Epidemiological status of the Middle East respiratory syndrome coronavirus in 2019: an update from January 1 to March 31, 2019
Identifieur interne : 000D44 ( Pmc/Corpus ); précédent : 000D43; suivant : 000D45Epidemiological status of the Middle East respiratory syndrome coronavirus in 2019: an update from January 1 to March 31, 2019
Auteurs : Jamal Ahmadzadeh ; Kazhal MobarakiSource :
- International Journal of General Medicine [ 1178-7074 ] ; 2019.
Abstract
This study represents the current epidemiological status of Middle East respiratory syndrome coronavirus (MERS-CoV) worldwide in the first three months of 2019.
Full details of the MERS-CoV cases available and published in the disease outbreak news on the WHO website were retrieved. Related details of laboratory-confirmed MERS-CoV were extracted and analyzed by standard statistical methods.
A total of 107 cases of MERS-CoV, including 18 deaths (overall case fatality rate (CFR), 16.8%; male-specific CFR was 17.5% [14/80] and female-specific CFR was 14.8% [4/27]) were reported to WHO from the National International Health Regulation Focal Points of Saudi Arabia and Oman. The overall mean age was 50±17 years and 80 patients (74.8%) were male. The average time from the onset of the symptoms to the first hospitalization was 3±3.3 days; from the first hospitalization to laboratory confirmation was 3.6±6.5 days; from the onset of symptom to death was 17.5±11.7 days; and the mean length of hospitalization for patients with MERS-CoV was 3.5±3.9 days. Males in comparison to females had a 1.5-fold increased chance (adjusted OR =1.5 [95% CI: 1.3–1.8]) of death related to MERS-CoV infection; 1.05 [95% CI: 1.1–3.3], 1.05 [95% CI: 1.2–2.8] and 1.06 [95% CI: 1.2–2.0] for those who had exposure to camels, camel milk consumption, and close contact with MERS-CoV cases, respectively. Health care workers had 2.4 fold [95% CI: 1.2–3.1] greater odds of death compared to other people.
The knowledge obtained from this study can contribute to the development of a prevention program and early system warning against MERS-CoV infection.
Url:
DOI: 10.2147/IJGM.S215396
PubMed: 31692574
PubMed Central: 6716594
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Epidemiological status of the Middle East respiratory syndrome coronavirus in 2019: an update from January 1 to March 31, 2019</title><author><name sortKey="Ahmadzadeh, Jamal" sort="Ahmadzadeh, Jamal" uniqKey="Ahmadzadeh J" first="Jamal" last="Ahmadzadeh">Jamal Ahmadzadeh</name><affiliation><nlm:aff id="AFF0001"><institution>Social Determinants of Health Research Center, Urmia University of Medical Sciences</institution>,<addr-line>Urmia</addr-line>,<country>Iran</country></nlm:aff></affiliation></author><author><name sortKey="Mobaraki, Kazhal" sort="Mobaraki, Kazhal" uniqKey="Mobaraki K" first="Kazhal" last="Mobaraki">Kazhal Mobaraki</name><affiliation><nlm:aff id="AFF0001"><institution>Social Determinants of Health Research Center, Urmia University of Medical Sciences</institution>,<addr-line>Urmia</addr-line>,<country>Iran</country></nlm:aff></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">31692574</idno><idno type="pmc">6716594</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6716594</idno><idno type="RBID">PMC:6716594</idno><idno type="doi">10.2147/IJGM.S215396</idno><date when="2019">2019</date><idno type="wicri:Area/Pmc/Corpus">000D44</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">000D44</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Epidemiological status of the Middle East respiratory syndrome coronavirus in 2019: an update from January 1 to March 31, 2019</title><author><name sortKey="Ahmadzadeh, Jamal" sort="Ahmadzadeh, Jamal" uniqKey="Ahmadzadeh J" first="Jamal" last="Ahmadzadeh">Jamal Ahmadzadeh</name><affiliation><nlm:aff id="AFF0001"><institution>Social Determinants of Health Research Center, Urmia University of Medical Sciences</institution>,<addr-line>Urmia</addr-line>,<country>Iran</country></nlm:aff></affiliation></author><author><name sortKey="Mobaraki, Kazhal" sort="Mobaraki, Kazhal" uniqKey="Mobaraki K" first="Kazhal" last="Mobaraki">Kazhal Mobaraki</name><affiliation><nlm:aff id="AFF0001"><institution>Social Determinants of Health Research Center, Urmia University of Medical Sciences</institution>,<addr-line>Urmia</addr-line>,<country>Iran</country></nlm:aff></affiliation></author></analytic><series><title level="j">International Journal of General Medicine</title><idno type="eISSN">1178-7074</idno><imprint><date when="2019">2019</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><sec id="S2001"><title>Purpose</title><p>This study represents the current epidemiological status of Middle East respiratory syndrome coronavirus (MERS-CoV) worldwide in the first three months of 2019.</p></sec><sec id="S2002"><title>Patients and methods</title><p>Full details of the MERS-CoV cases available and published in the disease outbreak news on the WHO website were retrieved. Related details of laboratory-confirmed MERS-CoV were extracted and analyzed by standard statistical methods.