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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Ribavirin and interferon therapy in patients infected with the Middle East respiratory syndrome coronavirus: an observational study</title>
<author><name sortKey="Al Tawfiq, Jaffar A" sort="Al Tawfiq, Jaffar A" uniqKey="Al Tawfiq J" first="Jaffar A." last="Al-Tawfiq">Jaffar A. Al-Tawfiq</name>
<affiliation><nlm:aff id="aff0005">Internal Medicine, Saudi Aramco Medical Services Organization, PO Box 76, Room A-428-2, Building 61, Dhahran Health Center, Dhahran 31311, Saudi Arabia</nlm:aff>
</affiliation>
<affiliation><nlm:aff id="aff0010">Indiana University School of Medicine, Indiana, USA</nlm:aff>
</affiliation>
</author>
<author><name sortKey="Momattin, Hisham" sort="Momattin, Hisham" uniqKey="Momattin H" first="Hisham" last="Momattin">Hisham Momattin</name>
<affiliation><nlm:aff id="aff0015">Pharmacy Services Division, Saudi Aramco Medical Services Organization, Dhahran, Saudi Arabia</nlm:aff>
</affiliation>
</author>
<author><name sortKey="Dib, Jean" sort="Dib, Jean" uniqKey="Dib J" first="Jean" last="Dib">Jean Dib</name>
<affiliation><nlm:aff id="aff0015">Pharmacy Services Division, Saudi Aramco Medical Services Organization, Dhahran, Saudi Arabia</nlm:aff>
</affiliation>
</author>
<author><name sortKey="Memish, Ziad A" sort="Memish, Ziad A" uniqKey="Memish Z" first="Ziad A." last="Memish">Ziad A. Memish</name>
<affiliation><nlm:aff id="aff0020">WHO Collaborating Center for Mass Gathering Medicine, Ministry of Health, Riyadh, Saudi Arabia</nlm:aff>
</affiliation>
<affiliation><nlm:aff id="aff0025">Al-Faisal University, Riyadh, Saudi Arabia</nlm:aff>
</affiliation>
</author>
</titleStmt>
<publicationStmt><idno type="wicri:source">PMC</idno>
<idno type="pmid">24406736</idno>
<idno type="pmc">7110882</idno>
<idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7110882</idno>
<idno type="RBID">PMC:7110882</idno>
<idno type="doi">10.1016/j.ijid.2013.12.003</idno>
<date when="2014">2014</date>
<idno type="wicri:Area/Pmc/Corpus">000D62</idno>
<idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">000D62</idno>
</publicationStmt>
<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Ribavirin and interferon therapy in patients infected with the Middle East respiratory syndrome coronavirus: an observational study</title>
<author><name sortKey="Al Tawfiq, Jaffar A" sort="Al Tawfiq, Jaffar A" uniqKey="Al Tawfiq J" first="Jaffar A." last="Al-Tawfiq">Jaffar A. Al-Tawfiq</name>
<affiliation><nlm:aff id="aff0005">Internal Medicine, Saudi Aramco Medical Services Organization, PO Box 76, Room A-428-2, Building 61, Dhahran Health Center, Dhahran 31311, Saudi Arabia</nlm:aff>
</affiliation>
<affiliation><nlm:aff id="aff0010">Indiana University School of Medicine, Indiana, USA</nlm:aff>
</affiliation>
</author>
<author><name sortKey="Momattin, Hisham" sort="Momattin, Hisham" uniqKey="Momattin H" first="Hisham" last="Momattin">Hisham Momattin</name>
<affiliation><nlm:aff id="aff0015">Pharmacy Services Division, Saudi Aramco Medical Services Organization, Dhahran, Saudi Arabia</nlm:aff>
</affiliation>
</author>
<author><name sortKey="Dib, Jean" sort="Dib, Jean" uniqKey="Dib J" first="Jean" last="Dib">Jean Dib</name>
<affiliation><nlm:aff id="aff0015">Pharmacy Services Division, Saudi Aramco Medical Services Organization, Dhahran, Saudi Arabia</nlm:aff>
</affiliation>
</author>
<author><name sortKey="Memish, Ziad A" sort="Memish, Ziad A" uniqKey="Memish Z" first="Ziad A." last="Memish">Ziad A. Memish</name>
<affiliation><nlm:aff id="aff0020">WHO Collaborating Center for Mass Gathering Medicine, Ministry of Health, Riyadh, Saudi Arabia</nlm:aff>
</affiliation>
<affiliation><nlm:aff id="aff0025">Al-Faisal University, Riyadh, Saudi Arabia</nlm:aff>
</affiliation>
</author>
</analytic>
<series><title level="j">International Journal of Infectious Diseases</title>
<idno type="ISSN">1201-9712</idno>
<idno type="eISSN">1878-3511</idno>
<imprint><date when="2014">2014</date>
</imprint>
</series>
</biblStruct>
</sourceDesc>
</fileDesc>
<profileDesc><textClass></textClass>
</profileDesc>
</teiHeader>
<front><div type="abstract" xml:lang="en"><title>Summary</title>
<sec><title>Background</title>
<p>The Middle East respiratory syndrome coronavirus (MERS-CoV) has been reported to have a high case-fatality rate. Currently, there is no specific therapy or vaccine with proven effectiveness for MERS-CoV infections.</p>
</sec>
<sec><title>Methods</title>
<p>A combination of ribavirin and interferon therapy was used for the treatment of five MERS-CoV-positive patients. We reviewed the therapeutic schedule and the outcome of these patients.</p>
</sec>
<sec><title>Results</title>
<p>All patients were critically ill with acute respiratory distress syndrome treated with adjunctive corticosteroids and were on mechanical ventilation at the time of initiation of therapy. The median time from admission to therapy with ribavirin and interferon was 19 (range 10–22) days. None of the patients responded to the supportive or therapeutic interventions and all died of their illness.</p>
