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Title

Identification and molecular characterization of spotted fever group rickettsiae in ticks collected from farm ruminants in Lebanon

AuthorsFernández de Mera, Isabel G.; Blanda, Valeria; Torina, Alessandra; Dabaja, Mayssaa Fawaz; El Romeh, Ali; Cabezas-Cruz, Alejandro; Fuente, José de la
KeywordsMolecular characterization
Ruminants
Zoonoses
Ticks
Lebanon
Spotted fever group rickettsiae
Issue Date2018
PublisherElsevier
CitationTicks and Tick-borne Diseases 9(1): 104-108 (2018)
AbstractTick-borne diseases have become a world health concern, emerging with increasing incidence in recent decades. Spotted fever group (SFG) rickettsiae are tick-borne pathogens recognized as important agents of human tick-borne diseases worldwide. In this study, 88 adult ticks from the species Hyalomma anatolicum, Rhipicephalus annulatus, Rh. bursa, Rh. sanguineus sensu lato, and Rh. turanicus, were collected from farm ruminants in Lebanon, and SFG rickettsiae were molecularly identified and characterized in these ticks. The screening showed a prevalence of 68% for Rickettsia spp., including the species R. aeschlimannii, R. africae, R. massiliae and Candidatus R. barbariae, the latter considered an emerging member of the SFG rickettsiae. These findings contribute to a better knowledge of the distribution of these pathogens and demonstrate that SFG rickettsiae with public health relevance are found in ticks collected in Lebanon, where the widespread distribution of tick vectors and possible livestock animal hosts in contact with humans may favor transmission to humans. Few reports exist for some of the tick species identified here as being infected with SFG Rickettsia. Some of these tick species are proven vectors of the hosted rickettsiae, although this information is unknown for other of these species. Therefore, these results suggested further investigation on the vector competence of the tick species with unknown role in transmission of some of the pathogens identified in this study.
URIhttp://hdl.handle.net/10261/174718
Identifiersdoi: 10.1016/j.ttbdis.2017.10.001
e-issn: 1877-9603
issn: 1877-959X
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