</li>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000086682">Indigenous Canadians</a></li>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000085924">Metal Workers</a></li>
<li><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000082383">Psychotherapists</a></li>
</ul>
<p></p>
<a name="confuse"></a>
<h1>Do Not Confuse:</h1>
<p><a href="https://meshb.nlm.nih.gov/record/ui?ui=D057805">Pets</a>, <a href="https://meshb.nlm.nih.gov/record/ui?ui=D000081822">Service Animals</a>, <a href="https://meshb.nlm.nih.gov/record/ui?ui=D000085703">Therapy Animals</a>, and <a href="https://meshb.nlm.nih.gov/record/ui?ui=D000085682">Working Dogs</a> with one another.</p>
<ul>
<li>Pets are kept by humans for companionship and enjoyment.</li>
<li>Service Animals are trained to do work or perform tasks for an individual with a disability.</li>
<li>Therapy Animals are generally registered, trained, and screened, but are not covered by laws as are service animals.</li>
<li>Working Dogs are trained to perform practical tasks, as opposed pets or companion dogs.</li>
</ul>
<p><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000085762">Physical Distancing</a> (has the entry term Social Distancing) with <a href="https://meshb.nlm.nih.gov/record/ui?ui=D012929">Psychological Distance</a>, which replaced the MeSH heading Social Distance in 2021.</p>
<p><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000086322">Rappaport</a>, which is a genus of gram-negative bacteria, with the author last name Rappaport.</p>
<p><a href="https://meshb.nlm.nih.gov/record/ui?ui=D012008">Recurrence</a> with <a href="https://meshb.nlm.nih.gov/record/ui?ui=D000084063">Reinfection</a>, which is infection by the same infectious agent following a recovery. Reinfection may be by a different strain or reactivation of the same strain.</p>
<p><span style="font-weight: normal !msorm;"><strong>Other Changes</strong></span></p>
<p>In addition to changes and deletions of MeSH terms on MEDLINE citations, YEP includes other adjustments to reflect 2021 MeSH vocabulary and enhance search retrieval. These follow-on adjustments are largely meant to add additional MeSH headings or Supplementary Concept Record Names to citations in order to help searchers refine retrieval. In some cases, the changes clarify areas where a single concept existed before but is now represented by two or more specific concepts.</p>
<p></p>
<a name="entry_combination"></a>
<h1>Entry Combination Revisions</h1>
<p>This year during YEP, NLM will again retrospectively replace certain MeSH heading/subheading combinations, known as Entry Combinations, with the new pre-coordinated MeSH heading. If you get no retrieval for a MeSH heading/subheading combination, check the heading in the 2020 MeSH Browser to see if the Entry Combination information indicates a different term.</p>
<p>There were two new Entry Combinations for 2021.</p>
<p></p>
<table style="width: 90%; border-collapse: collapse;">
<tbody>
<tr>
<td style="width: 50%;"><strong>Previous MeSH Heading/Subheading<br />(Entry Combination)</strong></td>
<td style="width: 50%;"><strong>Replaced-by Heading for 2021</strong></td>
</tr>
<tr>
<td style="width: 50%;">Immune Checkpoint Proteins/antagonists &amp; inhibitors</td>
<td style="width: 50%;"><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000082082">Immune Checkpoint Inhibitors</a></td>
</tr>
<tr>
<td style="width: 50%;">Viral Proteases/antagonists &amp; inhibitors</td>
<td style="width: 50%;"><a href="https://meshb.nlm.nih.gov/record/ui?ui=D000084762">Viral Protease Inhibitors</a></td>
</tr>
</tbody>
</table>
<p></p>
<a name="distribution"></a>
<h1>Other News:</h1>
<h2>Data Distribution Notes</h2>
<p>There is no change to the PubMed DTD for 2021. The DTD dated 010119 is still valid.</p>
<p>Because there are no changes to the PubMed DTD, NLM will not create new sample data for 2020.</p>
<p>More information and announcements can be found at <a href="https://www.nlm.nih.gov/databases/download/pubmed_medline.html">Download MEDLINE/PubMed Data.</a></p>
<a name="ncbi_taxonomy"></a>
<h2>NCBI Taxonomy Identifiers</h2>
<p>Beginning in 2020, NCBI Taxonomy Identifiers (txid) have been added to MeSH records as Registry Numbers (RNs) for SCR-Class 4 Organisms. This project has been expanded to add these identifiers to MeSH headings in Category B1-B4 (Organisms) for the 2021 MeSH vocabulary.</p>
<p>At this time, the NCBI Taxonomy Identifiers will not be carried as metadata on MEDLINE citations.</p>
<p>The NCBI Taxonomy Identifiers are available to view in the MeSH Browser where they are displayed in the Registry Number field and denoted by the prefix of txid. NCBI Taxonomy Identifiers are unique numerical identifiers between one and seven digits that are assigned by NCBI to organisms. For example, the NCBI Taxonomy Identifier for <a href="https://meshb.nlm.nih.gov/record/ui?ui=D000086402">SARS-Cov-2</a> is displayed as Registry Number txid2697049.</p>
<p>For more information on the NCBI Taxonomy Identifiers, see <a href="https://www.nlm.nih.gov/pubs/techbull/nd20/nd20_mesh_ncbi_taxonomy.html"><em>NCBI Taxonomy Identifiers Added to MeSH</em></a>.</p>
</div>
<p class="articleParagraph">
By
Sara Tybaert<br />
MEDLARS Management Section<br />
</p>
</div>
<div class="footer">
<p class="footerLeft"><span class="footerissn"><strong>ISSN 2161-2986 (Online)</strong> Content not copyrighted; freely reproducible.</span><br/>
<a href="/">National Library of Medicine</a> 8600 Rockville Pike, Bethesda, MD 20894
<br/>
<a href="//www.nlm.nih.gov/socialmedia/index.html">Connect with NLM</a>,
<a href="//www.nlm.nih.gov/web_policies.html">Web Policies</a>,
<a href="//www.nlm.nih.gov/careers/jobopenings.html">Careers</a>,
<a href="//www.nlm.nih.gov/accessibility.html">Accessibility</a>,
<a href="//www.usa.gov/" id="anch_34">USA.gov</a>,
<a href="//www.hhs.gov/vulnerability-disclosure-policy/index.html">HHS Vulnerability Disclosure</a>
<br/>
<a href="//www.nih.gov/">NIH</a>,
<a href="https://www.hhs.gov/">HHS</a>,
<a href="//www.nih.gov/institutes-nih/nih-office-director/office-communications-public-liaison/freedom-information-act-office">FOIA</a>,
<a class="supportLink" href="//support.nlm.nih.gov?from=" target="_blank">NLM Support Center</a>
</p>
<p class="footerRight">
<strong>Last updated:</strong> 12 March 2024</p>
</div>
</div>
<map id="nlm_masthead_113" name="nlm_masthead_113">
<area shape="rect" alt="NLM Technical Bulletin" coords="1,15,396,45" href="//www.nlm.nih.gov/pubs/techbull/tb.html" title="NLM Technical Bulletin" />
<area shape="rect" alt="National Library of Medicine" coords="0,47,203,62" href="//www.nlm.nih.gov/" title="National Library of Medicine" />
<area shape="rect" coords="207,47,396,62" href="//www.nih.gov/" alt="National Institutes of Health" title="" />
</map>
<!--*****************************Content end*******************************-->
<script src="/scripts/support.js"></script>
<script src="/core/nlm-notifyExternal/1.0/nlm-notifyExternal.min.js"></script>
</body>
</html>
Reference in a new issue View git blame Copy permalink