</sec>
<sec><title>Conclusions</title>
<p>While ribavirin and interferon may be effective in some patients, our practical experience suggests that critically ill patients with multiple comorbidities who are diagnosed late in the course of their illness may not benefit from combination antiviral therapy as preclinical data suggest. There is clearly an urgent need for a novel effective antiviral therapy for this emerging global threat.</p>
</sec>
</div>
</front>
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</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 Infect Dis</journal-id>
<journal-id journal-id-type="iso-abbrev">Int. J. Infect. Dis</journal-id>
<journal-title-group><journal-title>International Journal of Infectious Diseases</journal-title>
</journal-title-group>
<issn pub-type="ppub">1201-9712</issn>
<issn pub-type="epub">1878-3511</issn>
<publisher><publisher-name>The Authors. Published by Elsevier Ltd.</publisher-name>
</publisher>
</journal-meta>
<article-meta><article-id pub-id-type="pmid">24406736</article-id>
<article-id pub-id-type="pmc">7110882</article-id>
<article-id pub-id-type="publisher-id">S1201-9712(13)00376-7</article-id>
<article-id pub-id-type="doi">10.1016/j.ijid.2013.12.003</article-id>
<article-categories><subj-group subj-group-type="heading"><subject>Article</subject>
</subj-group>
</article-categories>
<title-group><article-title>Ribavirin and interferon therapy in patients infected with the Middle East respiratory syndrome coronavirus: an observational study</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" id="aut0005"><name><surname>Al-Tawfiq</surname>
<given-names>Jaffar A.</given-names>
</name>
<email>jaffar.tawfiq@aramco.com</email>
<email>jaltawfi@yahoo.com</email>
<xref rid="aff0005" ref-type="aff">a</xref>
<xref rid="aff0010" ref-type="aff">b</xref>
<xref rid="cor0005" ref-type="corresp">⁎</xref>
</contrib>
<contrib contrib-type="author" id="aut0010"><name><surname>Momattin</surname>
<given-names>Hisham</given-names>
</name>
<xref rid="aff0015" ref-type="aff">c</xref>
</contrib>
<contrib contrib-type="author" id="aut0015"><name><surname>Dib</surname>
<given-names>Jean</given-names>
</name>
<xref rid="aff0015" ref-type="aff">c</xref>
</contrib>
<contrib contrib-type="author" id="aut0020"><name><surname>Memish</surname>
<given-names>Ziad A.</given-names>
</name>
<xref rid="aff0020" ref-type="aff">d</xref>
<xref rid="aff0025" ref-type="aff">e</xref>
</contrib>
</contrib-group>
<aff id="aff0005"><label>a</label>
Internal Medicine, Saudi Aramco Medical Services Organization, PO Box 76, Room A-428-2, Building 61, Dhahran Health Center, Dhahran 31311, Saudi Arabia</aff>
<aff id="aff0010"><label>b</label>
Indiana University School of Medicine, Indiana, USA</aff>
<aff id="aff0015"><label>c</label>
Pharmacy Services Division, Saudi Aramco Medical Services Organization, Dhahran, Saudi Arabia</aff>
<aff id="aff0020"><label>d</label>
WHO Collaborating Center for Mass Gathering Medicine, Ministry of Health, Riyadh, Saudi Arabia</aff>
<aff id="aff0025"><label>e</label>
Al-Faisal University, Riyadh, Saudi Arabia</aff>
<author-notes><corresp id="cor0005"><label>⁎</label>
Corresponding author. Tel.: +966 13 877 3524; fax: +966 13 877 3790. <email>jaffar.tawfiq@aramco.com</email>
<email>jaltawfi@yahoo.com</email>
</corresp>
</author-notes>
<pub-date pub-type="pmc-release"><day>6</day>
<month>1</month>
<year>2014</year>
</pub-date>
<pmc-comment> PMC Release delay is 0 months and 0 days and was based on .</pmc-comment>
<pub-date pub-type="ppub"><month>3</month>
<year>2014</year>
</pub-date>
<pub-date pub-type="epub"><day>6</day>
<month>1</month>
<year>2014</year>
</pub-date>
<volume>20</volume>
<fpage>42</fpage>
<lpage>46</lpage>
<history><date date-type="received"><day>9</day>
<month>12</month>
<year>2013</year>
</date>
<date date-type="accepted"><day>9</day>
<month>12</month>
<year>2013</year>
</date>
</history>
<permissions><copyright-statement>© 2014 The Authors</copyright-statement>
<copyright-year>2014</copyright-year>
<license><license-p>Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.</license-p>
</license>
</permissions>
<abstract id="abs0005"><title>Summary</title>
<sec><title>Background</title>
<p>The Middle East respiratory syndrome coronavirus (MERS-CoV) has been reported to have a high case-fatality rate. Currently, there is no specific therapy or vaccine with proven effectiveness for MERS-CoV infections.</p>
</sec>
<sec><title>Methods</title>
<p>A combination of ribavirin and interferon therapy was used for the treatment of five MERS-CoV-positive patients. We reviewed the therapeutic schedule and the outcome of these patients.</p>
</sec>
<sec><title>Results</title>
<p>All patients were critically ill with acute respiratory distress syndrome treated with adjunctive corticosteroids and were on mechanical ventilation at the time of initiation of therapy. The median time from admission to therapy with ribavirin and interferon was 19 (range 10–22) days. None of the patients responded to the supportive or therapeutic interventions and all died of their illness.</p>
