Résumé
En 2012, une nouvelle maladie virale émergente est apparue au Moyen-Orient, le MERS, abréviation en anglais pour « Syndrome respiratoire du Moyen-Orient ». Au 9 janvier 2014, elle avait déjà touché 178 personnes dans le monde, dont 75 étaient décédées dans un tableau d’insuffisance respiratoire et de diarrhée. La nouvelle maladie ressemblait cliniquement au SRAS (2002–2003), de sinistre mémoire, et comme le SRAS, était provoquée par un Betacoronavirus nouveau. On a donc pensé que des chiroptères pouvaient être à l’origine du MERS. D’ailleurs, de nouvelles études ont montré qu’en Arabie Saoudite un exemplaire de la chauve-souris Taphozous perforatus hébergeait un segment de quelques nucléotides identique au segment homologue de la souche isolée du cas-index de l’épidémie. De plus, de nombreuses souches de Betacoronavirus, plus ou moins proches génétiquement de celles responsables du MERS chez l’Homme, ont été isolées de chauves-souris en Afrique, en Asie et en Europe. Mais, une autre hypothèse a été proposée simultanément incriminant le dromadaire (Camelus dromedarius L) comme acteur très vraisemblable dans la transmission de la maladie. Elle est basée sur des observations épidémiologiques et les résultats de plusieurs enquêtes sérologiques. Un bilan des autres zoonoses virales dans lesquelles le dromadaire est plus ou moins impliqué renforce cette hypothèse: le MERS-CoV, l’agent étiologique du nouveau syndrome, pourrait bien être véhiculé par cet animal.
Mots clés: Syndrome respiratoire du Moyen-Orient, Betacoronavirus, Chauves-souris, Dromadaire, Transmission à l’Homme
Abstract
In 2012 a new viral emergent human disease appeared in the Middle East. This entity was named MERS for’ Middle East respiratory syndrome’. By January 9, 2014, the disease had already struck 178 persons of whom 75 died from respiratory failure and diarrhoea. As the new disease was very similar to the deadly SARS (2002–2003) and since it was provoked by a Betacoronavirus, chiroptera were first suspected to be at the origin of this infection. Morever, recent studies performed in Saudi Arabia showed that one individual of the bat Taphozous perforatus harbored a short nucleotide segment identical to the homologous segment present in the viral strain isolated from the index-case of the epidemic. In addition, many strains of Betacoronavirus more or less related to those responsible for the MERS disease in man have been isolated from bats in Africa, Asia and Europe. However, another hypothesis was simultaneously proposed incriminating dromedary (Camelus dromedarius L.) as a likely actor in the transmission to human beings of the disease.We then reviewed data relative to other viral zoonosis in which dromedary was possibly implicated. This led to the provisional conclusion that this large mammal might play a role in the dissemination of the MERS-COV, the etiologic agent of the disease. This is based on epidemiological data and results of several serological surveys in animals.
Keywords: Middle East respiratory syndrome, Betacoronavirus, Chiroptera, Dromedary, Transmission to humans
Références
- 1.Annan A, Baldwin HJ, Corman VM, et al. Human betacoronavirus 2c EMC/2012-related viruses in bats, Ghana and Europe. Emerg Infect Dis. 2013;19(3):456–449. doi: 10.3201/eid1903.121503. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 2.Assiri A, Al-Tawfiq JA, Al-Rabeeah AA, et al. Epidemiological, demographic, and clinical characteristics of 47 cases of Middle East respiratory syndrome coronavirus disease from Saudi Arabia: a descriptive study. Lancet Infect Dis. 2013;13(9):752–761. doi: 10.1016/S1473-3099(13)70204-4. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 3.Bouhous A, Aissi M, Harhour KH. Etude des Ixodidae chez le dromadaire dans le sud algérien, région d’Adrar. Ann Méd Vét. 2008;152:52–58. [Google Scholar]
- 4.Breban R, Riou J, Fontanet A. Interhuman transmissibility of Middle East respiratory syndrome coronavirus: estimation of pandemic risk. Lancet. 2013;382(9893):694–699. doi: 10.1016/S0140-6736(13)61492-0. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 5.Carletti F, Castilletti C, Di Caro A, et al. Alkhurma hemorrhagic fever in travelers returning from Egypt, 2010. Emerg Infect Dis. 2010;16(12):1979–1982. doi: 10.3201/eid1612.101092. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 6.Charrel RN, de Lamballerie X. Le virus Alkhurma (famille Flaviviridae, genre Flavivirus): un pathogène émergent responsable de fièvres hémorragiques au Moyen-Orient. Méd Trop. 2003;63(3):296–299. [PubMed] [Google Scholar]
- 7.Charrel RN, Fagbo S, Moureau G, et al. Alkhurma hemorrhagic fever virus in Ornithodoros savignyi ticks. Emerg Infect Dis. 2007;13(1):153–155. doi: 10.3201/eid1301.061094. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 8.Cotten M, Watson SJ, Kellam P, et al. Transmission and evolution of the Middle East respiratory syndrome coronavirus in Saudi Arabia: a descriptive genomic study. Lancet. 2013;382(9909):1393–2002. doi: 10.1016/S0140-6736(13)61887-5. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 9.Euro Surveill. 2013. [DOI] [PubMed]
- 10.Fassi-Fehri MM. Les maladies des camélidés. Rev sci tech Off int Epiz. 1987;6(2):315–335. doi: 10.20506/rst.6.2.305. [DOI] [PubMed] [Google Scholar]
- 11.Guan Y, Zheng BJ, He YQ, et al. Isolation and characterization of viruses related to the SARS coronavirus from animals in southern China. Science. 2003;302(5643):176–178. doi: 10.1126/science.1087139. [DOI] [PubMed] [Google Scholar]
- 12.Guangwen L, Di L. SARS-like virus in the Middle East: a truly bat-related coronavirus causing human diseases. Protein Cell. 2012;3(11):803–805. doi: 10.1007/s13238-012-2811-1. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 13.Guery B, Poissy J, el Mansouf L, et al. Clinical features and viral diagnosis of two cases of infection with Middle East Respiratory Syndrome coronavirus: a report of nosocomial transmission. Lancet. 2013;381(9885):2265–2272. doi: 10.1016/S0140-6736(13)60982-4. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 14.Euro Surveill. 2013.
