Economic effects of clinical chicken anemia agent infection on profitable broiler production

An outbreak of anemia dermatitis syndrome caused by chicken anemia agent (CAA) occurred in 15 broiler flocks. An average of 29% of chickens in these flocks were derived from a common breeder flock. The breeder flock had no antibody to CAA at 20 weeks of age but had seroconverted by 31 weeks. Disease...

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Bibliographic Details
Published inAvian diseases Vol. 36; no. 3; p. 566
Main Authors McIlroy, S.G. (Department of Agriculture for Northern Ireland, Stormont, Belfast, Northern Ireland), McNultry, M.S, Bruce, D.W, Smyth, J.A, Goodall, E.A, Alcorn, M.J
Format Journal Article
LanguageEnglish
Published United States 01.07.1992
Subjects
Anemia - economics
Anemia - microbiology
Anemia - veterinary
Animals
Breeding
Chickens
COSTOS
COUT
Disease Outbreaks - veterinary
Efficiency
Eggs
HATOS
Ireland
IRLANDA DEL NORTE
IRLANDE DU NORD
MORTALIDAD
MORTALITE
PARVOVIRIDAE
PESO
POIDS
POLLO DE ENGORDE
POULET DE CHAIR
Poultry Diseases - economics
Poultry Diseases - microbiology
PRODUCCION DE CARNE
PRODUCTION DE VIANDE
RENTABILIDAD
RENTABILITE
TERAPEUTICA MEDICAMENTOSA
THERAPEUTIQUE MEDICAMENTEUSE
TROUPEAU
Virus Diseases - economics
Virus Diseases - veterinary
Ireland
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Summary:An outbreak of anemia dermatitis syndrome caused by chicken anemia agent (CAA) occurred in 15 broiler flocks. An average of 29% of chickens in these flocks were derived from a common breeder flock. The breeder flock had no antibody to CAA at 20 weeks of age but had seroconverted by 31 weeks. Diseased broiler flocks were derived from eggs laid by the breeder flock between 25 and 30 weeks of age. CAA infection in the breeder flock was subclinical, with no apparent effects on mortality or performance. A strategic program of therapeutic and/or prophylactic antibiotic therapy was begun in affected broiler flocks as soon as the disease was diagnosed. Nevertheless, when the cost of therapy was taken into account, affected broiler flocks had a net income 17.3% to 19.6% lower than normal flocks. Average bird weights were 3.3% to 3.5% lower in affected flocks than in unaffected flocks, and affected flocks had a significantly greater proportion of lighter birds. Average mortality in affected flocks was 2.0% to 2.3% higher than in normal flocks, with peak mortality occurring in the third week of life. There was no apparent effect on feed conversion ratio
Bibliography:9311764
L73
E20
L01
ISSN:0005-2086
1938-4351
DOI:10.2307/1591750