Case report: Detection of the Middle East respiratory syndrome corona virus (MERS-CoV) in nasal secretions of a dead human
Identifieur interne : 000770 ( Pmc/Corpus ); précédent : 000769; suivant : 000771Case report: Detection of the Middle East respiratory syndrome corona virus (MERS-CoV) in nasal secretions of a dead human
Auteurs : Waleed H. MahallawiSource :
- Journal of Taibah University Medical Sciences [ 1658-3612 ] ; 2017.
Abstract
The Middle East respiratory syndrome coronavirus (MERS-CoV) has been recognized as a highly pathogenic virus that infects the human respiratory tract and has high morbidity and mortality. The MERS-CoV is a huge burden on Saudi Arabian health-care facilities, causing approximately 40% mortality. The transmission mechanism of the virus is still not well understood. Therefore, the prevention of any route of transmission is the best measure to arrest the spread of this disease. Using the real time polymerase chain reaction (RT-PCR), MERS-CoV was detected in the nasal secretions of a human cadaver. Full precautions should be applied and carefully followed to prevent the transmission of the virus, especially among health care workers.
Url:
DOI: 10.1016/j.jtumed.2017.07.004
PubMed: 31435338
PubMed Central: 6695009
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PMC:6695009Le document en format XML
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<front><div type="abstract" xml:lang="en"><p>The Middle East respiratory syndrome coronavirus (MERS-CoV) has been recognized as a highly pathogenic virus that infects the human respiratory tract and has high morbidity and mortality. The MERS-CoV is a huge burden on Saudi Arabian health-care facilities, causing approximately 40% mortality. The transmission mechanism of the virus is still not well understood. Therefore, the prevention of any route of transmission is the best measure to arrest the spread of this disease. Using the real time polymerase chain reaction (RT-PCR), MERS-CoV was detected in the nasal secretions of a human cadaver. Full precautions should be applied and carefully followed to prevent the transmission of the virus, especially among health care workers.</p>
</div>
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<pmc article-type="case-report"><pmc-dir>properties open_access</pmc-dir>
<front><journal-meta><journal-id journal-id-type="nlm-ta">J Taibah Univ Med Sci</journal-id>
<journal-id journal-id-type="iso-abbrev">J Taibah Univ Med Sci</journal-id>
<journal-title-group><journal-title>Journal of Taibah University Medical Sciences</journal-title>
</journal-title-group>
<issn pub-type="epub">1658-3612</issn>
<publisher><publisher-name>The Author. Production and hosting by Elsevier Ltd on behalf of Taibah University.</publisher-name>
</publisher>
</journal-meta>
<article-meta><article-id pub-id-type="pmid">31435338</article-id>
<article-id pub-id-type="pmc">6695009</article-id>
<article-id pub-id-type="publisher-id">S1658-3612(17)30121-X</article-id>
<article-id pub-id-type="doi">10.1016/j.jtumed.2017.07.004</article-id>
<article-categories><subj-group subj-group-type="heading"><subject>Article</subject>
</subj-group>
</article-categories>
<title-group><article-title>Case report: Detection of the Middle East respiratory syndrome corona virus (MERS-CoV) in nasal secretions of a dead human</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" id="au1"><name><surname>Mahallawi</surname>
<given-names>Waleed H.</given-names>
</name>
<degrees>PhD</degrees>
<email>wmahallawi@taibahu.edu.sa</email>
<xref rid="cor1" ref-type="corresp">∗</xref>
</contrib>
</contrib-group>
<aff id="aff1">Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Taibah University, Almadinah Almunawwarah, KSA</aff>
<author-notes><corresp id="cor1"><label>∗</label>
Corresponding address: Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Taibah University, Almadinah Almunawwarah, Prince Naif bin Abdulaziz Rd, 300, KSA. <email>wmahallawi@taibahu.edu.sa</email>
</corresp>
</author-notes>
<pub-date pub-type="pmc-release"><day>16</day>
<month>8</month>
<year>2017</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>6</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub"><day>16</day>
<month>8</month>
<year>2017</year>