</sec>
<sec><title>Conclusions</title>
<p>While ribavirin and interferon may be effective in some patients, our practical experience suggests that critically ill patients with multiple comorbidities who are diagnosed late in the course of their illness may not benefit from combination antiviral therapy as preclinical data suggest. There is clearly an urgent need for a novel effective antiviral therapy for this emerging global threat.</p>
</sec>
</abstract>
<kwd-group id="kwd0005"><title>Keywords</title>
<kwd>MERS-CoV</kwd>
<kwd>Interferon</kwd>
<kwd>Ribavirin</kwd>
<kwd>Pegylated interferon</kwd>
</kwd-group>
</article-meta>
<notes><p id="misc0005"><bold>Corresponding Editor:</bold>
Eskild Petersen, Aarhus, Denmark</p>
</notes>
</front>
<body><sec id="sec0005"><label>1</label>
<title>Introduction</title>
<p id="par0005">Since the discovery of Middle East respiratory syndrome coronavirus (MERS-CoV), the virus has caused 163 cases of disease, with a fatality rate of 43–50%.<xref rid="bib0005" ref-type="bibr">1</xref>
, <xref rid="bib0115" ref-type="bibr">2</xref>
The disease was initially described in a patient from Saudi Arabia in June 2012.<xref rid="bib0015" ref-type="bibr"><sup>3</sup>
</xref>
MERS-CoV has caused sporadic cases and clusters in families and healthcare settings.<xref rid="bib0020" ref-type="bibr">4</xref>
, <xref rid="bib0025" ref-type="bibr">5</xref>
, <xref rid="bib0030" ref-type="bibr">6</xref>
, <xref rid="bib0035" ref-type="bibr">7</xref>
The best treatment option for the virus is not known. In view of the high case-fatality rate and the potential global spread of the virus, there is an urgent need to develop effective therapies for this infection. In a recent review, based on therapies used for the related severe acute respiratory syndrome (SARS) coronavirus, the possible use of interferon and ribavirin was considered as a therapeutic option.<xref rid="bib0040" ref-type="bibr"><sup>8</sup>
</xref>
The purpose of this study was to describe the outcome of the use of a combination of interferon-α2b and ribavirin in the management of five patients with MERS-CoV infections.</p>
</sec>
<sec id="sec0010"><label>2</label>
<title>Materials and methods</title>
<p id="par0010">This was a retrospective observational study of five MERS-CoV-positive patients who received a combination therapy of interferon-α2b and ribavirin. We describe the therapeutic schedule, the clinical course, clinical and laboratory parameters, and outcomes.</p>
<sec id="sec0015"><label>2.1</label>
<title>MERS-CoV testing</title>
<p id="par0015">Either Dacron flocked nasopharyngeal swabs or tracheal aspirates were obtained from the patients, and these were submitted to the Ministry of Health MERS-CoV laboratory for MERS-CoV diagnosis. The clinical samples were screened at the Ministry of Health laboratory using a real-time reverse transcriptase PCR.<xref rid="bib0045" ref-type="bibr">9</xref>
, <xref rid="bib0050" ref-type="bibr">10</xref>
Amplification targeted both the upstream E protein (<italic>upE</italic>
gene) and open reading frame 1a (ORF1a) for MERS-CoV testing, and a case was considered positive if both assays were positive, as described previously (<xref rid="fig0005" ref-type="fig">Fig. 1</xref>
).<xref rid="bib0025" ref-type="bibr"><sup>5</sup>
</xref>
<fig id="fig0005"><label>Figure 1</label>
<caption><p>Median, minimum, and maximum values for amylase, lipase, and lactate dehydrogenase (LDH).</p>
</caption>
<graphic xlink:href="gr1_lrg"></graphic>
</fig>
</p>
</sec>
</sec>
<sec id="sec0020"><label>3</label>
<title>Case reports</title>
<sec id="sec0025"><label>3.1</label>
<title>Case 1</title>
<p id="par0020">A 62-year-old woman with diabetes, hypertension, and end-stage renal disease (ESRD) on hemodialysis was admitted with fever, cough, and respiratory failure of 3-day duration (<xref rid="tbl0005" ref-type="table">table 1</xref>
). She tested positive for MERS-CoV by PCR. Baseline laboratory data are shown in <xref rid="tbl0010" ref-type="table">Table 2</xref>
, <xref rid="tbl0015" ref-type="table">Table 3</xref>
. On admission, the patient was started on oseltamivir 75 mg once daily for 5 days and levofloxacin 500 mg intravenous (IV) every 2 days for 15 days. Imipenem was added on day 5 for 3 days. On day 21 after admission, she was started on ribavirin for 5 days with a loading dose of 2000 mg via nasogastric tube, followed by 400 mg per os (PO) every 8 h, one dose of interferon-α2b 130 μg subcutaneously, and methylprednisolone 40 mg IV every 8 h for 1 day, then twice daily for 1 day, then daily for 2 days. She had a mild rise in amylase and lipase (from 61 to 126 U/l and from 274 to 348 U/l, respectively). The patient remained critically ill on mechanical ventilation requiring inotropic support. She died 34 days after admission from respiratory and multi-organ failure.<table-wrap position="float" id="tbl0005"><label>Table 1</label>
<caption><p>Patient demographics and underlying conditions</p>
</caption>