</p></sec><sec id="S2003"><title>Results</title><p>A total of 107 cases of MERS-CoV, including 18 deaths (overall case fatality rate (CFR), 16.8%; male-specific CFR was 17.5% [14/80] and female-specific CFR was 14.8% [4/27]) were reported to WHO from the National International Health Regulation Focal Points of Saudi Arabia and Oman. The overall mean age was 50±17 years and 80 patients (74.8%) were male. The average time from the onset of the symptoms to the first hospitalization was 3±3.3 days; from the first hospitalization to laboratory confirmation was 3.6±6.5 days; from the onset of symptom to death was 17.5±11.7 days; and the mean length of hospitalization for patients with MERS-CoV was 3.5±3.9 days. Males in comparison to females had a 1.5-fold increased chance (adjusted OR =1.5 [95% CI: 1.3–1.8]) of death related to MERS-CoV infection; 1.05 [95% CI: 1.1–3.3], 1.05 [95% CI: 1.2–2.8] and 1.06 [95% CI: 1.2–2.0] for those who had exposure to camels, camel milk consumption, and close contact with MERS-CoV cases, respectively. Health care workers had 2.4 fold [95% CI: 1.2–3.1] greater odds of death compared to other people.</p></sec><sec id="S2004"><title>Conclusion</title><p>The knowledge obtained from this study can contribute to the development of a prevention program and early system warning against MERS-CoV infection.</p></sec></div></front><back><div1 type="bibliography"><listBibl><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct></listBibl></div1></back></TEI><pmc article-type="research-article"><pmc-dir>properties open_access</pmc-dir>
<front><journal-meta><journal-id journal-id-type="nlm-ta">Int J Gen Med</journal-id><journal-id journal-id-type="iso-abbrev">Int J Gen Med</journal-id><journal-id journal-id-type="publisher-id">IJGM</journal-id><journal-id journal-id-type="pmc">ijgm</journal-id><journal-title-group><journal-title>International Journal of General Medicine</journal-title></journal-title-group><issn pub-type="epub">1178-7074</issn><publisher><publisher-name>Dove</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="pmid">31692574</article-id><article-id pub-id-type="pmc">6716594</article-id><article-id pub-id-type="publisher-id">215396</article-id><article-id pub-id-type="doi">10.2147/IJGM.S215396</article-id><article-categories><subj-group subj-group-type="heading"><subject>Original Research</subject></subj-group></article-categories><title-group><article-title>Epidemiological status of the Middle East respiratory syndrome coronavirus in 2019: an update from January 1 to March 31, 2019</article-title><alt-title alt-title-type="running-authors">Ahmadzadeh and Mobaraki</alt-title><alt-title alt-title-type="running-title">Ahmadzadeh and Mobaraki</alt-title></title-group><contrib-group><contrib contrib-type="author"><name><surname>Ahmadzadeh</surname><given-names>Jamal</given-names></name><xref ref-type="aff" rid="AFF0001">1</xref></contrib><contrib contrib-type="author"><name><surname>Mobaraki</surname><given-names>Kazhal</given-names></name><xref ref-type="corresp" rid="AN0001"></xref><xref ref-type="aff" rid="AFF0001">1</xref></contrib><aff id="AFF0001"><label>1</label><institution>Social Determinants of Health Research Center, Urmia University of Medical Sciences</institution>,<addr-line>Urmia</addr-line>,<country>Iran</country></aff></contrib-group><author-notes><corresp id="AN0001">Correspondence: Kazhal Mobaraki<institution>Epidemiologist in Social Determinants of Health Research Center, Urmia University of Medical Sciences</institution>, <addr-line>Resalat Street</addr-line>, <addr-line>Urmia</addr-line>, <country>Iran</country><phone>Tel +98 918 173 2869</phone><fax>Fax +98 443 224 0642</fax>Email Mobaraki.k@umsu.ac.ir</corresp></author-notes><pub-date pub-type="epub"><day>26</day><month>8</month><year>2019</year></pub-date><pub-date pub-type="collection"><year>2019</year></pub-date><volume>12</volume><fpage>305</fpage><lpage>311</lpage><history><date date-type="received"><day>11</day><month>5</month><year>2019</year></date><date date-type="accepted"><day>08</day><month>8</month><year>2019</year></date></history><permissions><copyright-statement>© 2019 Ahmadzadeh and Mobaraki.</copyright-statement><copyright-year>2019</copyright-year><copyright-holder>Ahmadzadeh and Mobaraki.</copyright-holder><license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by-nc/3.0/"><license-p>This work is published and licensed by Dove Medical Press Limited. The full terms of this license are available at <ext-link ext-link-type="uri" xlink:href="https://www.dovepress.com/terms.php">https://www.dovepress.com/terms.php</ext-link> and incorporate the Creative Commons Attribution – Non Commercial (unported, v3.0) License (<ext-link ext-link-type="uri" xlink:href="http://creativecommons.org/licenses/by-nc/3.0/">http://creativecommons.org/licenses/by-nc/3.0/</ext-link>). By accessing the work you hereby accept the Terms. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed. For permission for commercial use of this work, please see paragraphs 4.2 and 5 of our Terms (<ext-link ext-link-type="uri" xlink:href="https://www.dovepress.com/terms.php">https://www.dovepress.com/terms.php</ext-link>).