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  1. Infectious bronchitis virus and infectious bursal disease virus : a study performed at Universidad Nacional of Costa Rica por Lindahl, Johanna

    Publicado 2004
    “…The pens had open net walls and thus some problems with biosecurity. Blood samples sent to the laboratory for routine antibody control showed that in spite of vaccine strategies, protection against IBV was low at 44 days of age.…”
    L3

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