2018-2019年伊朗肉鸡场分离的新城疫病毒融合基因的分子特征及系统发育研究

E. Allahyari, M. Allymehr, A. Molouki, M. H. Fallah Mehrabadi, A. Talebi
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引用次数: 5

摘要

禽原avulavirus,俗称新城疫病毒(NDV),几十年来一直是伊朗家禽业的一个持续威胁。最近,对后院和商业鸡的一些初步研究表明,在伊朗流行的主要亚基因型可能是VII(L)亚基因型,根据新的分类系统,它现在被称为VII.1.1。该独特的亚基因型未在世界其他地区报道,与最近的VIId组略有不同(≥3%)。该研究于2018年7月至2019年3月期间进行,旨在确定伊朗肉鸡家禽养殖场中传播的NDV确切基因型/亚基因型;从伊朗18个省的36个肉鸡养殖场抽取了540只鸡样本。由于其他基因型/亚基因型,如XIII和VI.2正在邻国流行,因此也对边境省份进行了抽样。对NDV分离株的F基因进行了测序和系统发育分析。所有分离株均聚集在VII.1.1群下。进化分析还显示,距离在0.0 ~ 0.7%之间,这意味着在肉鸡养殖场流行的伊朗新城疫不仅是VII.1.1亚基因型,而且在遗传上非常相同,表明伊朗常规的ND控制措施无法阻止NDVs的流行。尽管更严格的生物安全措施在发达国家确实有效,但监测新城疫以确定流行基因型也可能有助于我们在未来实施更好的疫苗接种策略。
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Molecular characterisation and phylogenetic study of the fusion gene of Newcastle disease viruses isolated from broiler farms of Iran in 2018-2019
Avian orthoavulavirus, commonly known as Newcastle disease virus (NDV) has been a constant threat for the poultry industry of Iran for decades. Recently, a couple of preliminary studies on backyard and commercial chicken suggested that a major subgenotype circulating in Iran may be VII(L) subgenotype, which is now known as VII.1.1 according to the new classification system. The unique subgenotype was not reported from other parts of the world and was slightly (≥3%) different from the closest group that was VIId. The study was conducted between July 2018 and March 2019 to determine the exact NDV genotypes/subgenotypes circulating in Iranian broiler poultry farms; five-hundred and forty chickens were sampled from thirty-six broiler farms located in eighteen provinces of Iran. As other genotypes/subgenotypes such as XIII and VI.2 are circulating in neighbouring countries, border provinces were also sampled. The F gene of the NDV isolates was sequenced and phylogenetic analysis was conducted. All the isolates clustered under the VII.1.1 group. The evolutionary analysis also revealed that the distances were between 0.0 and 0.7% meaning that the Iranian NDV circulating in broiler farms were not only of VII.1.1 sub-genotype, but also genetically very identical, indicating that the routine control measures for ND in Iran were not able to prevent the circulating NDVs. Although stricter biosecurity measures have been really effective in developed countries, surveillance of NDV to determine the circulating genotypes might also help us to implement better vaccination strategies in the future.
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来源期刊
BULGARIAN JOURNAL OF VETERINARY MEDICINE
BULGARIAN JOURNAL OF VETERINARY MEDICINE Veterinary-Veterinary (all)
CiteScore
1.00
自引率
0.00%
发文量
26
审稿时长
15 weeks
期刊介绍: BJVM is a no-fee open-access scientific quarterly journal which covers topics related to both fundamental and applied aspects of veterinary medicine and to closely connected subjects with it. The journal publishes original papers, short communications and reviews.
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