</license-p></license></permissions><abstract><sec id="S2001"><title>Purpose</title><p>This study represents the current epidemiological status of Middle East respiratory syndrome coronavirus (MERS-CoV) worldwide in the first three months of 2019.</p></sec><sec id="S2002"><title>Patients and methods</title><p>Full details of the MERS-CoV cases available and published in the disease outbreak news on the WHO website were retrieved. Related details of laboratory-confirmed MERS-CoV were extracted and analyzed by standard statistical methods.</p></sec><sec id="S2003"><title>Results</title><p>A total of 107 cases of MERS-CoV, including 18 deaths (overall case fatality rate (CFR), 16.8%; male-specific CFR was 17.5% [14/80] and female-specific CFR was 14.8% [4/27]) were reported to WHO from the National International Health Regulation Focal Points of Saudi Arabia and Oman. The overall mean age was 50±17 years and 80 patients (74.8%) were male. The average time from the onset of the symptoms to the first hospitalization was 3±3.3 days; from the first hospitalization to laboratory confirmation was 3.6±6.5 days; from the onset of symptom to death was 17.5±11.7 days; and the mean length of hospitalization for patients with MERS-CoV was 3.5±3.9 days. Males in comparison to females had a 1.5-fold increased chance (adjusted OR =1.5 [95% CI: 1.3–1.8]) of death related to MERS-CoV infection; 1.05 [95% CI: 1.1–3.3], 1.05 [95% CI: 1.2–2.8] and 1.06 [95% CI: 1.2–2.0] for those who had exposure to camels, camel milk consumption, and close contact with MERS-CoV cases, respectively. Health care workers had 2.4 fold [95% CI: 1.2–3.1] greater odds of death compared to other people.</p></sec><sec id="S2004"><title>Conclusion</title><p>The knowledge obtained from this study can contribute to the development of a prevention program and early system warning against MERS-CoV infection.</p></sec></abstract><kwd-group kwd-group-type="author"><title>Keywords</title><kwd>Middle East respiratory syndrome coronavirus</kwd><kwd>emerging infectious disease</kwd><kwd>disease outbreaks</kwd></kwd-group><counts><fig-count count="2"></fig-count><table-count count="3"></table-count><ref-count count="22"></ref-count><page-count count="7"></page-count></counts></article-meta></front><body><sec sec-type="intro" id="S0001"><title>Introduction</title><p>Human coronaviruses (hCoV) usually causes mild-to-moderate upper respiratory tract illnesses.<xref rid="CIT0001" ref-type="bibr">1</xref> One of these hCoV is the Middle East respiratory syndrome (MERS) which is a viral respiratory disease caused by a novel coronavirus (Middle East respiratory syndrome coronavirus, or MERS‐CoV). MERS‐CoV belongs to the genus “<italic>Betacoronavirus</italic>” that is an emerging zoonotic virus considered as one of the major public threats and causes severe and fatal respiratory illness in humans.<xref rid="CIT0002" ref-type="bibr">2</xref>,<xref rid="CIT0003" ref-type="bibr">3</xref> This infection is different from any other known hCoVs that have the possibility of human and zoonotic transmissions.<xref rid="CIT0004" ref-type="bibr">4</xref> The patterns of transmission and origins of MERS CoV remain unclear, and based on the analysis of different virus genomes, it is declared that it may have originated in bats and was transmitted to camels sometime in the distant past. Although an animal reservoir is suspected, none has been discovered. Meanwhile, global concern rests on the ability of MERS-CoV to cause major illness in close contacts of patients.<xref rid="CIT0005" ref-type="bibr">5</xref> The clinical spectrum of MERS-CoV infection ranges from subclinical infections to severe respiratory diseases and death.<xref rid="CIT0006" ref-type="bibr">6</xref></p><p>MERS-CoV first isolated in September 2012 from a patient with fatal pneumonia in Jeddah, Saudi Arabia.<xref rid="CIT0007" ref-type="bibr">7</xref> Since then, 27 countries in the worldwide have reported cases of MERS including the United Kingdom, United States, Austria, Algeria, China, France, Greece, Italy, Kuwait, Thailand, Lebanon, Egypt, the Netherlands, Germany, Islamic Republic of Iran, Oman, Philippines, Qatar, Jordan, SouthKorea, Kingdom of Saudi Arabia, Malaysia, Tunisia, Turkey, United Arab Emirates, Yemen, and Bahrain.<xref rid="CIT0005" ref-type="bibr">5</xref> Globally, from September 2012 until 24 April 2019, WHO has been notified of 2374 laboratory-confirmed cases of infection with MERS-CoV including 823 associated deaths from 27 countries worldwide.<xref rid="CIT0008" ref-type="bibr">8</xref></p><p>As per the author’s knowledge, since the onset of MERS-CoV outbreak, several studies have been conducted on various aspects of this disease, including genome combinations, clinical manifestations, pathogenesis, diagnosis, and treatment. However, there are still gaps in the knowledge of this disease, and monitoring and periodical assessment of this emerging infection in an epidemiological study format seem to be necessary. After 8 years from the onset of the MERS-CoV outbreak, this infection is still considered as a public health threat with no vaccine or specific treatment and also with some unknown epidemiological aspects related to it. Strategies to contain the MERS-CoV depends on providing epidemiological knowledge about this infection. This study represents the current epidemiological status (mortality risk, identify potential risk factor, and geographical distribution) of the MERS-CoV in the world in 2019 and identified and highlighted the most probable risk factors related to this infection.