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Human Exposure to Middle East Respiratory Syndrome Coronavirus from Livestock or Wildlife Species











FAO. 2017. Human Exposure to Middle East Respiratory Syndrome Coronavirus from Livestock or Wildlife Species (August 2017). FAO Animal Health Risk Analysis – Assessment, Issue No. 4. Rome, FAO.


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    Over the last nine years, FAO, WHO and WOAH have worked with Member States, public health professionals and experts across multiple sectors and technical disciplines to improve preparedness and response capacities for MERS-CoV and other high threat zoonotic pathogens around the world. This work continues to bring together public health and animal health experts from affected and at-risk countries, scientists, and subject matter experts of high threat respiratory pathogens to review the latest scientific evidence on MERS-CoV and improve multi-sectoral collaboration. As a follow-up to previous technical meetings on MERS-CoV hosted by FAO, WHO and WOAH, a Global Technical Meeting was convened virtually on 15-16 November 2021 to share the latest findings from accelerated efforts to implement the MERS-CoV public health research agenda and research and development (R&D) road map, in the context of the ongoing COVID-19 pandemic. This documents presents a summary of the presentations and discussions.
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    Investigating potential recombination of MERS-CoV and SARS-CoV-2 or other coronaviruses in camels
    Supplementary recommendations for the epidemiological investigation of SARS-CoV-2 in exposed animals
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    Dromedary camels are the main reservoir for Middle East Respiratory Syndrome Coronavirus (MERS-CoV). Genetic analysis of MERS-CoV isolates from humans and dromedaries revealed that direction of transmission is from camels to humans. Furthermore, several studies reported evidence of camel infection by other human CoVs, animal CoVs or unknown coronaviruses. There is evidence of recombination between different betacoronaviruses in camels. Analysis of the Angiotensin converting enzyme 2 receptor (ACE2) binding in dromedaries predicted potential binding affinity to the Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) receptor binding domain (RBD), however some other studies predicted the contrary. With the pandemic spread of SARS-CoV-2, it is not a matter of if but rather when camels will be exposed to SARS-CoV-2 in these countries. Co-circulation of both viruses in the same host can favour virus recombination, and may lead to increased virulence in animals and/or humans if the recombinant virus incorporates pathogenicity of MERS-CoV with the transmissibility of SARS-CoV-2. Further investigations into camel susceptibility to SARS-CoV-2, the possibility for recombination between MERS-CoV and SARS-CoV-2 or other coronaviruses in camels, and the associated zoonotic potential are therefore urgently required to ensure early-detection of such events.
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