<table frame="hsides" rules="groups"><thead><tr><th align="left">Case No.</th>
<th align="left">Age, years</th>
<th align="left">Gender</th>
<th align="left">Body weight, kg</th>
<th align="left">Hypertension</th>
<th align="left">Diabetes mellitus</th>
<th align="left">Chronic renal disease</th>
<th align="left">ClCr, ml/min</th>
<th align="left">Dialysis</th>
<th align="left">Other chronic conditions</th>
</tr>
</thead>
<tbody><tr><td align="left">1</td>
<td align="char">62</td>
<td align="left">F</td>
<td align="char">78</td>
<td align="left">Yes</td>
<td align="left">Yes</td>
<td align="left">Yes</td>
<td align="char">8.5</td>
<td align="left">HD</td>
<td align="left">No</td>
</tr>
<tr><td align="left">2</td>
<td align="char">58</td>
<td align="left">M</td>
<td align="char">52</td>
<td align="left">Yes</td>
<td align="left">Yes</td>
<td align="left">Yes</td>
<td align="char">15.8</td>
<td align="left">HD</td>
<td align="left">No</td>
</tr>
<tr><td align="left">3</td>
<td align="char">63</td>
<td align="left">F</td>
<td align="char">96</td>
<td align="left">Yes</td>
<td align="left">Yes</td>
<td align="left">Yes</td>
<td align="char">15.7</td>
<td align="left">No</td>
<td align="left">Asthma, obstructive sleep apnea, coronary artery disease</td>
</tr>
<tr><td align="left">4</td>
<td align="char">81</td>
<td align="left">M</td>
<td align="char">71</td>
<td align="left">Yes</td>
<td align="left">Yes</td>
<td align="left">Yes</td>
<td align="char">40.7</td>
<td align="left">HD</td>
<td align="left">Atrial fibrillation</td>
</tr>
<tr><td align="left">5</td>
<td align="char">24</td>
<td align="left">M</td>
<td align="char">58</td>
<td align="left">No</td>
<td align="left">No</td>
<td align="left">Yes</td>
<td align="char">12.8</td>
<td align="left">HD</td>
<td align="left">End-stage renal disease</td>
</tr>
</tbody>
</table>
<table-wrap-foot><fn><p>ClCr, creatinine clearance; F, female; M, male; HD, hemodialysis.</p>
</fn>
</table-wrap-foot>
</table-wrap>
<table-wrap position="float" id="tbl0010"><label>Table 2</label>
<caption><p>Laboratory results of patients at baseline and at 1 and 2 weeks after the initiation of interferon and ribavirin therapy</p>
</caption>
<table frame="hsides" rules="groups"><thead><tr><th></th>
<th></th>
<th align="left">Case 1</th>
<th align="left">Case 2</th>
<th align="left">Case 3</th>
<th align="left">Case 4</th>
<th align="left">Case 5</th>
</tr>
</thead>
<tbody><tr><td align="left">Serum creatinine, mg/dl</td>
<td align="left">Baseline</td>
<td align="char">5.8</td>
<td align="char">4.9</td>
<td align="char">0.6</td>
<td align="char">0.7</td>
<td align="char">4.5</td>
</tr>
<tr><td></td>
<td align="left">Week 1</td>
<td align="char">3.9</td>
<td align="char">5.4</td>
<td align="char">2.9</td>
<td align="char">0.7</td>
<td align="char">3.5</td>
</tr>
<tr><td></td>
<td align="left">Week 2</td>
<td align="char">5.7</td>
<td align="char">3.8</td>
<td></td>
<td align="char">1.7</td>
<td align="char">7.3</td>
</tr>
<tr><td></td>
<td align="left">Week 3</td>
<td></td>
<td></td>
<td></td>
<td align="char">0.7</td>
<td></td>
</tr>
<tr><td align="left">Platelet count, × 10<sup>9</sup>
/l</td>
<td align="left">Baseline</td>
<td align="char">290</td>
<td align="char">408</td>
<td align="char">272</td>
<td align="char">74</td>
<td align="char">194</td>
</tr>
<tr><td></td>
<td align="left">Week 1</td>
<td align="char">166</td>
<td align="char">239</td>
<td align="char">408</td>
<td align="char">163</td>
<td align="char">160</td>
</tr>
<tr><td></td>
<td align="left">Week 2</td>
<td align="char">233</td>
<td align="char">43</td>
<td></td>
<td align="char">106</td>
<td align="char">234</td>
</tr>
<tr><td></td>
<td align="left">Week 3</td>
<td></td>
<td></td>
<td></td>
<td align="char">85</td>
<td></td>
</tr>
<tr><td align="left">Hemoglobin, g/dl</td>
<td align="left">Baseline</td>
<td align="char">11.3</td>
<td align="char">9.3</td>
<td align="char">10.5</td>
<td align="char">11.7</td>
<td align="char">8.4</td>
</tr>
<tr><td></td>
<td align="left">Week 1</td>
<td align="char">9.3</td>
<td align="char">10.2</td>
<td align="char">10.7</td>
<td align="char">10</td>
<td align="char">8.1</td>
</tr>
<tr><td></td>
<td align="left">Week 2</td>
<td align="char">9.4</td>
<td align="char">9.1</td>
<td></td>
<td align="char">9.1</td>
<td align="char">8.7</td>
</tr>
<tr><td></td>
<td align="left">Week 3</td>
<td></td>
<td></td>
<td></td>
<td align="char">8.7</td>
<td></td>
</tr>
<tr><td align="left">WBC count, × 10<sup><bold>9</bold>
</sup>
/l</td>
<td align="left">Baseline</td>
<td align="char">12.9</td>
<td align="char">5.5</td>
<td align="char">6.3</td>
<td align="char">9.5</td>
<td align="char">32.1</td>
</tr>
<tr><td></td>
<td align="left">Week 1</td>
<td align="char">7.2</td>
<td align="char">4.3</td>
<td align="char">20</td>
<td align="char">10.7</td>
<td align="char">15.5</td>
</tr>
<tr><td></td>
<td align="left">Week 2</td>
<td align="char">25.5</td>
<td align="char">2.7</td>
<td></td>
<td align="char">5.1</td>
<td align="char">28.6</td>
</tr>
<tr><td></td>
<td align="left">Week 3</td>
<td></td>