</p></sec><sec id="S0002"><title>Materials and methods</title><p>In this cross-sectional study, by the census method, data relating to laboratory-confirmed MERS-CoV human cases from the 1st of January 2019 until the 31st of March 2019 were retrieved from the disease outbreak news on MERS-CoV from the WHO website (<ext-link ext-link-type="uri" xlink:href="https://www.who.int/csr/don/archive/disease/coronavirus_infections/en/">https://www.who.int/csr/don/archive/disease/coronavirus_infections/en/</ext-link>). At the time of writing, 107 MERS patients were reported to WHO. Relevant details were extracted regarding the geographical distribution of laboratory-confirmed MERS-CoV such as the number of cases, country of infection, and period of morbidity.</p><p>Demographic and clinical data extracted included age, sex, health care worker or not, had comorbidities or not, exposure to camels, camel milk consumption, exposure to MERS-CoV cases, day/month of the onset of symptoms, day/month of first hospitalization, day/month of laboratory confirmation, and the outcome for each confirmed case (ie death/alive).</p><sec id="S0002-S2001"><title>Statistical analysis</title><p>All statistical analyses were conducted using SPSS, version 21 (IBM Inc., Armonk, NY, USA). Quantitative and qualitative variables were presented as absolute frequencies, proportions for categorical variables, and interquartile ranges for continuous variables. Independent <italic>t</italic>-test was used for surveying the mean difference of some quantitative variables by gender. Logistic regression was used to assess the relationship between probable risk factors and outcome (death/survival) of laboratory-confirmed MERS-CoV cases. A <italic>P</italic>-value of less than 0.05 was considered to indicate statistical significance.</p></sec></sec><sec id="S0003"><title>Results</title><p>As of 1st of January 2019 until 31st of March 2019, a total of 107 cases of MERS-CoV, including 18 deaths (overall CFR, 16.8%; male-specific CFR was 17.5% [14/80] and female-specific CFR was %14.8[4/27]), were reported to WHO from the National IHR Focal Points of Saudi Arabia and Oman. The mean age of all patients was 50±17 years (range 16–94) and 80 patients (74.8%) were male. The average time from symptoms onset to the first hospitalization was3±3.3 days [range 0 until 13]. The average time from to the first hospitalization to laboratory confirmation was 3.6±6.5 days [range 1 until 29], the average time from onset of symptom to death was 17.5±11.7 days [range 1 until 41], and the mean of hospitalization for patient with MERS-CoV was 3.5±3.9 days [range 1 until 23]. A total of 64 patients (59.8%) had comorbidities. Sixteen (15%) MERS cases were health care workers. The characteristics of the population can be found in <xref rid="T0001" ref-type="table">Table 1</xref>.<table-wrap id="T0001" orientation="portrait" position="float"><label>Table 1</label><caption><p>Patient characteristics of 107 MERS-CoV cases from the 1st of January 2019 until 31st of March 2019 (as per WHO data)</p></caption><table frame="hsides" rules="groups"><thead><tr><th rowspan="1" colspan="1">Qualitative variables</th><th rowspan="1" colspan="1">Subgroups</th><th rowspan="1" colspan="1">N</th><th rowspan="1" colspan="1">%</th><th rowspan="1" colspan="1">p-value</th></tr></thead><tbody><tr><td rowspan="2" colspan="1">Age groups</td><td rowspan="1" colspan="1">16-30</td><td rowspan="1" colspan="1">12</td><td rowspan="1" colspan="1">11.2</td><td rowspan="2" colspan="1">0.002</td></tr><tr><td rowspan="1" colspan="1">31-60</td><td rowspan="1" colspan="1">63</td><td rowspan="1" colspan="1">58.9</td></tr><tr><td rowspan="1" colspan="1">61 and upper</td><td rowspan="1" colspan="1">32</td><td rowspan="1" colspan="1">29.9</td></tr><tr><td rowspan="1" colspan="1">Gender</td><td rowspan="1" colspan="1">Male</td><td rowspan="1" colspan="1">80</td><td rowspan="1" colspan="1">74.8</td><td rowspan="1" colspan="1">0.005</td></tr><tr><td rowspan="1" colspan="1">Female</td><td rowspan="1" colspan="1">27</td><td rowspan="1" colspan="1">25.2</td></tr><tr><td rowspan="1" colspan="1">Reporting country</td><td rowspan="1" colspan="1">Saudi Arabia</td><td rowspan="1" colspan="1">94</td><td rowspan="1" colspan="1">87.9</td><td rowspan="1" colspan="1">0.020</td></tr><tr><td rowspan="1" colspan="1">Oman</td><td rowspan="1" colspan="1">13</td><td rowspan="1" colspan="1">12.1</td></tr><tr><td rowspan="1" colspan="1">Health care worker</td><td rowspan="1" colspan="1">Yes</td><td rowspan="1" colspan="1">16</td><td rowspan="1" colspan="1">15.0</td><td rowspan="1" colspan="1">0.001</td></tr><tr><td rowspan="1" colspan="1">No</td><td