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  • Title: Egg-production drop in turkeys associated with alphaviruses: eastern equine encephalitis virus and Highlands J virus.
    Author: Wages DP, Ficken MD, Guy JS, Cummings TS, Jennings SR.
    Journal: Avian Dis; 1993; 37(4):1163-6. PubMed ID: 8141750.
    Abstract:
    Alphaviruses were isolated from tracheas of turkey breeders in two North Carolina flocks experiencing a severe drop in egg production. Highlands J virus was isolated from one of the breeder flocks, in which production decreased by as much as 72.6% in selected houses over a 48-to-96-hour period. Eastern equine encephalitis virus was isolated from the second breeder flock, which experienced an egg-production drop of 44.5%. Clinical signs in both flocks were similar, with inactivity and the egg-production drop being the only clinical signs observed. Eggs from affected breeders were small and white, and a few were soft-shelled. Sera collected from the flocks 2 to 3 weeks after production began dropping confirmed the presence of antibodies to the viruses recovered. In the first flock, egg production failed to return to above 50%, although heat stress may have played a role in production recovery. The second flock was taken out of production and recycled.
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