{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,14]],"date-time":"2026-10-14T03:30:19Z","timestamp":1791948619335,"version":"4.3.4"},"reference-count":44,"publisher":"American Society for Microbiology","issue":"1","license":[{"start":{"date-parts":[[2014,2,18]],"date-time":"2014-02-18T00:00:00Z","timestamp":1392681600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/3.0\/"},{"start":{"date-parts":[[2014,2,28]],"date-time":"2014-02-28T00:00:00Z","timestamp":1393545600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.asm.org\/non-commercial-tdm-license"}],"content-domain":{"domain":["journals.asm.org"],"crossmark-restriction":true},"short-container-title":["mBio"],"published-print":{"date-parts":[[2014,2,28]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n          <jats:p>\n            The Middle East respiratory syndrome coronavirus (MERS-CoV) was first documented in the Kingdom of Saudi Arabia (KSA) in 2012 and, to date, has been identified in 180 cases with 43% mortality. In this study, we have determined the MERS-CoV evolutionary rate, documented genetic variants of the virus and their distribution throughout the Arabian peninsula, and identified the genome positions under positive selection, important features for monitoring adaptation of MERS-CoV to human transmission and for identifying the source of infections. Respiratory samples from confirmed KSA MERS cases from May to September 2013 were subjected to whole-genome deep sequencing, and 32 complete or partial sequences (20 were \u226599% complete, 7 were 50 to 94% complete, and 5 were 27 to 50% complete) were obtained, bringing the total available MERS-CoV genomic sequences to 65. An evolutionary rate of 1.12 \u00d7 10\n            <jats:sup>\u22123<\/jats:sup>\n            substitutions per site per year (95% credible interval [95% CI], 8.76 \u00d7 10\n            <jats:sup>\u22124<\/jats:sup>\n            ; 1.37 \u00d7 10\n            <jats:sup>\u22123<\/jats:sup>\n            ) was estimated, bringing the time to most recent common ancestor to March 2012 (95% CI, December 2011; June 2012). Only one MERS-CoV codon, spike 1020, located in a domain required for cell entry, is under strong positive selection. Four KSA MERS-CoV phylogenetic clades were found, with 3 clades apparently no longer contributing to current cases. The size of the population infected with MERS-CoV showed a gradual increase to June 2013, followed by a decline, possibly due to increased surveillance and infection control measures combined with a basic reproduction number (\n            <jats:italic>R<\/jats:italic>\n            <jats:sub>0<\/jats:sub>\n            ) for the virus that is less than 1.\n          <\/jats:p>\n          <jats:p>\n            <jats:bold>IMPORTANCE<\/jats:bold>\n            MERS-CoV adaptation toward higher rates of sustained human-to-human transmission appears not to have occurred yet. While MERS-CoV transmission currently appears weak, careful monitoring of changes in MERS-CoV genomes and of the MERS epidemic should be maintained. The observation of phylogenetically related MERS-CoV in geographically diverse locations must be taken into account in efforts to identify the animal source and transmission of the virus.\n          <\/jats:p>","DOI":"10.1128\/mbio.01062-13","type":"journal-article","created":{"date-parts":[[2014,2,19]],"date-time":"2014-02-19T04:33:32Z","timestamp":1392784412000},"update-policy":"https:\/\/doi.org\/10.1128\/asmj-crossmark-policy-page","source":"Crossref","is-referenced-by-count":220,"title":["Spread, Circulation, and Evolution of the Middle East Respiratory Syndrome Coronavirus"],"prefix":"10.1128","volume":"5","author":[{"given":"Matthew","family":"Cotten","sequence":"first","affiliation":[{"name":"Wellcome Trust Sanger Institute, Hinxton, United Kingdom"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Simon J.","family":"Watson","sequence":"additional","affiliation":[{"name":"Wellcome Trust Sanger Institute, Hinxton, United 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A.","family":"Al-Tawfiq","sequence":"additional","affiliation":[{"name":"Saudi Aramco Medical Services Organization, Saudi Aramco, Dhahran, Kingdom of Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ali","family":"Albarrak","sequence":"additional","affiliation":[{"name":"Prince Sultan Military Medical City, Riyadh, Kingdom of Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mazin","family":"Barry","sequence":"additional","affiliation":[{"name":"King Saud University, Riyadh, Kingdom of Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Atef","family":"Shibl","sequence":"additional","affiliation":[{"name":"King Saud University, Riyadh, Kingdom of Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fahad A.","family":"Alrabiah","sequence":"additional","affiliation":[{"name":"King Faisal Specialist Hospital, Riyadh, Kingdom of Saudi 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