Animal health

MERS-CoV situation update

21 March 2024, 12:00 hours; Rome

Overview

Situation: Middle East Respiratory Syndrome Coronavirus (MERS-CoV): zoonotic virus with pandemic potential.

Countries with known human cases1: Jordan, Saudi Arabia (KSA), Qatar, the United Arab Emirates (UAE), Oman, Kuwait, Yemen, United Kingdom, France, Germany, Italy, Tunisia, Malaysia, the Philippines, the United States of America (USA), Egypt, Lebanon, the Netherlands, Iran, Algeria, Turkey, Austria, Greece, Republic of Korea, China, Thailand, the Kingdom of Bahrain.

Findings in humans: 2,609 cases confirmed with 939 fatalities (since September 2012)2. No new outbreaks and no fatalities were reported since the last Update (15 February 2024). Please see ‘Situation in humans’ for further details.

Countries with published animal findings (serology and/or virology): Algeria, Bangladesh, Burkina Faso, Djibouti, Egypt, Ethiopia, Iran, Iraq, Israel, Jordan, Kazakhstan, Kenya, Kuwait, Mali, Mongolia, Morocco, Nigeria, Oman, Pakistan, Qatar, Saudi Arabia (KSA), Senegal, Somalia, Spain (Canary Islands), Sudan, Tunisia, Uganda, United Arab Emirates.

1 Countries in order of first reported occurrence.
2 For detailed information on human cases, please refer to WHO.

Situation in animals

  • Map 1 shows results of published MERS-CoV livestock field surveys conducted up to 14/02/2024  at country level, over an estimate of dromedary and Bactrian camel distribution density. Circles indicate countries in which field surveys have occurred. Circle size is proportional to the number of studies conducted in each country (see legend). Yellow circles indicate positive findings in animals (antibodies or antigen), while turquoise circles indicate a lack of positive findings. The density map includes dromedary and Bactrian camel distribution, and is a result of an unpublished model’s predictions based on the methodology described in Robinson et al. (2014).

Map 1. MERS-CoV livestock field surveys by country*

*Note: Positive findings in Spain refer to samples taken in the Canary Islands. Livestock surveillance in Chile, not pictured, resulted negative.

Situation in humans

  • Between 15 of February to 21 March 2024, no new human cases and no fatalities attributable to MERS-CoV infection were reported.

Map 2. Global distribution of human cases of MERS-CoV

Global distribution of human cases of MERS-CoV


Note:
Stars highlight countries reporting human cases since 2020 (Oman, Saudi Arabia, Qatar, and United Arab Emirates).

Table 1. MERS-CoV cases in humans by country and dates of first and most recent observations

Country Cumulative number of confirmed
MERS-CoV human cases
First observation Last Observation
Middle East

Saudi Arabia

2 200

13/06/2012

31/10/2023

United Arab Emirates

94

19/03/2013

10/07/2023

Jordan

28

02/04/2012

26/09/2015

Qatar

28

15/08/2013

18/03/2022

Oman

26

26/10/2013

28/12/2022

Iran (Islamic Republic of)

6

11/05/2014

18/03/2015

Kuwait

4

30/10/2013

08/09/2015

Lebanon

2

22/04/2014

08/06/2017

Yemen

1

17/03/2014

17/03/2014

Bahrain (the Kingdom of)

1

04/04/2016

04/04/2016

Asia

Republic of Korea

186

11/05/2015

28/08/2018

Philippines

2

15/04/2014

30/06/2015

Thailand

3

10/06/2015

25/07/2016

China

1

21/05/2015

21/05/2015

Malaysia

2

08/04/2014

24/12/2017

Europe

United Kingdom

5

03/09/2012

16/08/2018

Germany

3

05/10/2012

07/03/2015

Netherlands

2

01/05/2014

05/05/2014

France

2

23/04/2013

27/04/2013

Austria

2

22/09/2014

08/09/2016

Turkey

1

25/09/2014

25/09/2014

Italy

1

25/05/2013

25/05/2013

Greece

1

08/04/2014

08/04/2014

Americas

United States of America

2

14/04/2014

01/05/2014

Africa

Tunisia

3

01/05/2013

17/06/2013

Algeria

2

23/05/2014

23/05/2014

Egypt

1

22/04/2014

22/04/2014

Figure 1. Human epidemiological timeline (with cases reporting animal exposure in blue), by month of disease onset (since January 2015)

Figure 2. Breakdown of human MERS-CoV cases by potential source of exposure (in percent).

Breakdown of human MERS-CoV cases by potential source of exposure

Note: While infection control improves in healthcare settings and history of animal contact is recorded more consistently in case investigations, the overall number of cases has decreased (see Figure 1: Human Epidemiological Timeline). The apparent increase in proportion of primary cases with animal exposure therefore should be interpreted in the overall context of a reduced human case count. Data not displayed prior to July 2015 as a result of inconsistent collection of human epidemiological data before this date.