<td></td>
<td></td>
<td align="char">4.7</td>
<td></td>
</tr>
<tr><td align="left">Lymphocytes (%)</td>
<td align="left">Baseline</td>
<td align="char">13</td>
<td align="char">17</td>
<td align="char">8</td>
<td align="char">8</td>
<td align="char">4</td>
</tr>
<tr><td></td>
<td align="left">Week 1</td>
<td align="char">17</td>
<td align="char">18</td>
<td align="char">2</td>
<td align="char">2</td>
<td align="char">19</td>
</tr>
<tr><td></td>
<td align="left">Week 2</td>
<td align="char">3</td>
<td align="char">62</td>
<td></td>
<td align="char">3</td>
<td align="char">4</td>
</tr>
<tr><td></td>
<td align="left">Week 3</td>
<td></td>
<td></td>
<td></td>
<td align="char">13</td>
<td></td>
</tr>
</tbody>
</table>
</table-wrap>
<table-wrap position="float" id="tbl0015"><label>Table 3</label>
<caption><p>Hepatic and pancreatic enzymes of patients at baseline and at 1 and 2 weeks after the initiation of interferon and ribavirin therapy</p>
</caption>
<table frame="hsides" rules="groups"><thead><tr><th></th>
<th colspan="5" align="left">Liver function test<xref rid="tblfn0005" ref-type="table-fn">a</xref>
<hr></hr>
</th>
<th colspan="4" align="left">Pancreatic enzymes<xref rid="tblfn0010" ref-type="table-fn">b</xref>
<hr></hr>
</th>
</tr>
<tr><th></th>
<th align="left">Test</th>
<th align="left">Baseline</th>
<th align="left">Week 1</th>
<th align="left">Week 2</th>
<th align="left">Week 3</th>
<th align="left">Test</th>
<th align="left">Baseline</th>
<th align="left">Week 1</th>
<th align="left">Week 2</th>
</tr>
</thead>
<tbody><tr><td align="left">Case 1</td>
<td align="left">ALP</td>
<td align="char">123</td>
<td align="char">62</td>
<td align="char">119</td>
<td></td>
<td align="left">Amylase</td>
<td align="char">61</td>
<td align="char">105</td>
<td align="char">126</td>
</tr>
<tr><td></td>
<td align="left">ALT</td>
<td align="char">15</td>
<td align="char">24</td>
<td align="char">22</td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr><td></td>
<td align="left">AST</td>
<td align="char">20</td>
<td align="char">27</td>
<td align="char">34</td>
<td></td>
<td align="left">Lipase</td>
<td align="char">274</td>
<td align="char">380</td>
<td align="char">348</td>
</tr>
<tr><td></td>
<td align="left">LDH</td>
<td align="char">677</td>
<td align="char">543</td>
<td align="char">936</td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr><td></td>
<td align="left">Total bilirubin</td>
<td align="char">1</td>
<td align="char">0.7</td>
<td align="char">0.8</td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr><td align="left">Case 2</td>
<td align="left">ALP</td>
<td align="char">93</td>
<td align="char">75</td>
<td></td>
<td></td>
<td align="left">Amylase</td>
<td align="char"><30</td>
<td align="char">45</td>
<td></td>
</tr>
<tr><td></td>
<td align="left">ALT</td>
<td align="char">32</td>
<td align="char">17</td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr><td></td>
<td align="left">AST</td>
<td align="char">27</td>
<td align="char">10</td>
<td></td>
<td></td>
<td align="left">Lipase</td>
<td align="char">26</td>
<td align="char">152</td>
<td></td>
</tr>
<tr><td></td>
<td align="left">LDH</td>
<td align="char">593</td>
<td align="char">543</td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr><td></td>
<td align="left">Total bilirubin</td>
<td align="char">0.7</td>
<td align="char">1.5</td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr><td align="left">Case 3</td>
<td align="left">ALP</td>
<td align="char">41</td>
<td align="char">74</td>
<td></td>
<td></td>
<td align="left">Amylase</td>
<td align="char">35</td>
<td align="char">255</td>
<td></td>
</tr>
<tr><td></td>
<td align="left">ALT</td>
<td align="char">22</td>
<td align="char">49</td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr><td></td>
<td align="left">AST</td>
<td align="char">25</td>
<td align="char">126</td>
<td></td>
<td></td>
<td align="left">Lipase</td>
<td align="char">55</td>
<td align="char">53</td>
<td></td>
</tr>
<tr><td></td>
<td align="left">LDH</td>
<td align="char">1102</td>
<td align="char">1389</td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr><td></td>
<td align="left">Total bilirubin</td>
<td align="char">0.6</td>
<td align="char">0.4</td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr><td align="left">Case 4</td>
<td align="left">ALP</td>
<td align="char">342</td>
<td align="char">293</td>
<td align="char">269</td>
<td align="char">548</td>
<td align="left">Amylase</td>
<td align="char">141</td>
<td align="char">148</td>
<td align="char">59</td>
</tr>
<tr><td></td>
<td align="left">ALT</td>
<td align="char">53</td>
<td align="char">41</td>
<td align="char">48</td>
<td align="char">68</td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr><td></td>
<td align="left">AST</td>
<td align="char">161</td>
<td align="char">79</td>
<td align="char">64</td>
<td align="char">125</td>
<td align="left">Lipase</td>
<td align="char">373</td>
<td align="char">492</td>
<td align="char">394</td>
</tr>
<tr><td></td>
<td align="left">LDH</td>
<td align="char">2342</td>
