CHICKEN ANEMIA
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Causative Agent(s)
Caused by Cirvoviridae, DNA virus, also called "blue wing disease" or "haemorrhagic aplastic anaemia syndrome". It is transmission by direct contact, fomites, or egg transmission (vertical). Age resistance to disease (but not infection) begins at 1 week and is complete by 2 weeks. Older birds can still get disease if co-infected with immunosuppressive agents.
Clinical Presentation and Epidemiology
Chicks infected while in the egg are anorectic, lethargic, and pale. PCV is low (<27), and blood smears can show a pancytopenia. Death can occur. Gangrenous dermatitis (“blue wing”). Anaemia results from destruction of hemocytoblasts in the bone marrow.
Diagnostic Considerations
Detection of virus antigen or DNA in thymus, bone marrow, or liver. Commercial ELISA available to detect antibodies.
Management and Treatment:
None. Can treat secondary bacterial infection with antibiotics.