Isolation of H9N2 Subtype of Avian Influenza Viruses during an Outbreak in Chickens in Iran

isolation of h9n2 subtype of avian influenza viruses during an outbreak in chickens in iran

avian influenza is an important disease of poultry with the potential to cause major epidemics resulting in significant economic losses. the presence of avian influenza viruses (aiv) in chickens in iran has not been previously reported. an avian influenza outbreak in broiler, layer and breeder farms occurred during a very hot summer in july 1998. three aiv isolates designated as 101, 102 and 10...

Molecular characterization of non-structural gene of H9N2 subtype of avian influenza viruses isolated from broiler chickens in Iran

BACKGROUND: The H9N2 subtype of avian influenzaviruses (AIVs) have spread in Asia and Middle East countriesand have become a serious threat to poultry industry in Iran.OBJECTIVES:Characterization of genes of H9N2 subtype involvingin pathogenicity and diagnosis are crucial in control of avianinfluenza outbreaks. The Nonstructural (NS) gene and its proteinproducts (NS1 & NS2) are important as dia...

Isolation and Identification of Avian Influenza Virus H9N2 Subtype

Phylogenetic analysis of PB2 gene of H9N2 subtype of avian influenza viruses isolated from commercial chickens in Tehran province of Iran during 1998-2001

The PB2 protein of influenza A viruses has been shown as host range determinant. In this study PB2gene of five H9N2 isolates from Tehran province during the period of 1998-2001 were partially amplifiedand sequenced to do phylogenetic study. Iranian isolates could be classified in Eurasian lineage according totheir PB2 gene sequences. The PB2 genes of these isolates are different from those of M...

Detection and Isolation of H9N2 Subtype of Avian Influenza Virus in House Sparrows (Passer domesticus) of Ahvaz, Iran

Avian influenza (AI) is an acute infectious disease with worldwide significance causing extensive economic losses in the poultry industry. Avian influenza viruses (AIVs) belong to the family Orthomyxoviridae and categorized in the genus influenza virus A. These viruses have been isolated from more than 100 species of free-living birds. Migratory birds are considered as reservoirs for AIVs and a...

molecular characterization of non-structural gene of h9n2 subtype of avian influenza viruses isolated from broiler chickens in iran

background: the h9n2 subtype of avian influenzaviruses (aivs) have spread in asia and middle east countriesand have become a serious threat to poultry industry in iran.objectives:characterization of genes of h9n2 subtype involvingin pathogenicity and diagnosis are crucial in control of avianinfluenza outbreaks. the nonstructural (ns) gene and its proteinproducts (ns1 & ns2) are important as...