molecular characterization of recent iranian infectious bronchitis virus isolates based on s2 protein gene

Authors

kamran nazemi

department of microbiology and immunology, faculty of veterinary medicine, university of tehran, tehran, iran. arash ghalyanchi langeroudi

department of microbiology and immunology, faculty of veterinary medicine, university of tehran, tehran - iran masoud hashemzadeh

department of research and production of poultry viral vaccine, razi vaccine and serum research institute, karaj, iran. vahid karimi

department of avian medicine, faculty of veterinary medicine, university of tehran, tehran, iran. waleed seger

abstract

background: avian infectious bronchitis (ib), with avianinfectious bronchitis virus (ibv) as the causing agent, is a ubiquitous endemicdisease of the chicken with devastating effects on its industry. a viralmembrane surface protein called s  notonly induces neutralizing antibodies but also plays an important role in virusbinding and entry to host cells. technically, s1 protein gene sequencing alsohelps greatly in ibv genotyping. objectives: the aim of this study wasto characterize iranian ibv based on s2 gene. methods: after rt-pcramplification, the s2 gene of nine iranian ibv isolates were sequenced and thencompared with reference strains. results: the isolates were classifiedinto genotype i as massachusetts like ib vs, genotype vii which clustered intotwo branches, viia (is-1494 like ib viruses), and viib, and was related to qx-like viruses and genotype viii as 793/b like ibvs. conclusions: as faras we know, this is the first s2-based classification study on iranian ibvisolates providing a firm experimental basis to correlate with genotypiccharacterization

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Journal title:
iranian journal of veterinary medicine

جلد ۱۰، شماره ۴، صفحات ۲۴۵-۳۴۱

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