Recent publications

Ogoti, B. M., Riitho, V., Wildemann, J., Mutono, N., Tesch, J., Rodon, J., Harichandran, K., Emanuel, J., Möncke-Buchner, E., Kiambi, S., Oyugi, J., Mureithi, M., Corman, V. M., Drosten, C., Thumbi, S. M., & Müller, M. A. (2024). Biphasic MERS-CoV Incidence in Nomadic Dromedaries with Putative Transmission to Humans, Kenya, 2022-2023Emerging infectious diseases, 30(3), 581–585. [reference] A year-long study at a Kenyan abattoir revealed two peaks of MERS-CoV incidence in dromedaries: October 2022 and February 2023. Additionally, 7 out of 48 abattoir workers exposed to dromedaries showed serologic evidence of prior MERS-CoV exposure.

Country-level actions

Egypt

  • Abattoir and risk-based MERS-CoV surveillance in camels is still under discussion considering the recently developed camel value chain study. The plan aims to isolate and characterize MERS-CoV to understand if the virus being maintained in the camel population of Egypt is similar to the clades in other countries.
  • A joint meeting was organized with public health authorities to explore the opportunity to conduct a joint study between animal and public health sectors in targeted areas (abattoir) to better understand the transmission dynamic of MERS-COV.

Ethiopia

  • A Participatory Disease Search (PDS) took place in the Afar and Somali Regional States of Ethiopia, specifically in eight sites/kebeles. The primary objective of the PDS was to enhance knowledge regarding disease patterns in camel populations, detect temporal and spatial trends, and evaluate risk factors. Special attention was given to comprehending and confirming the recurring reports of unidentified camel diseases. Currently, the process of preparing a comprehensive report based on the findings of the Participatory Disease Search (PDS) is underway.
  • The terminal report for the MERS-CoV project has been prepared and shared with the project focal points at the FAO Headquarters. This report provides a comprehensive overview of the essential elements, achievements, and impacts of the MERS-CoV surveillance and management project in Ethiopia.
  • Contributed to the review of the Regional MERS-CoV surveillance framework, which is currently being developed through expert consultants based in Nairobi. Cost for recruitment of the consultants is jointly covered through project funds from Kenya and Ethiopia.

Kenya

  • Kenya contributed to review the Regional MERS-CoV surveillance framework that was conducted through a virtual process.
  • Kenya participated in the 2023 Quadripartite Global Technical Meeting. Several presentations regarding the MERS-CoV surveillance on the country were delivered, including a poster on "Antibody Dynamics for MERS-CoV in pastoral and ranched camel herds in Kenya; A longitudinal study” from the Directorate of Veterinary Services supported by FAO, as well as a video showcasing the achievements of FAO’s MERS-CoV project in Kenya.
  • FAO Kenya has supported procurement of laboratory and field consumables for MERS-CoV Surveillance and molecular testing.
  • FAO Kenya has supported shipment of positive controls from Hong Kong University to Kenya Directorate of Veterinary Services (DVS) Laboratories for use in molecular testing.

