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2019-12-14Zeitschriftenartikel DOI: 10.3390/v11121159
Ecology of West Nile Virus in the Danube Delta, Romania: Phylogeography, Xenosurveillance and Mosquito Host-Feeding Patterns
Tomazatos, Alexandru
Jansen, Stephanie
Pfister, Stefan
Török, Edina
Maranda, Iulia
Horváth, Cintia
Keresztes, Lujza
Spînu, Marina
Tannich, Egbert cc
Jöst, Hanna
Schmidt-Chanasit, Jonas cc
Cadar, Daniel
Lühken, Renke cc
Humboldt-Universität (insgesamt)
The ecology of West Nile virus (WNV) in the Danube Delta Biosphere Reserve (Romania) was investigated by combining studies on the virus genetics, phylogeography, xenosurveillance and host-feeding patterns of mosquitoes. Between 2014 and 2016, 655,667 unfed and 3842 engorged mosquito females were collected from four sampling sites. Blood-fed mosquitoes were negative for WNV-RNA, but two pools of unfed Culex pipiens s.l./torrentium collected in 2014 were tested positive. Our results suggest that Romania experienced at least two separate WNV lineage 2 introductions: from Africa into Danube Delta and from Greece into southeastern Romania in the 1990s and early 2000s, respectively. The genetic diversity of WNV in Romania is primarily shaped by in situ evolution. WNV-specific antibodies were detected for 19 blood-meals from dogs and horses, but not from birds or humans. The hosts of mosquitoes were dominated by non-human mammals (19 species), followed by human and birds (23 species). Thereby, the catholic host-feeding pattern of Culex pipiens s.l./torrentium with a relatively high proportion of birds indicates the species' importance as a potential bridge vector. The low virus prevalence in combination with WNV-specific antibodies indicate continuous, but low activity of WNV in the Danube Delta during the study period.
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DOI
10.3390/v11121159
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https://doi.org/10.3390/v11121159
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<a href="https://doi.org/10.3390/v11121159">https://doi.org/10.3390/v11121159</a>