. The diseases of poultry. 62 DisKASEs or sitism which is not seen in our other domesticated animals. One of the mites has domiciled itself in the air-sacs of the gallinaceous birds, especially in poultry and pheasants, and is found at times in great numbers even iu the abdominal sacs and in those which pene- trate the bones. This mite, called the Cylodili's vuduSy is closely related to those mites which live upon the skin and cause mange or scabies. Indeed, when first discovered it was supposed by Gerlach to be one of the mange insects and to cause an internal form of that disease. C
. The diseases of poultry. 62 DisKASEs or sitism which is not seen in our other domesticated animals. One of the mites has domiciled itself in the air-sacs of the gallinaceous birds, especially in poultry and pheasants, and is found at times in great numbers even iu the abdominal sacs and in those which pene- trate the bones. This mite, called the Cylodili's vuduSy is closely related to those mites which live upon the skin and cause mange or scabies. Indeed, when first discovered it was supposed by Gerlach to be one of the mange insects and to cause an internal form of that disease. Careful study has shown that while the Cytodites is closely related to the mange acari, it differs from them in very im- portant characters. The mouth parts in the mange mites are formed to cut and tear the flesh and enable the mite to burrow into the skin, or, at least, to puncture the skin and obtain blood or serum for its suste- nance. In the air-sac mites the mouth parts are grown together and form a tube through which liquids may be sucked, but which is not adapted for tearing or puncturing the flesh. It would appear, therefore, that mites can only produce a superficial irritation by their presence and movements upon the delicate surface of the mucous membranes, or possibly by depositing a virulent saliva such as is supposed to be the cause of a part of the. Fijr. \2.—Cytodites tinJus. male. 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, bookcollectionamer, bookdecade1890, bookyear1899