- 15.Ithete NL, Stoffberg S, Corman VM, et al. Close relative of human Middle East respiratory syndrome coronavirus in bat, South Africa. Emerg Infect Dis. 2013;19(10):1697–1699. doi: 10.3201/eid1910.130946. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 16.Maha A, El Tigani, Mohammed AS. Ticks (Acari: Ixodidae) infesting camels in El Butana area Mid-Central Sudan. Sudan J Vet Res. 2010;25:51–54. [Google Scholar]
- 17.Meegan JM. The Rift Valley fever epizootic in Egypt 1977–78. 1. Description of the epizootic and virological studies. Trans R Soc trop Med Hyg. 1979;73(6):618–623. doi: 10.1016/0035-9203(79)90004-X. [DOI] [PubMed] [Google Scholar]
- 18.Meegan JM, Hoogstraal H, Moussa MI. An epizootic of Rift Valley fever in Egypt in 1977. Vet Rec. 1979;105(6):124–125. doi: 10.1136/vr.105.6.124. [DOI] [PubMed] [Google Scholar]
- 19.Meegan JM, Khalil GM, Hoogstraal H, Adham FK. Experimental transmission and field isolation studies implicating Culex pipiens as a vector of Rift Valley fever virus in Egypt. Am J Trop Med Hyg. 1980;29(6):1405–1410. doi: 10.4269/ajtmh.1980.29.1405. [DOI] [PubMed] [Google Scholar]
- 20.Memish ZA, Mishra N, Olival KJ, et al. Middle East respiratory syndrome Coronavirus in bats, Saudi Arabia. Emerg Infect Dis. 2013;19(11):1819–1823. doi: 10.3201/eid1911.131172. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 21.Nazifi S, Tamadon A, Behzadi M-A, et al. One-humped camels (Camelus dromedaries) hard ticks infestation in Qeshm Island, Iran. Vet Res Forum. 2011;2(2):135–138. [Google Scholar]
- 22.Euro Surveill. 2013.
- 23.Euro Surveill. 2013.
- 24.Reusken CB, Haagmans BL, Müller MA, et al. Middle East respiratory syndrome coronavirus neutralising serum antibodies in dromedary camels: a comparative serological study. Lancet Infect Dis. 2013;13(10):859–866. doi: 10.1016/S1473-3099(13)70164-6. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 25.Saluzzo JP, Aubry P, Aubert H, Digoutte JP. La maladie à virus CHF-Congo en Afrique. A propos d’un cas à manifestations hémorragiques en Mauritanie. Bull Soc Path Exot Filiales. 1985;78(2):164–169. [PubMed] [Google Scholar]
- 26.Shommein AM, Osman AM. Diseases of camels in the Sudan. Rev sci techn Off int Epiz. 1987;6(2):481–486. doi: 10.20506/rst.6.2.298. [DOI] [PubMed] [Google Scholar]
- 27.Smith I, Wang LF. Bats and their virome: an important source of emerging viruses capable of infecting humans. Curr Opin Virol. 2013;3(1):84–91. doi: 10.1016/j.coviro.2012.11.006. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 28.Van Straten M, Jongejan F. Ticks (Acari: Ixodidae) infesting the Arabian camel (Camelus dromedarius) in the Sinai, Egypt with a note on the acaricidal efficacy of ivermectin. Exp Appl Acarol. 1993;17(8):605–616. doi: 10.1007/BF00053490. [DOI] [PubMed] [Google Scholar]
- 29.Wang M, Hu Z. Bats as animal reservoirs for the SARS coronavirus: Hypothesis proved after 10 years of virus hunting. Viro Sin. 2013;28(6):315–317. doi: 10.1007/s12250-013-3402-x. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 30.WHO/GAR . Middle East respiratory syndrome coronavirus (MERS-CoV) — update. 2014. [Google Scholar]
- 31.Williams RE, Hoogstraal H, Casals J, et al. Isolation of Wanowrie, Thogoto, and Dhori viruses from Hyalomma ticks infesting camels in Egypt. J Med Entomol. 1973;10(2):243–246. doi: 10.1093/jmedent/10.2.143. [DOI] [PubMed] [Google Scholar]
- 32.Wünschmann A, Frank R, Pomeroy K, Kapil S. Enteric coronavirus infection in a juvenile dromedary (Camelus dromedarius) J Vet Diagn Invest. 2002;14(5):441–444. doi: 10.1177/104063870201400518. [DOI] [PubMed] [Google Scholar]
- 33.Zaki AM, van Boheemen S, Bestebroer TM, et al. Isolation of a novel coronavirus from a man with pneumonia in Saudi Arabia. N Engl J Med. 2012;367(19):1814–1820. doi: 10.1056/NEJMoa1211721. [DOI] [PubMed] [Google Scholar]
