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  • Infectious bronchitis live vaccine increases H9N2 avian influenza virus replication in broiler chicks.

    Author(s) : Tavakkoli, H.Asasi, K.Mohammadi, A.

    Author Affiliation : Department of Avian Medicine, School of Veterinary Medicine, Shiraz University, Shiraz, Iran.

    Journal article : Online Journal of Veterinary Research 2009 Vol.13 No.2 pp.37-47

    Abstract : H9N2 avian influenza virus (AIV) has a low pathogenic index yet it causes high mortalitymortalitySubject Category: Miscellaneous
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    , probably due to co-infections. Infectious Bronchitis Live Vaccine (IBLV) is used extensively in chicken farms throughout Asia. In this study, a real time PCR assay was performed to study the effect of IBLV on H9N2 avian influenza virus replication in broiler tissue. Three groups of 25 one day old commercial broiler chickschicksSubject Category: Organism Groups
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    were used. All birdsbirdsSubject Category: Organism Names
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    , except the control group, were challenged with A/Chicken/IraniranSubject Category: Geographic Entities
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    /SH-110/99(H9N2) virus. One group was further vaccinated with H120 strain of IBLV. Infected chicks exhibited facial edemaedemaSubject Category: Diseases, Disorders, and Symptoms
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    edemaSubject Category: Diseases, Disorders, and Symptoms
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    , conjunctivitisconjunctivitisSubject Category: Diseases, Disorders, and SymptomssymptomsSubject Category: Diseases, Disorders, and Symptoms
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    , depression, lacrimation, ruffled feathersfeathersSubject Category: Anatomical and Morphological Structures
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    , coughing, sneezing, swelling of infra orbital sinusessinusesSubject Category: Anatomical and Morphological Structures
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    and gasping but symptoms were most severe in chicks given IBLV. Tissue samples from tracheatracheaSubject Category: Anatomical and Morphological Structures
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    , kidney, lung, and fecesfecesSubject Category: Miscellaneous
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    fecesSubject Category: Miscellaneous
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    were collected at 3, 7, 11 and 15 days post-inoculation (PI) for molecular detection and quantitation of the H9N2 AIV. The H9N2 AIV titer from chicks given IBLV was generally higher than other groups on all days PI and persisted longer in lung and kidney tissues, and feces. These findings suggest that IBLV not only exacerbates the severity of H9N2 AIV clinical sings in infected birds but also increases replication and sheddingsheddingSubject Category: Miscellaneous
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    of this virus.

    ISSN : 1328-925X

    URL : http://users.comcen.com.au/˜journals/...

    Record Number : 20103052985

    Publisher : Online Journal of Veterinary Research

    Location of publication : Toowoomba

    Country of publication : Australia

    Language of text : English

    Indexing terms for this abstract:

    Organism descriptor(s) : birdsbirdsSubject Category: Organism Names
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    , fowlsfowlsSubject Category: Organism Names
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    , infectious bronchitis virusinfectious bronchitis virusSubject Category: Organism Names
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    , Influenza A virusinfluenza a virusSubject Category: Organism Names
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    , OrthomyxoviridaeorthomyxoviridaeSubject Category: Organism Names
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    , virusesvirusesSubject Category: Organism Names
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    Descriptor(s) : avian infectious bronchitisavian infectious bronchitisSubject Category: Diseases, Disorders, and Symptoms
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    , avian influenzaavian influenzaSubject Category: Diseases, Disorders, and Symptoms
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    , avian influenza A virusesavian influenza a virusesSubject Category: Organism Groups
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    , avian influenza virusesavian influenza virusesSubject Category: Organism Groups
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    , broilersbroilersSubject Category: Organism Groups
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    , bronchitisbronchitisSubject Category: Diseases, Disorders, and Symptoms
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    , chickschicksSubject Category: Organism Groups
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    , conjunctivitisconjunctivitisSubject Category: Diseases, Disorders, and Symptoms
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    , effectseffectsSubject Category: Properties
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    , facefaceSubject Category: Anatomical and Morphological Structures
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    , faecesfaecesSubject Category: Miscellaneous
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    , feathersfeathersSubject Category: Anatomical and Morphological Structures
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    , infectionsinfectionsSubject Category: Diseases, Disorders, and Symptoms
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    , infectious diseasesinfectious diseasesSubject Category: Diseases, Disorders, and Symptoms
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    , influenzainfluenzaSubject Category: Diseases, Disorders, and Symptoms
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    , influenza virusesinfluenza virusesSubject Category: Organism Groups
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    , live vaccineslive vaccinesSubject Category: Commodities and Products
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    , lungslungsSubject Category: Anatomical and Morphological Structures
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    , mixed infectionsmixed infectionsSubject Category: Diseases, Disorders, and Symptoms
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    , mortalitymortalitySubject Category: Miscellaneous
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    , oedemaoedemaSubject Category: Diseases, Disorders, and Symptoms
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    , poultrypoultrySubject Category: Organism Groups
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    , quantitative techniquesquantitative techniquesSubject Category: Techniques, Methodologies and Equipment
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    , replicationreplicationSubject Category: Miscellaneous
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    , sheddingsheddingSubject Category: Miscellaneous
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    , sinusessinusesSubject Category: Anatomical and Morphological Structures
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    , symptomssymptomsSubject Category: Diseases, Disorders, and Symptoms
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    , tracheatracheaSubject Category: Anatomical and Morphological Structures
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    , vaccinesvaccinesSubject Category: Commodities and Products
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    , viral diseasesviral diseasesSubject Category: Diseases, Disorders, and Symptoms
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    , viral replicationviral replicationSubject Category: Miscellaneous
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    , respiratory diseasesrespiratory diseasesSubject Category: Diseases, Disorders, and Symptoms
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    Identifier(s) : attenuated vaccines, avian influenzavirus, bird flu, bird grippe, bird influenza, chickens, communicable diseases, death rate, domesticated birds, edemaedemaSubject Category: Diseases, Disorders, and Symptoms
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    , fecesfecesSubject Category: Miscellaneous
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    , flu, fowl plague virus, IBV infection, Influenzavirus, multiple infections, pink eye, viral infections

    Geographical Location(s) : IraniranSubject Category: Geographic Entities
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    Broader term(s) : vertebratesvertebratesSubject Category: Organism Names
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    , ChordatachordataSubject Category: Organism Names
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    , animalsanimalsSubject Category: Organism Names
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    , eukaryoteseukaryotesSubject Category: Organism Names
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    , Gallus gallusgallus gallusSubject Category: Organism Names
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    , GallusgallusSubject Category: Organism Names
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    , PhasianidaephasianidaeSubject Category: Organism Names
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    , GalliformesgalliformesSubject Category: Organism Names
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    , birdsbirdsSubject Category: Organism Names
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    , Avian coronavirusavian coronavirusSubject Category: Organism Names
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    , GammacoronavirusgammacoronavirusSubject Category: Organism Names
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    , CoronavirinaecoronavirinaeSubject Category: Organism Names
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    , CoronaviridaecoronaviridaeSubject Category: Organism Names
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    , NidoviralesnidoviralesSubject Category: Organism Names
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    , positive-sense ssRNA Virusespositive-sense ssrna virusesSubject Category: Organism Names
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    , ssRNA Virusesssrna virusesSubject Category: Organism Names
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    , RNA Virusesrna virusesSubject Category: Organism Names
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    , virusesvirusesSubject Category: Organism Names
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    , Influenzavirus Ainfluenzavirus aSubject Category: Organism Names
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    , OrthomyxoviridaeorthomyxoviridaeSubject Category: Organism Names
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    , negative-sense ssRNA Virusesnegative-sense ssrna virusesSubject Category: Organism Names
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    , Developing Countriesdeveloping countriesSubject Category: Miscellaneous
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    , Middle Eastmiddle eastSubject Category: Geographic Entities
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    , Threshold Countriesthreshold countriesSubject Category: Miscellaneous
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    , West Asiawest asiaSubject Category: Geographic Entities
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    , AsiaasiaSubject Category: Geographic Entities
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