نتایج جستجو برای: h9n2

تعداد نتایج: 1132  

A Barin , A Ghalyanchi-Langeroudi , F Mahboudi , M Tavassoti-Kheiri , MH Bozorgmehri-Fard , V Karimi ,

Background and Aims: Since 1998, Iranian poultry industry has been affected by avian influenza (AI) virus, subtype H9N2. The association of high mortality and case report of H5N1 and H9N2 influenza virus in wild birds in recent years raised the suspicion of a possible new genetic modified AI virus. Methods: Partial nucleotide sequences and deduced amino acid of hemagglutinin (HA) genes of 4 H9...

Journal: :iranian journal of virology 0
f tayefeh-fazel-khalkhali science and research branch, islamic azad university, tehran, iran m soleimani tasnim biotechnology research center, aja university of medical sciences, tehran, iran k majidzadeh-a iranian centers for breast cancer (icbc); academic center for education, culture and research (acecr), tehran, iran a ghalyanchi-langeroudi departments of microbiology, faculty of veterinary medicine, university of tehran, tehran, iran mr zolfaghari department of microbiology, qom branch, islamic azad university, qom, iran v karimi departments of clinical sciences, faculty of veterinary medicine, university of tehran, tehran, iran

background and aims: avian influenza (ai) h9n2 subtype was first reported to infect turkeys in the united states in 1966 and has been panzootic in europe and asia. the impact of avian influenza caused by h9n2 viruses in iran is now significantly more severe than in previous years. methods: sequence analysis and phylogenetic study of the complete coding region polymerase a (pa) gene of h9n2 subt...

2016
Lulu Huang Tao Qin YinYan Yin Xue Gao Jian Lin Qian Yang Qinghua Yu

The objective of this study was to evaluate the stimulatory effects of Bacillus amyloliquefaciens SQR9 on dendritic cells (DCs) and to verify its ability to enhance the immune response by modulating DC maturation. The results demonstrated that B. amyloliquefaciens SQR9 can adhere to the nasal epithelium and be taken up by DCs in the nasal mucosa, thereby inducing DC maturation and resulting in ...

2017
Jing Xia Jia-Qi Cui Xiao He Yue-Yue Liu Ke-Chang Yao San-Jie Cao Xin-Feng Han Yong Huang

H9N2 avian influenza virus (AIV) has caused significant losses in chicken flocks throughout china in recent years. There is a limited understanding of the genetic and antigenic characteristics of the H9N2 virus isolated in chickens in southwestern China. In this study a total of 12 field strains were isolated from tissue samples from diseased chickens between 2013 and 2016. Phylogenetic analysi...

2016
T. Akhtar G. Ara N. Ali F. ud Din Mufti M. Imran Khan

Avian influenza (AI) is a highly contagious disease causing significant economic losses worldwide. The aim of this study is to evaluate the effect of mannan-oligosaccharide (MOS) on tracheal and cloacal virus shedding in AI challenged broilers and contamination of environment with H9N2. A total of 300 1-day-old-broiler chicks were randomly divided into 3 groups (A, B and C) and supplemented 0.2...

2015
Amir Hossein Asl Najjari Zolfaghar Rajabi Mehdi Vasfi Marandi Gholamreza Dehghan

Influenza is a contagious viral disease that is seen in avian, human and other mammals, so its control is important. Vaccination against influenza virus subtype H9N2 is one of the ways in controlling program, for this reason several vaccines has been produced. Recently, application of inactivated oil-emulsion vaccines in poultry for controlling low pathogenic avian influenza is increasing. At p...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده دامپزشکی 1391

آنفلوانزای پرندگان یک بیماری واگیر ویروسی است که در طیف وسیعی از پرندگان اهلی و وحشی، انسان و برخی دیگر از پستانداران دیده می شود. کنترل این بیماری اهمیت زیادی داشته و واکسیناسیون علیه ویروس آنفلوانزای تحت تیپ h9n2 یکی از راه های کنترلی این بیماری است، به همین دلیل چندین نوع واکسن تولید شده و واکسن امولسیون روغنی در طیور برای کنترل آنفلوانزای پرندگان (به ویژه آنفلوانزای پرندگان با بیماری زایی پ...

Journal: :The Southeast Asian journal of tropical medicine and public health 2001
P Huang H Ni G Shen H Zhou G Peng S Liu

Influenza surveillance networks in Guangdong were established to investigate the epidemiological characteristics of influenza and influenza epidemics. Influenza activity peaked annually from March to July in Guangdong in 1991-2000; influenza H3N2 predominated in the epidemic (7 years of 10); the outbreak of influenza in 1996 was the remarkable result of antigenic drift of H3N2 strain. Ten isola...

Journal: :Cell host & microbe 2013
Aiping Wu Chunhu Su Dayan Wang Yousong Peng Mi Liu Sha Hua Tianxian Li George F Gao Hong Tang Jianzhu Chen Xiufan Liu Yuelong Shu Daxin Peng Taijiao Jiang

Initial genetic characterizations have suggested that the influenza A (H7N9) viruses responsible for the current outbreak in China are novel reassortants. However, little is known about the pathways of their evolution and, in particular, the generation of diverse viral genotypes. Here we report an in-depth evolutionary analysis of whole-genome sequence data of 45 H7N9 and 42 H9N2 viruses isolat...

Journal: :Journal of virology 2013
Lindomar Pena Troy Sutton Ashok Chockalingam Sachin Kumar Matthew Angel Hongxia Shao Hongjun Chen Weizhong Li Daniel R Perez

H5N1 and H9N2 avian influenza virus subtypes top the World Health Organization's list for the greatest pandemic potential. Inactivated H5N1 vaccines induce limited immune responses and, in the case of live-attenuated influenza virus vaccines (LAIV), there are safety concerns regarding the possibility of reassortment between the H5 gene segment and circulating influenza viruses. In order to over...

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