. The diseases of poultry. Poultry. 190 DISEASES OF POULTRY. falls into a decline which continues until the forces of the body are exhausted and it dies. During the course of the disease the affected birds give off a dis- agreeable odor which has been likened by some to that of moldy cheese and by others to the exhalations from mice, cat's urine, or macerating animal substances. Causation.— Favus is a contagious disease, and, as has already been stated, it is caused by a fungus which has been named Achorioii Schonlcinii. If a small particle of one 'P of the crusts is taken, • O .. ."^-C^
. The diseases of poultry. Poultry. 190 DISEASES OF POULTRY. falls into a decline which continues until the forces of the body are exhausted and it dies. During the course of the disease the affected birds give off a dis- agreeable odor which has been likened by some to that of moldy cheese and by others to the exhalations from mice, cat's urine, or macerating animal substances. Causation.— Favus is a contagious disease, and, as has already been stated, it is caused by a fungus which has been named Achorioii Schonlcinii. If a small particle of one 'P of the crusts is taken, • O .. ."^-C^ |\ placed upon a glass t'^ slip and moistened with water or dilute acetic acid and sul)- mitted to microscopic examination at a magnification of 300 to 500 diameters, it is seen to be made up of threads or mycelium of the fungus held to- gether by a thick, viscid, gelatinous sui) - stance which it se- cretes. Numerous spherical or ovoid spores are also visible both within the filaments and in a free condition. An examination of the feathers on the affected parts re - veals the fact that the fung-us has penetrated the shaft, filled it with crusts, and has in some cases even reached the barbs. The disease may be inoculated from bird to Fig-. 54.—The Achoiioii .Srlioii/iiiiii of the favus of poultry; mag-nified 800 diameters. tT\ empty tubes; //, tubes filled with protoplasm and containing spores; s, iso- lated 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
