blue comb

blue comb
noun also blue comb disease
Etymology: so called from its discoloring effect on the combs of fowls
: a severe disease of domestic fowl and certain other birds that resembles Bright's disease of man and is due to unknown causes, although both a virus and excessive consumption of common salt have been implicated and hereditary factors may play a part

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Vet. Pathol.
a disease of birds resembling Bright's disease in humans affecting esp. domestic fowl, characterized by fever, sunken eyes, and shriveling of the skin of the wattles, shanks, and comb. Also called x-disease.
[1940-45]

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blue comb,
a disease of poultry similar to Bright's disease in man, characterized in poultry by cyanosis of the comb and wattles; monocytosis.

Useful english dictionary. 2012.

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