Jordan

  • As part of the Global Health Security Program (GHSP):
    • A joint meeting was organized with the veterinary services and Jordan Center for Disease control (JCDC) to overview the support and coordination to enhance early detection and characterization of MERS-CoV in camels.
    • An introductory meeting was held for relevant stakeholders to introduce the GHSP project activities including MERS-CoV.
  • Jordan participated in the 2023 Quadripartite Global Technical Meeting, presenting a poster entitled “High Prevalence of Middle East Respiratory Coronavirus in Young Dromedary Camels in Jordan”.
FAO and partners
  • FAO, WHO, WOAH and UNEP, together with the Public Health Authority of the Kingdom of Saudi Arabia (KSA), held the Quadripartite Global Technical Meeting on MERS-CoV and Other Emerging Zoonotic Coronaviruses from 27 to 29 November 2023, in Riyadh, KSA. The meeting brought together more than 200 experts, researchers, government representatives of affected and at-risk countries, representatives of funding agencies, industrial partners and representatives from FAO, UNEP, WOAH and WHO at headquarters, regional and national levels, to share the latest findings from accelerated efforts to implement the MERS-CoV public health research agenda and R&D road map.
  • FAO brought together technical experts from countries implementing the Emerging Pandemic Threats Programme (EPT2) MERS-CoV Project (Egypt, Kenya, Ethiopia, and Jordan) to share experiences and discuss future options for MERS-CoV surveillance at the Inter-Regional Consultative Workshop on Mers-Cov Surveillance, that took place in Nairobi, Kenya, from 19 to 21 September 2023. The final communiqué regarding the outcomes of the workshop has been shared with meeting participants.
  • FAO participated in the WHO EPI-WIN webinar: MERS-CoV, a circulating coronavirus with epidemic and pandemic potential - Pandemic preparedness, prevention and response with a One Health approach, on 24 May 2023. The discussion can be found on the WHO EPI-WIN webinar website [reference]. A EPI-WIN update on MERS-CoV following the webinar discussion is available [reference].
  • FAO participated in the 3rd scientific conference of the Eastern Mediterranean Acute Respiratory Infection Surveillance (EMARIS) Network held from 13-15 March 2023 [reference].
  • The report on the FAO-WOAH-WHO organized “Global tripartite technical meeting on MERS-CoV and other emerging zoonotic coronaviruses”, on 15-16 November 2021, has been published [reference].
  • The Quadripartite has published the One Health Joint Plan of Action (OH-JPA). It provides a framework for action and proposes a set of activities that the four organizations can offer together to enable countries to advance and scale up One Health in managing human, animal, plant and environment health threats [reference].
  • FAO organized a technical workshop on “Qualitative Risk Assessment of MERS-CoV foreign clade introduction to Africa” from July 5 – 6, 2022, hosted by the FAO Egypt office in Cairo. Participants included camel movement experts from different African, Near East, and European countries, as well as FAO MERS-CoV country focal points from Egypt, Ethiopia, Jordan, and Kenya. The final report is underway.
  • FAO publishes a quarterly situation updates on SARS-CoV-2 in animals [reference].
  • FAO published recommendations for the epidemiological investigation of SARS-CoV-2 in exposed animals [reference], including a supplement on investigating potential recombination of MERS-CoV and SARS-CoV-2 or other coronaviruses in camels. [reference]
  • The Joint Risk Assessment Operational Tool is available in Arabic, Chinese, and Russian. [reference]
  • A peer-reviewed article was published by the Hong Kong University (HKU) [reference] on genetic and phenotypic characteristics of MERS-CoV isolates sampled from camels in Burkina Faso, Egypt, Ethiopia, Kenya, Morocco, and Nigeria, and compared to viruses isolated in the Arabian Peninsula. FAO, under the EPT-2 project contributed samples taken in Ethiopia and Kenya. The findings highlight the need for enhanced MERS-CoV surveillance in dromedaries and humans in Africa and for measures to avoid introduction of clade B viruses from the Arabian Peninsula to Africa.
  • FAO has published a SARS-CoV-2 qualitative exposure assessment [reference] which provides a comprehensive review of available scientific evidence and assessment of exposure risk from different wild or domestic animal species. Results can inform country-level risk assessments and provide the evidence base for targeted SARS-CoV-2 investigations in animals and mitigation options. The e-book version can be found here: [reference], and the summary is now available in all UN languages. [reference]
  • FAO published an illustrative guideline describing optimized procedures to facilitate swab sampling from the deeper part of the upper respiratory tract inside the camel’s nasal cavity and to collect good quality specimens from slaughtered camels. [ reference]
  • The Tripartite Zoonoses Guide is now available in all UN languages. [reference]
  • In close collaboration with WOAH and WHO, monitoring the situation / inter-agency teleconferences.
  • Analysing available data, including results from surveillance in camels and advanced characterization of the virus.
  • Providing technical assistance and guidance to countries to improve understanding of the disease situation and help fill existing gaps in epidemiological knowledge.
  • Supporting national laboratories to develop capacity in serology and PCR diagnostic for MERS-CoV, quality assurance and quality control and biosafety, and establish national sample banks;
  • Keeping a dialogue between the scientific community and the field to ensure needs and gaps are addressed.
  • Assist in developing communication strategies to ensure appropriate information reaches the public on MERS-CoV and avoid possible negative impacts of the crisis on the livestock industry.
Next issue: Jun. 2024
The disease situation updates are produced by the FAO Emergency Prevention System for Animal Health (EMPRES-AH) as part of its mission to increase global disease intelligence.
Disclaimer

Information provided herein is current as of the date of issue. Information added or changed since the last MERS-CoV situation update appears in orange. Human cases are depicted in the geographic location of their report. For some cases, exposure may have occurred in one geographic location but reported in another. For cases with unknown onset date, reporting date was used instead. FAO compiles information drawn from multiple national (Ministries of Agriculture or Livestock, Ministries of Health; Centers for Disease Prevention and Control [CDC]) and international sources (World Health Organization [WHO], World Organisation for Animal Health [WOAH]) as well as peer-reviewed scientific articles. FAO makes every effort to ensure, but does not guarantee, accuracy, completeness or authenticity of the information. The designation employed and the presentation of material on the map do not imply the expression of any opinion whatsoever on the part of FAO concerning the legal or constitutional status of any country, territory or sea area, or concerning the delimitation of frontiers.

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