rowspan="1" colspan="1">91</td><td rowspan="1" colspan="1">85.0</td></tr><tr><td rowspan="1" colspan="1">Comorbidities</td><td rowspan="1" colspan="1">Yes</td><td rowspan="1" colspan="1">64</td><td rowspan="1" colspan="1">59.8</td><td rowspan="1" colspan="1">0.026</td></tr><tr><td rowspan="1" colspan="1">No</td><td rowspan="1" colspan="1">43</td><td rowspan="1" colspan="1">40.2</td></tr><tr><td rowspan="1" colspan="1">Exposure to camels</td><td rowspan="1" colspan="1">Yes</td><td rowspan="1" colspan="1">53</td><td rowspan="1" colspan="1">49.5</td><td rowspan="1" colspan="1">0.281</td></tr><tr><td rowspan="1" colspan="1">No</td><td rowspan="1" colspan="1">54</td><td rowspan="1" colspan="1">50.5</td></tr><tr><td rowspan="1" colspan="1">Camel milk consumption</td><td rowspan="1" colspan="1">Yes</td><td rowspan="1" colspan="1">54</td><td rowspan="1" colspan="1">50.5</td><td rowspan="1" colspan="1">0.322</td></tr><tr><td rowspan="1" colspan="1">No</td><td rowspan="1" colspan="1">53</td><td rowspan="1" colspan="1">49.5</td></tr><tr><td rowspan="1" colspan="1">Exposure to MERS-CoV cases</td><td rowspan="1" colspan="1">Yes</td><td rowspan="1" colspan="1">68</td><td rowspan="1" colspan="1">63.6</td><td rowspan="1" colspan="1">0.506</td></tr><tr><td rowspan="1" colspan="1">No</td><td rowspan="1" colspan="1">39</td><td rowspan="1" colspan="1">36.4</td></tr><tr><td rowspan="1" colspan="1">Final outcome</td><td rowspan="1" colspan="1">Died</td><td rowspan="1" colspan="1">18</td><td rowspan="1" colspan="1">16.8</td><td rowspan="1" colspan="1">0.033</td></tr><tr><td rowspan="1" colspan="1">Alive</td><td rowspan="1" colspan="1">89</td><td rowspan="1" colspan="1">83.2</td></tr><tr><td rowspan="1" colspan="1"><bold>Quantitative variables</bold></td><td colspan="4" rowspan="1"><bold>Value</bold></td></tr><tr><td rowspan="1" colspan="1">Age range (year)</td><td colspan="4" rowspan="1">16-94</td></tr><tr><td rowspan="1" colspan="1">Mean age overall (years)</td><td colspan="4" rowspan="1">50±17</td></tr><tr><td rowspan="1" colspan="1">Sex ratio (male/female)</td><td colspan="4" rowspan="1">2.9[80/27]</td></tr><tr><td rowspan="1" colspan="1">Overall CFR</td><td colspan="4" rowspan="1">%16.8[18/107]</td></tr><tr><td rowspan="1" colspan="1">Male-specific CFR</td><td colspan="4" rowspan="1">%17.5[14/80]</td></tr><tr><td rowspan="1" colspan="1">Female-specific CFR</td><td colspan="4" rowspan="1">%14.8[4/27]</td></tr><tr><td rowspan="1" colspan="1">CFR in patients with comorbidities</td><td colspan="4" rowspan="1">%23.4[15/64]</td></tr><tr><td rowspan="1" colspan="1">The average time from symptoms onset to first hospitalization(Day)</td><td colspan="4" rowspan="1">3±3.3 [range0 until 13]</td></tr><tr><td rowspan="1" colspan="1">The average time from to the first hospitalization to laboratory confirmation (Day)</td><td colspan="4" rowspan="1">3.6±6.5 [range 1 until 29]</td></tr><tr><td rowspan="1" colspan="1">The average time from onset to death (Day)</td><td colspan="4" rowspan="1">17.5±11.7 [range 1 until 41]</td></tr><tr><td rowspan="1" colspan="1">The mean of hospitalized days</td><td colspan="4" rowspan="1">3.5±3.9 [range 1 until 23]</td></tr></tbody></table></table-wrap></p><p><xref rid="T0002" ref-type="table">Table 2</xref> illustrates the mean difference of some quantitative variables by gender for 107 patients with the Middle East respiratory syndrome in the course of the present study. Among all the quantitative variables examined, only a statistically significant difference was observed from the onset of the symptom to the death between males and females (<italic>p</italic>=0.037). There was no significant difference in terms of other quantitative variables between males and females (<italic>p</italic>>0.05 for all).<table-wrap id="T0002" orientation="portrait" position="float"><label>Table 2</label><caption><p>The mean difference of some quantitative variables by gender for 107 patients with the MERS</p></caption><table frame="hsides" rules="groups"><thead><tr><th rowspan="2" colspan="1">Variables</th><th colspan="4" rowspan="1">Gender</th><th rowspan="1" colspan="1"><italic>P</italic>-value</th></tr><tr><th colspan="2" rowspan="1">Male</th><th colspan="2" rowspan="1">Female</th><th rowspan="1" colspan="1"></th></tr><tr><th rowspan="1" colspan="1">Mean</th><th rowspan="1" colspan="1">± SD</th><th rowspan="1" colspan="1">Mean</th><th rowspan="1" colspan="1">± SD</th><th rowspan="1" colspan="1"></th></tr></thead><tbody><tr><td rowspan="1" colspan="1">Age (years)</td><td rowspan="1" colspan="1">50.2</td><td rowspan="1" colspan="1">16.0</td><td rowspan="1" colspan="1">49.1</td><td rowspan="1" colspan="1">19.4</td><td rowspan="1" colspan="1">0.771</td></tr><tr><td rowspan="1" colspan="1">The time from symptoms onset to first hospitalization (days)</td><td rowspan="1" colspan="1">3.0</td><td rowspan="1" colspan="1">3.5</td><td rowspan="1" colspan="1">2.5</td><td rowspan="1" colspan="1">2.5</td><td rowspan="1" colspan="1">0.507</td></tr><tr><td rowspan="1" colspan="1">The time from the first hospitalization to laboratory confirmation (days)</td><td rowspan="1" colspan="1">3.5</td><td