<td align="char">1875</td>
<td align="char">1214</td>
<td align="char">995</td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr><td></td>
<td align="left">Total bilirubin</td>
<td align="char">0.7</td>
<td align="char">1.2</td>
<td align="char">3.4</td>
<td align="char">7.4</td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr><td align="left">Case 5</td>
<td align="left">ALP</td>
<td align="char">230</td>
<td align="char">136</td>
<td align="char">101</td>
<td></td>
<td align="left">Amylase</td>
<td></td>
<td align="char">75</td>
<td align="char">96</td>
</tr>
<tr><td></td>
<td align="left">ALT</td>
<td align="char">83</td>
<td align="char">47</td>
<td align="char">17</td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr><td></td>
<td align="left">AST</td>
<td align="char">65</td>
<td align="char">14</td>
<td align="char">15</td>
<td></td>
<td align="left">Lipase</td>
<td></td>
<td align="char">561</td>
<td align="char">612</td>
</tr>
<tr><td></td>
<td align="left">LDH</td>
<td align="char">762</td>
<td align="char">384</td>
<td align="char">547</td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr><td></td>
<td align="left">Total bilirubin</td>
<td align="char">3.9</td>
<td align="char">1.1</td>
<td align="char">1.2</td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
</tbody>
</table>
<table-wrap-foot><fn><p>ALP, alkaline phosphatase; ALT, alanine aminotransferase; AST, aspartate aminotransferase; LDH, lactate dehydrogenase.</p>
</fn>
</table-wrap-foot>
<table-wrap-foot><fn id="tblfn0005"><label>a</label>
<p id="npar0005">ALP, U/L; ALT, IU/L; AST, IU/L; LDH, IU/L; bilirubin, mg/dl.</p>
</fn>
</table-wrap-foot>
<table-wrap-foot><fn id="tblfn0010"><label>b</label>
<p id="npar0010">Amylase, U/L; lipase, U/L</p>
</fn>
</table-wrap-foot>
</table-wrap>
</p>
</sec>
<sec id="sec0030"><label>3.2</label>
<title>Case 2</title>
<p id="par0025">A 58-year-old man with diabetes, hypertension, and ESRD on hemodialysis was admitted with cough, fever, and hypoxemic respiratory failure of 2-day duration. He tested positive for MERS-CoV by PCR. Baseline laboratory data are shown in <xref rid="tbl0010" ref-type="table">Table 2</xref>
, <xref rid="tbl0015" ref-type="table">Table 3</xref>
. On admission, the patient was started on oseltamivir 75 mg once daily for 5 days, levofloxacin 500 mg IV every 2 days for 6 days, and imipenem 250 mg IV twice daily for 7 days. On day 6, he was prescribed methylprednisolone 60 mg IV every 6 h for 6 days, then every 8 h for 1 day, then 40 mg every 12 h for 1 day, followed by a prednisolone tapered dose for another 10 days. On day 13 after admission, he was started on ribavirin for 5 days with a loading dose of 2000 mg PO, followed by 400 mg every 8 h and two doses of interferon-α2b 100 μg subcutaneously once per week. Two weeks after the initiation of the therapy, platelets dropped from 408 to 43 × 10<sup>9</sup>
/l (<xref rid="tbl0010" ref-type="table">Table 2</xref>
). The patient remained on the ventilator for more than 30 days. He died 35 days after admission from multi-organ failure.</p>
</sec>
<sec id="sec0035"><label>3.3</label>
<title>Case 3</title>
<p id="par0030">A 63-year-old woman with a history of severe bronchial asthma and obstructive sleep apnea (on continuous positive airway pressure (CPAP)), with coronary artery disease, diabetes, hypertension, and chronic kidney disease (estimated glomerular filtration rate 15.7 ml/min), was admitted with fever, cough, and dyspnea of 3-day duration and a diagnosis of pneumonia. She tested positive for MERS-CoV by PCR. Baseline laboratory data are shown in <xref rid="tbl0010" ref-type="table">Table 2</xref>
, <xref rid="tbl0015" ref-type="table">Table 3</xref>
. On admission, the patient was also started on oseltamivir 75 mg once daily for 5 days, levofloxacin 750 mg IV every 2 days for 7 days, and imipenem 500 mg IV every 6 h for 8 days. On day 11, she was started on ribavirin for 5 days, with a loading dose of 2000 mg via nasogastric tube followed by 600 mg PO every 8 h, one dose of interferon-α2b 144 μg subcutaneously, and prednisone 40 mg PO daily, tapered to 10 mg PO daily for 10 days. One week after initiation of the antiviral and steroid therapy, serum creatinine, aspartate aminotransferase (AST) <xref rid="tbl0010" ref-type="table">Table 2</xref>
, <xref rid="tbl0015" ref-type="table">Table 3</xref>
, and amylase increased (from 0.6 to 2.9 mg/dl, from 6.3 to 20 × 10<sup>9</sup>
/l, from 25 to 126 IU/l, and from 35 to 255 U/l, respectively). The patient was diagnosed with pancreatitis and thus further interferon and ribavirin was not given. The patient remained critically ill on mechanical ventilation. She died 45 days after admission from multi-organ failure.</p>
</sec>
<sec id="sec0040"><label>3.4</label>
<title>Case 4</title>
<p id="par0035">An 81-year-old man with a history of atrial fibrillation, diabetes mellitus, and hypertension was admitted with progressive respiratory distress and hypoxemia with fever for 2 days. He tested positive for MERS-CoV by PCR. Baseline laboratory data are shown in <xref rid="tbl0010" ref-type="table">Table 2</xref>
