Fachbereich Veterinärmedizin


Service-Navigation

    Publikationsdatenbank

    Avian adenoviruses infektions with special attention to inclusion body hepatitis/hydropericardium syndrome and egg drop syndrome (2011)

    Art
    Zeitschriftenartikel / wissenschaftlicher Beitrag
    Autor
    Hafez, HM
    Quelle
    Pakistan veterinary journal; 31(2) — S. 85–92
    ISSN: 0253-8318
    Sprache
    Englisch
    Verweise
    URL (Volltext): http://edocs.fu-berlin.de/docs/receive/FUDOCS_document_000000019838
    Kontakt
    Institut für Geflügelkrankheiten

    Königsweg 63
    14163 Berlin
    Tel.+49 30 838 62676 Fax.+49 30 838 62690
    email:gefluegelkrankheiten@vetmed.fu-berlin

    Abstract / Zusammenfassung

    The first avian adenovirus (AAV) associated with clinical disease was isolated from an outbreak of respiratory disease in quail in 1950 (Olson, 1950). Since that time, AAVs have been found in all types and breeds of chickens and from a variety of other avian species. The infections may be asymptomatic or associated with several clinical and pathological conditions. Vertical transmission via the egg is the most common way of transmission. Also horizontal transmission through faeces, contaminated egg trays, crates and trucks play a role in the infection route. Studies have demonstrated the presence of antibodies in healthy poultry, and viruses have been isolated from normal birds. Avian adenoviruses in chickens are the etiological agents of 2 diseases known as inclusion body hepatitis (IBH) and hydropericardium syndrome (HP). In some cases each condition is observed separately, however, recently the 2 conditions have frequently been observed as a single entity; therefore, the name hepatitis hydropericardium has been widely used to describe the pathologic condition. The syndrome is an acute disease of young chickens associated with anemia, haemorrhagic disorders, hydropericardium and high mortality. Egg-Drop-Syndrome (EDS) is caused also by an adenovirus. The disease is characterised by a severe drop in egg production as well as the production of shell-less, thin-shelled, discoloured or misshapen eggs in apparently healthy birds. Ducks and geese are the natural host of the EDS virus. It was first described in chickens in the 1970s and spread to several countries world wide. The birds usually do not show any other signs of disease, and mortality is not expected. There is no specific treatment of the AAV infections. Active immunization by vaccination using an inactivated is wide spread.