</pub-date>
<volume>13</volume>
<issue>3</issue>
<fpage>302</fpage>
<lpage>304</lpage>
<history><date date-type="received"><day>23</day>
<month>5</month>
<year>2017</year>
</date>
<date date-type="rev-recd"><day>17</day>
<month>7</month>
<year>2017</year>
</date>
<date date-type="accepted"><day>23</day>
<month>7</month>
<year>2017</year>
</date>
</history>
<permissions><copyright-statement>© 2017 The Author</copyright-statement>
<copyright-year>2017</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>
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<abstract id="abs0015"><p>The Middle East respiratory syndrome coronavirus (MERS-CoV) has been recognized as a highly pathogenic virus that infects the human respiratory tract and has high morbidity and mortality. The MERS-CoV is a huge burden on Saudi Arabian health-care facilities, causing approximately 40% mortality. The transmission mechanism of the virus is still not well understood. Therefore, the prevention of any route of transmission is the best measure to arrest the spread of this disease. Using the real time polymerase chain reaction (RT-PCR), MERS-CoV was detected in the nasal secretions of a human cadaver. Full precautions should be applied and carefully followed to prevent the transmission of the virus, especially among health care workers.</p>
</abstract>
<trans-abstract xml:lang="ar"><title>الملخص</title>
<p>يُعرف فيروس ”كورونا“ المسبب لمتلازمة الشرق الأوسط التنفسية على أنه فيروس شديد العدوى يصيب الجهاز التنفسي مع معدلات مرتفعة في المضاعفات والوفيات. يُحمِّل فيروس كورونا المسبب لمتلازمة الشرق الأوسط التنفسية عبئا كبيرا على مرافق الرعاية الصحية في المملكة العربية السعودية بنسبة وفيات تقارب الـ ٤٠٪. ولا يزال انتقال الفيروس غير مفهوم بشكل جيد. ولذلك، فإن منع أي طريق للانتقال هو أفضل وسيلة لمنع انتشار هذا المرض. تم باستخدام تفاعل البوليميرايز المتسلسل الآني، الكشف عن فيروس كورونا المسبب لمتلازمة الشرق الأوسط التنفسية في الافرازات الأنفية لجثة. لذا ينبغي تطبيق الاحتياطات الكاملة ومتابعتها لمنع انتقال الفيروس، خاصة بين العاملين في مجال الرعاية الصحية.</p>
</trans-abstract>
<kwd-group xml:lang="ar" id="kwrds0010"><title>الكلمات المفتاحية</title>
<kwd>العاملين في مجال الرعاية الصحية</kwd>
<kwd>فيروس كورونا المسبب لمتلازمة الشرق الأوسط التنفسية</kwd>
<kwd>الوقاية</kwd>
<kwd>انتقال المرض</kwd>
</kwd-group>
<kwd-group id="kwrds0015"><title>Keywords</title>
<kwd>Health care workers</kwd>
<kwd>Infection control</kwd>
<kwd>MERS-CoV</kwd>
<kwd>Postmortem</kwd>
<kwd>Prevention</kwd>
<kwd>Transmission</kwd>
</kwd-group>
</article-meta>
</front>
<body><sec id="sec1"><title>Introduction</title>
<p id="p0010">The Middle East respiratory syndrome (MERS) is a novel disease that first appeared in 2012 in KSA.<xref rid="bib1" ref-type="bibr"><sup>1</sup>
</xref>
The disease is caused by a single strand RNA virus that belongs to the genus Beta coronavirus and named MERS-corona virus (MERS-CoV).<xref rid="bib2" ref-type="bibr"><sup>2</sup>
</xref>
It is assumed that the virus enters the cells via fusing with the plasma membrane by the binding of the envelope protein of the virus (S protein) to the dipeptidyl peptidase 4 (DPP4) as the host receptor, which is profusely expressed in a mammal's lung.<xref rid="bib3" ref-type="bibr"><sup>3</sup>
</xref>
</p>
<p id="p0015">The World Health Organization (WHO) has reported that as of the 13th of July 2017, there have been 2040 MERS CoV confirmed cases, with 712 deaths among 27 countries worldwide (<ext-link ext-link-type="uri" xlink:href="http://www.who.int/emergencies/mers-cov/en/" id="intref0010">http://www.who.int/emergencies/mers-cov/en/</ext-link>
, accessed on 13/07/2017). This specifies a mortality rate of approximately 39%, which was found to be linked with patients who have medical comorbidities.<xref rid="bib4" ref-type="bibr"><sup>4</sup>
</xref>
</p>
<p id="p0020">Both birds and mammals are prone to infection by a family of viruses called coronaviruses. To date, it is unknown how an animal source infects humans. Moreover, the mode of transmission of the MERS-CoV in humans is not fully understood. Knowing the mode of transmission is essential to reducing the threat of transmission and to developing effective control measures. Upon the initial appearance of the severe acute respiratory syndrome, during the coronavirus (SARS-CoV) endemic between 2002 and 2003, the phylogenetic analysis of the SARS-CoV from the patients from several terrestrial areas was vital for understanding the viral development and the level of the disease.<xref rid="bib5" ref-type="bibr"><sup>5</sup>