, <xref rid="tbl0015" ref-type="table">Table 3</xref>
. On the first day of hospitalization, the patient was started on oseltamivir 75 mg once daily for 6 days, levofloxacin 750 mg every 48 h for 5 days, and imipenem 250 mg IV every 6 h for 6 days. On day 20 after admission, he was started on ribavirin for 9 days, with a loading dose of 2000 mg via nasogastric tube followed by 800 mg via nasogastric tube every 8 h, two doses of interferon-α2b 100 μg subcutaneously once per week on hospital days 20 and 27, and methylprednisolone 40 mg IV every 8 h for 4 days, then 40 mg IV twice daily for 2 days, then 40 mg daily for 2 days (started on hospital day 22). Three weeks after the initiation of therapy, his hemoglobin dropped (from 11.7 to 8.7 g/dl) (<xref rid="tbl0010" ref-type="table">Table 2</xref>
), while bilirubin increased (from 0.7 to 7.4 mg/dl), suggestive of hemolysis. The patient died 52 days after admission from multi-organ failure.</p>
</sec>
<sec id="sec0045"><label>3.5</label>
<title>Case 5</title>
<p id="par0040">A 24-year-old man with a history of ESRD on hemodialysis was admitted with a febrile illness, a cough for 10 days, and respiratory failure requiring mechanical ventilation. He tested positive for MERS-CoV by PCR. Baseline laboratory data are shown in <xref rid="tbl0010" ref-type="table">Table 2</xref>
, <xref rid="tbl0015" ref-type="table">Table 3</xref>
. On the first day of hospitalization, the patient was started on oseltamivir 75 mg once daily for 2 days and imipenem 250 mg IV twice daily for 11 days. On day 19 of admission, he was started on ribavirin for 11 days, with a loading dose of 2000 mg via nasogastric tube, followed by 400 mg via nasogastric tube every 8 h, and two doses of interferon-α2b 100 μg subcutaneously once per week on hospital days 19 and 26. On the same day he started ribavirin, he was also started on methylprednisolone 40 mg IV every 8 h for 4 days, then 40 mg IV twice daily for 2 days, and then 40 mg daily for 2 days. Two weeks after the initiation of therapy, lipase increased (from 561 to 612 U/l). The patient died 32 days after admission from multi-organ failure.</p>
</sec>
</sec>
<sec id="sec0050"><label>4</label>
<title>Results</title>
<p id="par0045">We reviewed the cases of five patients with MERS-CoV (<xref rid="tbl0005" ref-type="table">Table 1</xref>
). Their median age was 62 (range 24–81) years. The patients had chronic kidney disease and four were on maintenance hemodialysis. There were three men and two women. All patients tested negative for influenza. The median number of days from admission to therapy with ribavirin and interferon was 19 (range 10–22) (<xref rid="tbl0020" ref-type="table">Table 4</xref>
). All patients received adjunctive corticosteroid therapy for acute respiratory distress syndrome. Two patients developed increased lipase after the initiation of therapy, but both of them were given corticosteroids at the same time as antiviral therapy. One patient (case 2) developed thrombocytopenia, with a platelet count that dropped from 408 to 49 × 10<sup>9</sup>
/l (<xref rid="tbl0010" ref-type="table">Table 2</xref>
, <xref rid="tbl0015" ref-type="table">Table 3</xref>
) and one patient had possible hemolysis (case 3). All patients had severe disease with progressive respiratory failure, developed multi-organ failure, and died a mean 39.6 (standard deviation 8.5) days after admission. None of the patients had bacteremia or fungemia during their hospital stay. <xref rid="fig0005" ref-type="fig">Figure 1</xref>
shows the median, minimum, and maximum values for amylase, lipase, and lactate dehydrogenase (LDH) for all the patients before initiation of therapy and at week1 and 2 after therapy initiation.<table-wrap position="float" id="tbl0020"><label>Table 4</label>
<caption><p>Days from admission to initiation of therapy or death</p>
</caption>
<table frame="hsides" rules="groups"><thead><tr><th align="left">Patient</th>
<th align="left">Days to antiviral therapy</th>
<th align="left">Days to steroid therapy</th>
<th align="left">Days to death</th>
</tr>
</thead>
<tbody><tr><td align="left">1</td>
<td align="char">21</td>
<td align="char">21</td>
<td align="char">34</td>
</tr>
<tr><td align="left">2</td>
<td align="char">22</td>
<td align="char">6</td>
<td align="char">35</td>
</tr>
<tr><td align="left">3</td>
<td align="char">10</td>
<td align="char">0</td>
<td align="char">15</td>
</tr>
<tr><td align="left">4</td>
<td align="char">19</td>
<td align="char">19</td>
<td align="char">53</td>
</tr>
<tr><td align="left">5</td>
<td align="char">18</td>
<td align="char">18</td>
<td align="char">33</td>
</tr>
</tbody>
</table>
</table-wrap>
</p>
</sec>
<sec id="sec0055"><label>5</label>
<title>Discussion</title>
<p id="par0050">Since the emergence of MERS-CoV in 2012, the virus has caused a total of 163 cases of disease, with a high case-fatality rate of 43%.<xref rid="bib0115" ref-type="bibr"><sup>2</sup>
</xref>
