نتایج جستجو برای: 1 gene is a hypervariable region among ibv serotypes

تعداد نتایج: 15067648  

A Ghalyanchi-Langeroudi , A Jannat , F Gholami , M Hashemzadeh , M Heidarzadeh , MH Fallah , MT Zabihi , V Karimi,

Abstract Background and Aims: Infectious bronchitis virus (IBV) is the causative agent of avian infectious bronchitis, which is characterized by respiratory, reproductive, and renal signs. IBV is a highly variable virus with a large number of genotypes. S1 gene sequencing has been used for molecular epidemiological studies and genotypic characterization of IBV. To better und...

Journal: :iranian journal of virology 0
mm rafiei poultry diseases section, department of clinical sciences, faculty of veterinary medicine, university of tehran, tehran, iranpoultry diseases section, department of clinical sciences, faculty of veterinary medicine, university of tehran, tehran, iran m vasfi-marandi poultry diseases section, department of clinical sciences, faculty of veterinary medicine, university of tehran, tehran, iran mh bozorgmehri-fard poultry diseases section, department of clinical sciences, faculty of veterinary medicine, university of tehran, tehran, iran s ghadi poultry diseases section, department of clinical sciences, faculty of veterinary medicine, university of tehran, tehran, iran

background and aims: infectious bronchitis virus (ibv) causes an acute, highly contagious respiratory and kidney disease of chickens which results in significant economic losses in commercial broilers, layers and breeders. rapid identification of ibv serotypes involved in respiratory complex is a problem in the differential diagnosis. materials and methods: in this study, a single and multiplex...

Journal: :iranian journal of virology 0
a mahdi department of microbiology, faculty of biological sciences, university of shahid beheshti, tehran, iran a ghalyanchi-langeroudi *, department of microbiology & immunology, faculty of veterinary medicine, university of tehran, tehran, iran sm hosseini department of microbiology, faculty of biological sciences, university of shahid beheshti, tehran, iran m soleimani tasnim biotechnology of research center (tbrc), faculty of medicine, aja university of medical sciences, tehran, iran ah mohseni department of microbiology, faculty of basic sciences, science and research branch, islamic azad university, tehran, iran

infectious bronchitis virus (ibv) belongs to the group of gamma coronaviruses along with other avian coronaviruses. the disease caused by ibv can appear similar to infectious laryngotracheitis, avian influenza, and velogenic newcastle disease, which are high priority diseases. the clinical signs can be accompanied by mortalities in broiler chickens and reduced eggshell and albumin quality in la...

Journal: :jundishapur journal of microbiology 0
neda zeinali nia department of pathobiology, school of public health, tehran university of medical sciences, tehran, ir iran mohammad reza pourmand department of pathobiology, school of public health, tehran university of medical sciences, tehran, ir iran; school of public health and biotechnology research center, tehran university of medical sciences, tehran, ir iran. tel: +98-2188954910, fax: +98-2188954910 parviz afrough department of pathobiology, school of public health, tehran university of medical sciences, tehran, ir iran

background: methicillin resistant staphylococcus aureus (mrsa) is a common major human pathogen that causes hospital-acquired infections. characterization and typing of the staphylococcal cassette chromosome has led to a better understanding of mrsa infection cycle in hospital. the meca-associated hypervariable region size classifies mrsa isolates that colonized in nasal carriers. objectives: t...

2013
Mei-Lan Mo Seung-Min Hong Hyuk-Joon Kwon Il-Hwan Kim Chang-Seon Song Jae-Hong Kim

The nucleotide sequences of a region including S1, S2, 3a, 3b and E genes of twenty-seven infectious bronchitis virus (IBV) isolates in Korea between 1990-2011 were determined and phylogenetic and computational recombination analyses were conducted. The sizes of coding regions of some genes varied among IBV isolates due to deletion or insertion of nucleotides; the nucleotide similarities of S1,...

2013
A. Balasubramaniam

Background: Infectious bronchitis virus (IBV) affects the upper respiratory tract and the reproductive tract, and some strains can cause nephritis. Large number of serotypes and genotypes of the virus have been identified and for the most part do not cross-protect. Identifying the genotype or serotype of IBV field strains is empirical for selecting an appropriate candidate to serve as vaccine s...

پایان نامه :دانشگاه تربیت معلم - تهران - دانشکده ادبیات و علوم انسانی 1394

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Journal: :The Journal of general virology 1988
D Cavanagh P J Davis

We have sequenced 200 to 240 bases of the matrix (M) glycoprotein gene of 23 strains of infectious bronchitis virus (IBV) representing the A (D207), B (D3896), C (D3128), D (D212), Massachusetts (Mass), UK11 and UK12 serotypes. The bases examined code for the external, hydrophilic region and the first membrane-embedded hydrophobic region of M, both regions comprising approximately 20 amino acid...

Journal: :Virology 2008
Roser Dolz Joan Pujols German Ordóñez Ramon Porta Natàlia Majó

An in-depth molecular study of infectious bronchitis viruses (IBV) with particular interest in evolutionary aspects of IBV in Spain was carried out in the present study based on the S1 gene molecular characterization of twenty-six Spanish strains isolated over a fourteen-year period. Four genotypes were identified based on S1 gene sequence analyses and phylogenetic studies. A drastic virus popu...

2016
István Kiss Tamás Mató Zalán Homonnay Tímea Tatár-Kis Vilmos Palya

Routine molecular diagnostic testing by our laboratory, based on using a primer pair with conservative binding sites on the spike glycoprotein coding sequence, has indicated the recurring of a unique phylogenetic cluster of chicken infectious bronchitis viruses (IBV) in the Middle East since 2010. The nearly full-length S1 subunit of the spike gene phylogeny of selected strains, however, split ...

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