#Epidemiological study of #MERS #coronavirus #infection in dromedary #camels in #Saudi Arabia, April-May 2015 (Rev Sci Tech., abstract)

[Source: US National Library of Medicine, full page: (LINK). Abstract, edited.]

Rev Sci Tech. 2018 Dec;37(3):985-997. doi: 10.20506/rst.37.3.2901.

Epidemiological study of Middle East respiratory syndrome coronavirus infection in dromedary camels in Saudi Arabia, April-May 2015.

Elfadil AA, Ahmed AG, Abdalla MO, Gumaa E, Osman OH, Younis AE, Al-Hafufi AN, Saif LJ, Zaki A, Al-Rumaihi A, Al-Harbi N, Kasem S, Al-Brahim RH, Al-Sahhaf A, Bayoumi FE, Qasim IA, Abu-Obeida A, Al-Dowairij A.

Abstract 

A cross-sectional study was conducted in five regions in Saudi Arabia to investigate the epidemiology of Middle East respiratory syndrome coronavirus (MERS-CoV) infection in dromedary camels (Camelus dromedarius) during April and May2015. Serum and nasal swab samples were tested for MERS-CoV antibodies and ribonucleic acid (RNA) using a recombinant enzyme-linked immunosorbent assay (rELISA) and real-time reverse-transcription polymerase chain reaction (rRT-PCR), respectively. The overall MERS-CoV antibody seroprevalence was 80.5%, whereas the overall viral RNA prevalence was 2.4%. The associations of risk factors with each prevalence were quantified using univariate and multivariate analyses. The multivariate models identified region, age, grazing system, exposure to wild animals and dung removal as factors significantly associated with seroprevalence (p ??0.05). A higher seroprevalence was more likely to occur in camels from the Riyadh, Eastern, Northern and Makkah regions than those from the Jazan region; camels ??4 and 1-3 years of age (marginally significant) than calves < 1 year; and camels raised in zero grazing and semi-open grazing systems than those raised in an open grazing system. However, the presence of wild animals and daily dung removal were negatively associated with seroprevalence. On the other hand, region and sex were significantly associated with MERS-CoV RNA prevalence(p ??0.05). A higher viral RNA prevalence was more likely to occur in camels from the Riyadh region and Eastern region (marginally significant) than in those from the Makkah region, and in male camels than female camels. In conclusion, the risk factors identified in this study can be considered to be predictors of MERS-CoV infection in camels and should be taken into account when developing an efficient and cost-effective control strategy.

KEYWORDS: Camel; Dromedary camel; Epidemiology; MERS-CoV; Middle East respiratory syndrome coronavirus; Prevalence; Risk factor; Saudi Arabia

PMID: 30964454 DOI: 10.20506/rst.37.3.2901

Keywords: MERS-CoV; Saudi Arabia; Camels; Seroprevalence.

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gimi69

I am an Italian blogger, active since 2005 with main focus on emerging infectious diseases such as avian influenza, SARS, antibiotics resistance, and many other global Health issues. Other fields of interest are: climate change, global warming, geological and biological sciences. My activity consists mainly in collection and analysis of news, public services updates, confronting sources and making decision about what are the 'signals' of an impending crisis (an outbreak, for example). When a signal is detected, I follow traces during the entire course of an event. I started in 2005 my blog ''A TIME'S MEMORY'', now with more than 40,000 posts and 3 millions of web interactions. Subsequently I added an Italian Language blog, then discontinued because of very low traffic and interest. I contributed for seven years to a public forum (FluTrackers.com) in the midst of the Ebola epidemic in West Africa in 2014, I left the site to continue alone my data tracking job.

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