rowspan="1" colspan="1">6.6</td><td rowspan="1" colspan="1">3.8</td><td rowspan="1" colspan="1">6.3</td><td rowspan="1" colspan="1">0.798</td></tr><tr><td rowspan="1" colspan="1">The time from onset of symptom to death (days)</td><td rowspan="1" colspan="1">19.7</td><td rowspan="1" colspan="1">12.1</td><td rowspan="1" colspan="1">11.1</td><td rowspan="1" colspan="1">8.1</td><td rowspan="1" colspan="1">0.037</td></tr><tr><td rowspan="1" colspan="1">Hospitalized days</td><td rowspan="1" colspan="1">3.3</td><td rowspan="1" colspan="1">3.5</td><td rowspan="1" colspan="1">3.8</td><td rowspan="1" colspan="1">4.8</td><td rowspan="1" colspan="1">0.611</td></tr></tbody></table></table-wrap></p><p><xref rid="T0003" ref-type="table">Table 3</xref> illustrates the unadjusted and adjusted OR and 95% CI of risk for death in 107 patients with MERS-CoV. Based on these findings, the males in comparison to females had a 1.5-fold increased chance (Adjusted OR (AOR) =1.5[95% CI: 1.3–1.8]) of death related to MERS-CoV infection. In comparison to the age group of 16–30 years old, AOR estimates were 1.3[95% CI: 1.1–12.2] for the age group of 31–60 years old and 4.9[95% CI: 1.5–8.4] for the age group of ≥60 years old. AOR estimates were 4.0 [95% CI: 1.9–16.3] for patients who had comorbidity in comparison to those who had no comorbidity. Patients with Saudi nationality had 4.0-fold greater [95% CI: 1.9–16.3] odds of death in comparison to others; 0.05[95% CI: 1.1–3.3], 1.05 [95% CI: 1.2–2.8] and 1.06 [95% CI: 1.2–2.0] for those who had exposure to camels, camel milk consumption and close contact with MERS-CoV cases, respectively. Health care worker had 2. 4 fold greater [95% CI: 1.2–3.1] odds of death compared to other people in the community.<table-wrap id="T0003" orientation="portrait" position="float"><label>Table 3</label><caption><p>Crude and adjusted OR and 95% CI of risk for death for 107 patients with the MERS</p></caption><table frame="hsides" rules="groups"><thead><tr><th rowspan="1" colspan="1">Variables</th><th colspan="2" rowspan="1">Final outcome</th><th rowspan="1" colspan="1">Crude odds ratio <break></break>(95% CI)</th><th rowspan="1" colspan="1"><italic>p</italic>-value</th><th rowspan="1" colspan="1">Adjusted odds ratio (95% CI)</th><th rowspan="1" colspan="1"><italic>p</italic>-value</th></tr><tr><th rowspan="1" colspan="1">Death no. (%)</th><th rowspan="1" colspan="1">Alive no. (%)</th></tr></thead><tbody><tr><td rowspan="1" colspan="1"><bold>Gender</bold></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td rowspan="1" colspan="1"> Male</td><td rowspan="1" colspan="1">14</td><td rowspan="1" colspan="1">66</td><td rowspan="1" colspan="1">1.2 [0.3–4.0]</td><td rowspan="1" colspan="1">0.747</td><td rowspan="1" colspan="1">1.5[1.3–1.8]<sup>a</sup></td><td rowspan="1" colspan="1">0.003</td></tr><tr><td rowspan="1" colspan="1"> Female</td><td rowspan="1" colspan="1">4</td><td rowspan="1" colspan="1">23</td><td rowspan="1" colspan="1">1.00</td><td rowspan="1" colspan="1">1.00</td></tr><tr><td rowspan="1" colspan="1"><bold>Age group</bold></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td rowspan="1" colspan="1"> 16–30</td><td rowspan="1" colspan="1">1</td><td rowspan="1" colspan="1">11</td><td rowspan="1" colspan="1">1.00</td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1">1.00</td><td rowspan="1" colspan="1"></td></tr><tr><td rowspan="1" colspan="1"> 31–60</td><td rowspan="1" colspan="1">7</td><td rowspan="1" colspan="1">56</td><td rowspan="1" colspan="1">1.3[1.1–12.3]</td><td rowspan="1" colspan="1">0.091</td><td rowspan="1" colspan="1">1.3[1.1–12.2]<sup>b</sup></td><td rowspan="1" colspan="1">0.029</td></tr><tr><td rowspan="1" colspan="1"> 61 and upper</td><td rowspan="1" colspan="1">10</td><td rowspan="1" colspan="1">22</td><td rowspan="1" colspan="1">5.0[1.4–7.2]</td><td rowspan="1" colspan="1">4.9[1.5–8.4]</td></tr><tr><td rowspan="1" colspan="1"><bold>Comorbidity</bold></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td rowspan="1" colspan="1"> Yes</td><td rowspan="1" colspan="1">15</td><td rowspan="1" colspan="1">49</td><td rowspan="1" colspan="1">4.0[1.1–15.0]</td><td rowspan="1" colspan="1">0.035</td><td rowspan="1" colspan="1">4.0[1.9–16.3]<sup>c</sup></td><td rowspan="1" colspan="1">0.039</td></tr><tr><td rowspan="1" colspan="1"> No</td><td rowspan="1" colspan="1">3</td><td rowspan="1" colspan="1">40</td><td rowspan="1" colspan="1">1.00</td><td rowspan="1" colspan="1">1.00</td></tr><tr><td rowspan="1" colspan="1"><bold>Nationality</bold></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td rowspan="1" colspan="1"> Others</td><td rowspan="1" colspan="1">4</td><td rowspan="1" colspan="1">9</td><td rowspan="1" colspan="1">1.00</td><td rowspan="1" colspan="1">0.042</td><td rowspan="1" colspan="1">1.00</td><td rowspan="1" colspan="1">0.012</td></tr><tr><td rowspan="1" colspan="1"> Saudi</td><td rowspan="1" colspan="1">14</td><td rowspan="1" colspan="1">80</td><td rowspan="1" colspan="1">2.5 [1.6–9.3]</td><td rowspan="1" colspan="1">4.2[1.3–11.4]<sup>d</sup></td></tr><tr><td rowspan="1" colspan="1"><bold>Exposure