infectious bronchitis (ib) is a very contagious disease caused by a coronavirus (ibv). in chickens, thevirus affects the respiratory, reproductive, and urinary systems. this study was carried out to determine theseroprevalence of anti-ibv antibodies in domestic village chickens. serum samples of 300 domestic villagechickens from esfahan (centeral iran) were collected and examined for the presen...

the genus of salmonella is very polymorphic and comprised of a number of genetically closely related serotypes. it is one of the emerging pathogen in food-borne disease which is often found in contaminated chicken eggs. salmonella enterica is considered one of the major pathogens in public health worldwide. a total of 31 salmonella isolates identified by specific antisera, which included salmon...

objective: survey of molecular characterization of nucleoprotein gene of h9n2 avian influenza viruses and determination of the genetic relationship of iranian h9n2 viruses and other asian viruses. materials and methods: the nucleoprotein (np) genes from 4 isolates of h9n2 viruses isolated from commercial chickens in iran during 2008-2009 were amplified by rt-pcr method and sequenced. nucleotid...

Vaccination of poultry is an important control measure for avian influenza employed in the countries where the disease is endemic. We have formulated a coupled ODE-PDE model of avian influenza in domestic birds with imperfect vaccination and age-since-vaccination structure, which includes distinct features of vaccine-induced partial protection. Interestingly, our results show that vaccination c...

We recently identified a novel virus, designated avian hepatitis E virus (avian HEV), from chickens with hepatitis-splenomegaly (HS) syndrome in the USA. We showed that avian HEV is genetically related to swine and human HEVs. Here we report the antigenic cross-reactivity of the putative open reading frame 2 (ORF2) capsid protein of avian HEV with those of swine and human HEVs and the Australia...

This article refers to:RETRACTED ARTICLE: Role of aflatoxin toxicity on transmissibility and pathogenicity H9N2 avian influenza virus in turkeys

The interest in avian medicine grows every year, and the degree of successful diagnosis and treatment in our avian patient has increased tremendously over the last 2 decades. For a veterinarian interested in avian practice there are many decisions to be made before one just accepts a patient. As outlined in this summary, there are many decisions to make regarding the level and diversity a pract...

The highly pathogenic avian H5N1 influenza virus could infect humans with high mortality rate, even though it has not yet become efficiently transmissible among humans. This proteomic study investigated the molecular basis of interspecies transmission and host range of this lethal virus in Asia, due to its potential pandemic threat. Although there are host markers located in previous research b...

The complete mitochondrial DNA (mtDNA) molecule of the ostrich, Struthio camelus, was sequenced. The size of the molecule is 16,591 nucleotides. Since the ostrich represents the paleognathous birds, comparison with the mtDNA of the neognathous chicken, the only avian species reported so far in databases, made it possible to identify common and, probably, general avian mtDNA characteristics. Rel...

Hepatitis delta virus (HDV) is a highly pathogenic human RNA virus whose genome is structurally related to those of plant viroids. Although its spread from cell to cell requires helper functions supplied by hepatitis B virus (HBV), intracellular HDV RNA replication can proceed in the absence of HBV proteins. As HDV encodes no RNA-dependent RNA polymerase, the identity of the (presumably cellula...