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Scientific Articles

Isolation of chicken anaemia virus from broiler chickens in New Zealand

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Pages 58-62 | Accepted 13 Jun 1993, Published online: 22 Feb 2011
 

Abstract

Chicken anaemia virus was isolated for the first time in New Zealand from the New Zealand domestic chicken population. The virus was recovered from diseased birds in five separate flocks of broiler chickens aged between 14 and 33 days of age. Six isolates were obtained from bone marrow and lymphoid tissues using the MDCC-MSBl cell line. derived from Marek's disease lymphoma. All isolates were resistant to chloroform and survived exposure to 70 °C for 5 minutes.

The main clinical features consistently associated with the disease outbreaks were increased mortality, yolk sac infections, sub-cutaneous haemorrhages and atrophy of the thymus. Fungal pneumonia occurred in two flocks, and gangrenous dermatitis as a result of bacterial infection in another flock. Microscopic examination showed atrophy of the thymus, reduced medullary haematopoiesis and inflammation resulting from secondary infections.

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