</xref>
Molecular analysis supported the proposition that the SARS-CoV perhaps initiated in bats and was then transmitted to humans. The results from linking the genetic relationship between the SARS-CoV in humans and in civets has shown a cross-host evolution.<xref rid="bib6" ref-type="bibr"><sup>6</sup>
</xref>
</p>
<p id="p0025">The majority of patients present with fever (98%), fever with cough (83%), and shortness of breath (72%) due to a MERS-CoV infection.<xref rid="bib7" ref-type="bibr"><sup>7</sup>
</xref>
Most of the cases were reported in Middle East countries including the KSA, Oman, Kuwait, Qatar, United Arab Emirates, Jordan and Yemen.<xref rid="bib2" ref-type="bibr">2</xref>
, <xref rid="bib4" ref-type="bibr">4</xref>
A few cases have also been documented in Asian countries (such as Iran, Bangladesh and Malaysia), North African countries (such as Egypt, Tunisia, and Algeria), European countries (for example United Kingdom, France and Germany) and the United States.<xref rid="bib8" ref-type="bibr"><sup>8</sup>
</xref>
</p>
<p id="p0030">A study conducted in KSA showed that the whole genome sequence of human- and camel-obtained virus from nasal swabs are almost identical.<xref rid="bib9" ref-type="bibr"><sup>9</sup>
</xref>
This direct evidence along with other studies suggests that the virus is transmitted to humans via direct contact with animals, especially dromedary camels in the Middle East.<xref rid="bib10" ref-type="bibr"><sup>10</sup>
</xref>
Human-to-human transmission is usually via direct contact with affected individuals and is higher among household and healthcare settings.<xref rid="bib11" ref-type="bibr"><sup>11</sup>
</xref>
</p>
<p id="p0035">In this case, report, I will introduce the first reported case of detecting the presence of the MERS-CoV by RT-PCR assay in the nasal swab of a human cadaver.</p>
</sec>
<sec id="sec2"><title>Case report</title>
<p id="p0040">A 26 years old female with a high temperature and severe cough was admitted to a hospital in the Western Province region in KSA. The woman was diagnosed with severe pneumonia and she was hospitalized, isolated, and given antibiotics and paracetamol. The woman got worse and died after two days from admission. After three days of investigations, a nasal swab had been taken for a molecular diagnostic panel of respiratory pathogens. The samples were transported to the laboratory using full precautions. A variety of laboratory molecular tests were performed including influenza A and B and MERS-CoV by RT-PCR. According to the laboratory, the samples were processed to extract the viral RNA using a fully automated machine (Roche MagNa Pure LC (RNA Viral isolation Kit; The MagNA Pure System, version 1.0)). Following that, the extracted RNA was loaded on a 96 well plate after preparation of the master mix and the addition of the internal controls (Tib Molbiol Primers and Probes with Roche Master Mix). Next, the plate was placed into the Light Cycler 480 (Roche) for the amplification and determination of the results. The laboratory report confirmed that the samples were positive for MERS-CoV.</p>
</sec>
<sec id="sec3"><title>Discussion</title>
<p id="p0045">This is the first report confirming the presence of the MERS-CoV in an infected human cadaver (three days following the death). This report should be considered seriously in terms of taking full precautions in dealing with human remains infected with the MERS-CoV, as they might be a source of infection. How the MERS-CoV transmits is unfortunately a mystery, but it is presumed to involve the direct interaction with the mucus secretion (saliva) of diseased camels or via the intake of milk or perhaps the uncooked meat. Nevertheless, it is not yet confirmed whether there is another transitional host for the MERS-CoV transmission to humans or not.<xref rid="bib12" ref-type="bibr"><sup>12</sup>
</xref>