to camels</bold></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td rowspan="1" colspan="1"> Yes</td><td rowspan="1" colspan="1">11</td><td rowspan="1" colspan="1">42</td><td rowspan="1" colspan="1">1.7[1.6–4.9]</td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1">1.05[1.1–3.3]<sup>e</sup></td><td rowspan="1" colspan="1">0.015</td></tr><tr><td rowspan="1" colspan="1"> No</td><td rowspan="1" colspan="1">7</td><td rowspan="1" colspan="1">47</td><td rowspan="1" colspan="1">1.00</td><td rowspan="1" colspan="1">1.00</td></tr><tr><td rowspan="1" colspan="1"><bold>Camel milk consumption</bold></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td rowspan="1" colspan="1"> Yes</td><td rowspan="1" colspan="1">11</td><td rowspan="1" colspan="1">43</td><td rowspan="1" colspan="1">1.6[1.5–4.7]</td><td rowspan="1" colspan="1">0.021</td><td rowspan="1" colspan="1">1.05[1.2–2.8]<sup>f</sup></td><td rowspan="1" colspan="1">0.004</td></tr><tr><td rowspan="1" colspan="1"> No</td><td rowspan="1" colspan="1">7</td><td rowspan="1" colspan="1">46</td><td rowspan="1" colspan="1">1.00</td><td rowspan="1" colspan="1">1.00</td></tr><tr><td rowspan="1" colspan="1"><bold>Exposure to MERS-CoV cases</bold></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td rowspan="1" colspan="1"> Yes</td><td rowspan="1" colspan="1">11</td><td rowspan="1" colspan="1">57</td><td rowspan="1" colspan="1">1.8[1.3–2.5]</td><td rowspan="1" colspan="1">0.002</td><td rowspan="1" colspan="1">1.06[1.2–2.0]<sup>j</sup></td><td rowspan="1" colspan="1">0.008</td></tr><tr><td rowspan="1" colspan="1"> No</td><td rowspan="1" colspan="1">7</td><td rowspan="1" colspan="1">32</td><td rowspan="1" colspan="1">1.00</td><td rowspan="1" colspan="1">1.00</td></tr><tr><td rowspan="1" colspan="1"><bold>Health care worker</bold></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td rowspan="1" colspan="1"> Yes</td><td rowspan="1" colspan="1">17</td><td rowspan="1" colspan="1">74</td><td rowspan="1" colspan="1">3.44[1.4–7.9]</td><td rowspan="1" colspan="1">0.009</td><td rowspan="1" colspan="1">2. 4[1.2–3.1]<sup>h</sup></td><td rowspan="1" colspan="1">0.006</td></tr><tr><td rowspan="1" colspan="1"> No</td><td rowspan="1" colspan="1">1</td><td rowspan="1" colspan="1">15</td><td rowspan="1" colspan="1">1.00</td><td rowspan="1" colspan="1">1.00</td></tr></tbody></table><table-wrap-foot><fn><p><bold>Note:</bold><sup>a</sup>Adjusted for age; <sup>b,c</sup>adjusted for sex; <sup>d,e,f,h</sup>adjusted for age and sex.</p></fn></table-wrap-foot></table-wrap></p><p>Epidemic curve of MERS-CoV human cases from the 1st of January 2019 until 31st of the March 2019 (per WHO data) and also the distributional status of these cases by involved county and city are shown in <xref rid="F0001" ref-type="fig">Figures 1</xref> and <xref rid="F0002" ref-type="fig">2</xref>.<fig id="F0001" fig-type="figure" orientation="portrait" position="float"><label>Figure 1</label><caption><p>Epidemic curve of MERS-CoV human cases from the 1st of January 2019 until 31st of March 2019 (as per WHO data).</p></caption><graphic content-type="print-only" xlink:href="IJGM-12-305-g0001"></graphic></fig><fig id="F0002" fig-type="figure" orientation="portrait" position="float"><label>Figure 2</label><caption><p>The distribution of MERS-CoV human cases involved by county and city from the 1st of January 2019 until 31st of March 2019.</p></caption><graphic content-type="print-only" xlink:href="IJGM-12-305-g0002"></graphic></fig></p></sec><sec id="S0004"><title>Discussion</title><p>MERS-CoV infection is considered as an emerging disease with pandemic potential originating from Saudi Arabia, where millions of pilgrims are gathered for holding the Hajj (the largest religious mass gathering takes place by Moslems every year).<xref rid="CIT0009" ref-type="bibr">9</xref> The results showed that with no substantial epidemic change, after 8 years from the onset of MERS-CoV outbreak and despite significant improvements in surveillance for MERS infection, especially in the Middle East, still cases of this infection are reporting to the WHO from some countries, such as Saudi Arabia and Oman in the first three months of 2019 (<xref rid="T0001" ref-type="table">Table 1</xref>). The continued occurrence of MERS cases is deeply concerning. In response to the existence of challenges and problems, this probably reflects the concern to suspect the clusters in MERS outbreak prevention and control measures. The authors in this study strongly recommend that challenges of running programs against MERS-CoV infection identified by separate operational research in affected and at-risk countries.</p><p>According to the data in <xref rid="T0001" ref-type="table">Table 1</xref>, the estimated overall CFR was 16.8% for all known case patients with MERS in involved countries in the first three months of 2019. The CFR accounted for 30–63% in Saudi Arabia<xref rid="CIT0010" ref-type="bibr">10</xref>–<xref rid="CIT0012" ref-type="bibr">12</xref> and 20–63% in South Korea.