. The diseases of poultry. Poultry. DISEASES OF POULTRY. 105 time, or whether the warm season favors the dissemi nation and the development of the disease is not clear That infection may occnr in older birds and in cold weather is de- monstrated by Moore's experi- ments in which turkeys five months old and weighing six to eight pounds were exposed in November and December, and in which the disease was well de- veloped by the latter part of De- cember and the early part of January. The disease begins in the caeca; sometimes it is found in but one of these organs but oftener it af- fects both. W
. The diseases of poultry. Poultry. DISEASES OF POULTRY. 105 time, or whether the warm season favors the dissemi nation and the development of the disease is not clear That infection may occnr in older birds and in cold weather is de- monstrated by Moore's experi- ments in which turkeys five months old and weighing six to eight pounds were exposed in November and December, and in which the disease was well de- veloped by the latter part of De- cember and the early part of January. The disease begins in the caeca; sometimes it is found in but one of these organs but oftener it af- fects both. With the progress of the disease, the mucous mem- brane may be shed and acoagu- lable fluid poured out into the caecum. In some cases this ex- udate appears as isolated masses, which adhere to certain spots of the mucous membrane; in others, it fills the entire tube with a yel - lowish-white mass or plug, built up of concentric layers and con- sisting of a mixture of blood corpuscles, fibrin and round cells. The wall of the affected caecum is thickened, and the inflammation may extend to the outer or serous coat upon which yellowish exudates are sometimes seen that may bind the organ to the other caecum, to other parts of the intestine or to the abdominal wall. In no case. Fig-. 18.—Caeca of diseas- ed Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Salmon, D. E. Washington, D. C. , G. E. Howard & co.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectpoultry, bookyear1899