A secondary infection could occur by droplets, and the virus could possibly spread either via air or fomites.<xref rid="bib13" ref-type="bibr"><sup>13</sup>
</xref>
</p>
<p id="p0050">For the diagnosis of a MERS-CoV infection, routine nasopharyngeal and oropharyngeal swabs must be taken together. Both swabs must be combined and placed immediately into the same sterile tubes containing 2–3 ml of a viral transport media. Two genes of the MERS-CoV must be recognized as appropriate markers for the diagnostic test—the upstream E protein gene (upE) and the open reading frame (ORF) 1A. Positive controls for the upE screening and the ORF 1A confirmation assays also should be added.<xref rid="bib14" ref-type="bibr"><sup>14</sup>
</xref>
The test result is considered positive if both assays gave positive results, as occurred in the processed patient samples in this report.</p>
<p id="p0055">The Ministry of Health (MOH) in KSA has imposed very strict policies and legislation with regard to a MERS-CoV infection. The MERS-CoV, similar to other coronaviruses, is believed to transmit from an infected person's respiratory secretions, such as through coughing. However, the exact route of the virus transmission is not currently well understood (<ext-link ext-link-type="uri" xlink:href="https://www.cdc.gov/coronavirus/mers/about/transmission.html" id="intref0015">https://www.cdc.gov/coronavirus/mers/about/transmission.html</ext-link>
, accessed on 18.03.2017).</p>
<p id="p0060">Prevention and control by timely diagnosis and intra-hospital isolation are equally critical in terms of stopping the spread of the MERS-CoV infection. Health care workers should use personal protective equipment (PPE) such as gloves, gowns and effective masks such as an N95 mask before interacting with the patient (<ext-link ext-link-type="uri" xlink:href="http://www.moh.gov.sa/en/CCC/Regulations/Precautions%20for%20Caring.pdf" id="intref0020">http://www.moh.gov.sa/en/CCC/Regulations/Precautions%20for%20Caring.pdf</ext-link>
, accessed on 29/03/2017).</p>
<p id="p0065">Additionally, suspected or confirmed patients must also use a mask before exiting the room and should relocate using isolated paths to avoid communication with non-MERS patients. All these precautions are obligatory and must be followed to avoid the catastrophic situations that occurred in Saudi Arabian MERS patients<xref rid="bib15" ref-type="bibr"><sup>15</sup>
</xref>
as well as those in South Korean hospital settings.<xref rid="bib16" ref-type="bibr"><sup>16</sup>
</xref>
</p>
<p id="p0070">Therefore, when dealing with patients with a MERS-CoV infection, the precautions must include negative pressure isolation rooms well equipped with HEPA filters. In addition, those patients should be reserved in a single-occupancy isolated room.<xref rid="bib17" ref-type="bibr"><sup>17</sup>
</xref>
</p>
<p id="p0075">In the case of patient death, and depending on our finding, the deceased should be treated as infectious and as having the possibility to transmit the infection. A postmortem caretaker wearing PPE must cover the body in accordance with corpse handling guidelines. No washing, wiping, or undressing of the body should be done. Additionally, the external surfaces of the body bag must be sanitized and placed into a second bag for double sealing.<xref rid="bib18" ref-type="bibr"><sup>18</sup>
</xref>
</p>
</sec>
<sec id="sec4"><title>Conclusions and recommendations</title>
<p id="p0080">In conclusion, full precautions should be taken when dealing with patients infected with the MERS-CoV or dealing with the remains of a person who has died because of an infection with the MERS-CoV. Health care workers and all of the staff members must be aware of and abide by the infection control measures and procedures. More strict regulations and legislation should be introduced and applied, especially to those who are dealing with deceased patients with unknown causes of death. Additionally, new health care workers must be trained and qualified to address all infectious diseases, especially to the newly emerged diseases, such as the MERS-CoV.</p>
</sec>
<sec id="sec5"><title>Conflict of interest</title>
<p id="p0085">The author has no conflict of interest to declare.</p>
</sec>
</body>
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