There is an urgent need for effective therapeutic agents. To date, no data are available on the use of any agents for the therapy of MERS-CoV-positive patients. In this report we have described the therapy of five MERS-CoV patients who received interferon and ribavirin.</p>
<p id="par0055">The patients were treated during the initial phase of the Al-Hasa outbreak in April and May 2013, a time at which the disease epidemiology and clinical characteristics were not known. Hence, there was an inevitable time lapse from admission to the initiation of therapy. All patients were already on mechanical ventilation by the time interferon and ribavirin therapy was instituted and all had a fatal outcome. The patients received the therapy late in the course of the disease, at a median of 19 (range 10–22) days after admission. Late therapy may have contributed to the poor outcome, in addition to the severity of the disease and the multiple comorbidities of the patients.</p>
<p id="par0060">The timing of initiation of antiviral therapy is critical in the treatment of most viral infections. In the treatment of SARS-CoV, no effect of oseltamivir or ribavirin was observed when these agents were started 6–14 days after symptom onset.<xref rid="bib0055" ref-type="bibr">11</xref>
, <xref rid="bib0060" ref-type="bibr">12</xref>
, <xref rid="bib0065" ref-type="bibr">13</xref>
Early therapy with ribavirin, within 48 h of hospitalization or after the diagnosis of SARS, has been shown to be associated with better outcomes, although the numbers of patients enrolled in these studies has been small.<xref rid="bib0035" ref-type="bibr">7</xref>
, <xref rid="bib0070" ref-type="bibr">14</xref>
, <xref rid="bib0075" ref-type="bibr">15</xref>
, <xref rid="bib0080" ref-type="bibr">16</xref>
, <xref rid="bib0085" ref-type="bibr">17</xref>
In the treatment of influenza, oseltamivir therapy early in the disease resulted in reduced mortality when this was started not later than 8 days after the onset of symptoms.<xref rid="bib0090" ref-type="bibr"><sup>18</sup>
</xref>
Early in vitro studies showed that ribavirin and interferon have anti-MERS-CoV activity.<xref rid="bib0095" ref-type="bibr"><sup>19</sup>
</xref>
The in vitro activity of interferon was augmented by the concomitant use of ribavirin.<xref rid="bib0100" ref-type="bibr"><sup>20</sup>
</xref>
In a rhesus macaque model of MERS-CoV infection, the combination of interferon-α2b and ribavirin therapy was effective in limiting the disease and resulted in very mild radiographic evidence of pneumonia.<xref rid="bib0105" ref-type="bibr"><sup>21</sup>
</xref>
The treatment was given within 8 h after inoculation of the rhesus macaques. Treated animals had lower levels of systemic and local proinflammatory markers and fewer viral genome copies.<xref rid="bib0105" ref-type="bibr"><sup>21</sup>
</xref>
Although these preclinical data are promising, our report illustrates some of the real world issues of dealing with a novel emerging viral infection. Our patients were not diagnosed until a week into their illnesses, by which time all five were on mechanical ventilation. They had multiple comorbidities, which most likely adversely affected their clinical outcomes. In addition, we had no serial virologic determination of MERS-CoV levels in airway secretions to shed light on the possibility of virological clearance, virological failure, or clinical failure of therapy.</p>
<p id="par0065">In our small series, adverse effects from combination ribavirin and interferon therapy were observed in three cases. These side effects have been noted before.<xref rid="bib0110" ref-type="bibr"><sup>22</sup>
</xref>
Two patients had pancreatic enzyme elevation and one had significant hemolysis. These findings were complicated by the presence of abnormal laboratory findings even before the initiation of combination therapy, so it is difficult to determine which side effects were due to disease progression and which were due to the therapeutic drugs.</p>
<p id="par0070">There is an urgent need for large-scale clinical trials to determine the safest and most effective regime for the treatment of this novel highly fatal emerging infection. While ribavirin and interferon may show promise, their use needs to be prompt and adverse effects monitored closely. This therapeutic approach should be tested in careful clinical studies.</p>
</sec>
</body>
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<ack id="ack0005"><title>Acknowledgements</title>
<p>The authors (JAT, HM, and JD) wish to acknowledge the use of the Saudi Aramco Medical Services Organization (SAMSO) facilities for the data and study, which resulted in this paper. Opinions expressed in this article are those of the authors and not necessarily of SAMSO. The authors thank Dr Paul Anantharajah Tambyah of the National University of Singapore Department of Medicine for his critical review of the manuscript.</p>
<p><italic>Financial support:</italic>
All authors have no funding.</p>
<p><italic>Conflict of interest:</italic>
All authors have no conflict of interest to declare.</p>
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