Phylogenetic and molecular characteristics of Eurasian H9 avian influenza viruses and their detection by two different H9-specific RealTime reverse transcriptase polymerase chain reaction tests
نویسندگان
چکیده
منابع مشابه
Chinese and Global Distribution of H9 Subtype Avian Influenza Viruses
H9 subtype avian influenza viruses (AIVs) are of significance in poultry and public health, but epidemiological studies about the viruses are scarce. In this study, phylogenetic relationships of the viruses were analyzed based on 1233 previously reported sequences and 745 novel sequences of the viral hemagglutinin gene. The novel sequences were obtained through large-scale surveys conducted in ...
متن کاملDevelopment and Evaluation of Real-Time Reverse Transcription Polymerase Chain Reaction Test for Quantitative and Qualitative Recognition of H5 Subtype of Avian Influenza Viruses
Avian influenza viruses (AIV) affect a wide range of birds and mammals, cause severe economic damage to the poultry industry, and pose a serious threat to humans. Highly pathogenic avian influenza viruses (HPAI) H5N1 were first identified in Southeast Asia in 1996 and spread to four continents over the following years. The viruses have caused high mortality in chickens and various bird species ...
متن کاملValidated RealTime reverse transcriptase PCR methods for the diagnosis and pathotyping of Eurasian H7 avian influenza viruses
BACKGROUND Avian influenza (AI) caused by H7 AI viruses (AIVs) of both low pathogenicity (LP) and high pathogenicity (HP) are notifiable poultry diseases. OBJECTIVES Design and validate two RealTime reverse transcriptase polymerase chain reactions (RRT PCRs) for Eurasian H7 AIV detection and pathotyping. METHODS The H7 RRT PCRs amplified within the (i) HA2 and (ii) cleavage site CS regions ...
متن کاملMultiplex Reverse Transcriptase-PCR Assay for Typing and Subtyping of Influenza A (H5 & H9) Virus in Iran
Avian influenza virus (AIV) infection is a major cause of bird or human mortality and morbidity, therefore the rapid identification of the virus is of important clinical and epidemiological implication. Methods: A multiplex Reverse Transcriptase PCR (RT-PCR) was optimized for the detection of influenza A virus and the H5 and H9 subtypes. The influenza type A specific primers were directed to t...
متن کاملcomparison between rt- pcr and viral isolation for detection of h9 subtype of avian influenza viruses
during 2004-2006, a total number of 22 tissue samples obtained from poultry flocks suspected to respiratory diseases submitted to avian virology laboratory of faculty of veterinary medicine, were prepared for avian influenza virus (aiv) isolation in embryonated chicken eggs, according to the standard method. rt-pcr was established on tissue samples using specific primers for h9 gene. amplified ...
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ژورنال
عنوان ژورنال: Veterinary Microbiology
سال: 2013
ISSN: 0378-1135
DOI: 10.1016/j.vetmic.2012.11.013