نتایج جستجو برای: ویروس آنفولانزای h9n2
تعداد نتایج: 5305 فیلتر نتایج به سال:
در این پایان نامه، یک مدل ریاضی ازگسترش آنفولانزای مرغی به دنیای پرندگان و دنیای انسان بررسی و تجزیه و تحلیل شده است. مدل ریاضی موجود به عفونت انسان به وسیله آنفولانزای مرغی مشترک بین انسان و پرندگان می پردازد.تجزیه و تحلیل پایداری و رفتار دراز مدت این بیماری به وسیله شبیه سازی با مقادیر پارامترهای مختلف انجام شده است
Development of live attenuated influenza vaccines (LAIV) against avian strains with pandemic potential is an important public-health strategy. Either 1 or 2 10(7)-TCID(50) doses of H9N2 LAIV A/chicken/Hong Kong/G9/97 were administered intranasally to 50 adults in isolation; 41 participants were H9N2 seronegative, 24 of whom received 2 doses. The vaccine was well tolerated; vaccine shedding was ...
Low pathogenic avian influenza (H9N2) is of major concern for the poultry industry especially in Iran, as the virus can spread rapidly in and between flocks, causing high mortality and severe economic losses. The aim of this study was to determine the pathogenicity of H9N2 avian influenza virus in thymus and bursa of Fabricius of commercial broiler chickens, so we studied the histologic lesions...
To gain more insight in underlying mechanisms correlating to protection against avian influenza virus (AIV) infection, we investigated correlates of protection after AIV H9N2 infection and studied the contribution of different adjuvants to a protective response at host transcriptional level. One-day-old chickens were immunised with inactivated H9N2 supplemented with w/o, Al(OH)(3), CpG or witho...
influenza Avirus subtype H7N1 antigen to find out its relatedness by means of the HI assay. The H7 antigen reacted with WHO reference antibodies to high titers (HI titer, 320), indicating antigenic similarity with influenza A(H7N9) isolated from China. This revealed the appropriateness of using the H7 virus antigen in the study. All serum samples from the high-risk group and the general populat...
UNLABELLED The H9N2 influenza viruses that are enzootic in terrestrial poultry in China pose a persistent pandemic threat to humans. To investigate whether the continuous circulation and adaptation of these viruses in terrestrial poultry increased their infectivity to pigs, we conducted a serological survey in pig herds with H9N2 viruses selected from the aquatic avian gene pool (Y439 lineage) ...
Influenza viruses of avian origin continue to pose pandemic threats to human health. Some of the H5N1 and H9N2 virus subtypes induce markedly elevated cytokine levels when compared with the seasonal H1N1 virus. We previously showed that H5N1/97 hyperinduces tumor necrosis factor (TNF)-alpha through p38 mitogen activated protein kinase (MAPK). However, the detailed mechanisms of p38MAPK activati...
Two human-infecting avian influenza viruses (AIVs), H7N9 and H10N8, have emerged in China, which further indicate that the H9N2 subtype of AIVs, as an internal gene donor, may have an important role in the generation of new viruses with cross-species transmissibility and pathogenicity. H9N2 viruses that contain such internal genes widely exist in poultry but are rarely reported in migratory bir...
زمینه و هدف: آنفولانزا یک بیماری حاد دستگاه تنفسی است که در اثر ویروس آنفولانزا ایجاد میشود. همهگیریهای آنفولانزا هر ساله گزارش میشوند و پاندمی با فواصل متغیر اتفاق میافتد. اکثر موارد مرگ و میر، ناشی از بیماری زمینهای و عوارض آنفولانزا است. در این مطالعه به بررسی ده مورد مرگ ناشی از آنفولانزای نوع a (h1n1) در پاندمی 2010-2009 پرداختهایم. مواد و روش ها: این مطالعه از نوع بررسی علت مرگ و م...
Avian influenza viruses of the H9N2 subtype have seriously affected the poultry industry of the Far and Middle East since the mid-1990s and are considered one of the most likely candidates to cause a new influenza pandemic in humans. To understand the genesis and epidemiology of these viruses, we investigated the spatial and evolutionary dynamics of complete genome sequences of H9N2 viruses cir...
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