<xref rid="CIT0013" ref-type="bibr">13</xref>,<xref rid="CIT0014" ref-type="bibr">14</xref> This varies in CFR from one region to another in several previously conducted studies probably is likely related to the pattern of the disease as we see only the tip of the iceberg of critically ill and admitted patients and also it might depend on the number of sample size that has been investigated by authors of all previously published studies.</p><p>The results of this study showed (<xref rid="T0002" ref-type="table">Table 2</xref>) a statistically significant difference in the time from onset of symptoms to the death between males (19.7±12.1 day) and females (11.1±8.1 day), (<italic>p</italic>=0.037). Although the reason for this difference is not clear, the reasons for this difference can be the physiological and physical differences between males and females. Furman et al in 2014 in their study suggested that there is also a higher incidence of influenza in men in comparisons to women, which is due to a higher level of testosterone and corresponding suppression of their immune response.<xref rid="CIT0015" ref-type="bibr">15</xref> The authors of the study suggested that this issue be separately investigated in further study.</p><p>Several studies<xref rid="CIT0009" ref-type="bibr">9</xref>,<xref rid="CIT0011" ref-type="bibr">11</xref>,<xref rid="CIT0016" ref-type="bibr">16</xref>–<xref rid="CIT0019" ref-type="bibr">19</xref> including the current study (<xref rid="T0003" ref-type="table">Table 3</xref>, suggest that the male gender; health care worker; MERS patients above the age of 60 with an underlying medical conditions, such as hypertension, diabetes and renal failure; those who had exposure to camels and camel milk consumption; and close contact with MERS-CoV cases had a significantly higher risk of severe disease, including death. These findings should be considered by policymakers and health care system in triage and prevention and disease management strategies to reduce the mortality rate related to MERS-CoV infections in MERS patients and also to properly develop a support care plan to improve patients’ outcomes.</p><p>The number of reported cases of MERS-CoV increased remarkably between 1st and 13th of February 2019 (61.6%) (<xref rid="F0001" ref-type="fig">Figure 1</xref>). Saudi Arabia with 87.8% and Oman with 12.1% of MERS cases are remaining countries in the world that are still affected by this emerging infection. Most of the cases reported in Saudi Arabia were from Riyadh (71.9%) and in Oman 8.4% from North Al-Batinah (<xref rid="F0002" ref-type="fig">Figure 2</xref>). The large proportion of reported cases from this mentioned region highlights the importance of implementation of infection control practices to limit transmission in there. The results of this study are in line with the previous published epidemiological studies,<xref rid="CIT0020" ref-type="bibr">20</xref>–<xref rid="CIT0022" ref-type="bibr">22</xref> those which declared that Saudi Arabia had been the epicenter of MERS-CoV infection, and during the 8 years from the onset of this disease, this country had always ranked first in aspect of the number of MERS cases and deaths related to MERS-CoV infection with >80% of global MERS-CoV burden among all the affected countries worldwide.</p><p>Some limitations were recognized in this study. The design of this survey was cross-sectional so that no causal inferences could be made because the evaluation of the temporal relationship between exposure and outcome is limited in such designs. The sample size in this study is low; therefore, there is a probability of a random error occurrence in the results. Possible misclassification in the categorization of MERS cases may be due to the respondents, declaration for example in exposure to camels, camel milk consumption, exposure to MERS-CoV cases, and comorbidity which potentially may occur as a result of the measurement bias. Despite the above limitations, the current global survey may have a number of implications for health care policy by using global data.</p></sec><sec id="S0005"><title>Conclusion</title><p>In summary, this information could be important to identify the underlying condition associated with death in MERS-CoV patients. The continuous occurrence of MERS-CoV cases after 8 years from the passes of the disease is critical to a global public health response. Since our knowledge about the epidemiology of MERS-CoV is increasing, there is the need for educational programs, access to the health care setting and early detection of morbid cases with MERS-CoV. By considering the results in the present study, policymakers and local health authorities of the affected countries can modify potential risk factors to reduce the higher mortality rates in MERS patients and also to prevent, respond to and control outbreaks of MERS-CoV.</p></sec></body><back><ack><title>Acknowledgments</title><p>The authors take this opportunity to thank all the WHO personnel as well as reporting countries with confirmed MERS cases for data collection and sending the data to WHO. The authors would like to acknowledge Ms. Gazhal Akhavan Masoumi for editing this paper. 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