Abstract:
:This study was carried out to investigate the frequency and genetic diversity of pestiviruses in abortion cases in cattle and small ruminants in Turkey. During January 2012 and December 2017, a total of 2029 aborted foetuses (553 bovine foetuses, 1,388 sheep foetuses and 88 goat foetuses) were collected from different regions of Turkey. Real-time RT-PCR (RRT-PCR) assays were used to detect pestiviral RNA in aborted foetuses. To confirm the cause of abortion, pestivirus-positive foetuses were also examined for the presence of Brucella spp., Campylobacter spp., Chlamydophila abortus (C. abortus), akabane virus, bluetongue virus and Schmallenberg virus by molecular detection methods. Pestiviral RNA was detected in 61 (11%) of the 553 bovine foetuses, 124 (8.9%) of the 1,388 sheep foetuses and 3 (3.4%) of the 88 goat foetuses. Furthermore, C. abortus DNA was detected in 3 pestivirus-positive sheep foetuses, whereas other infectious agents were not detected in pestivirus-positive foetuses. Genetic characterization of the pestivirus RRT-PCR positive samples was conducted by sequencing 5' untranslated (5' UTR) and non-structural autoprotease (Npro ) genomic regions. A total of 68 sequences were obtained, and phylogenetic analyses revealed that all sequences belonged to BVDV-1, including 1b (8/68), 1f (2/68), 1l (4/68), 1r (10/68), Aydin-like pestivirus (20/68) and one unknown genotype (24/68). The 5' UTR and Npro sequences of this unknown genotype differed from pestiviruses previously described, providing evidence for the presence of an emerging genotype within the species Pestivirus I, tentatively named as 'Konya-like' pestivirus. 'Konya-like' pestivirus was the dominant genotype in sheep foetuses, whereas Aydin-like pestivirus was found to be the predominant genotype in bovine foetuses. To the best my knowledge, this is the first report of Aydin-like pestivirus infection in cattle. The information provided in this study contributes to the understanding the dissemination and evolution of pestiviruses and could be beneficial for developing more effective vaccines.
journal_name
Transbound Emerg Disjournal_title
Transboundary and emerging diseasesauthors
Şevik Mdoi
10.1111/tbed.13691subject
Has Abstractpub_date
2020-06-21 00:00:00eissn
1865-1674issn
1865-1682pub_type
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journal_title:Transboundary and emerging diseases
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pub_type: 杂志文章,评审
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