. Poultry diseases and their treatment. Poultry. EXTERNAL PARASITES 45 The tearing off of the scabs favors the escape of the para- sites, which in warm weather may live in the filth, roosts, nests or other parts of the building for at least thirty days, and may in that time find their way upon other birds and infest them, causing in turn scaly legs on the new host. Thus birds become affected by being placed In infested quarters, or by having an infested bird placed in the same lot or enclosure as at poultry shows, should any of the birds there be infested. Symptoms.—This parasite attacks chick
. Poultry diseases and their treatment. Poultry. EXTERNAL PARASITES 45 The tearing off of the scabs favors the escape of the para- sites, which in warm weather may live in the filth, roosts, nests or other parts of the building for at least thirty days, and may in that time find their way upon other birds and infest them, causing in turn scaly legs on the new host. Thus birds become affected by being placed In infested quarters, or by having an infested bird placed in the same lot or enclosure as at poultry shows, should any of the birds there be infested. Symptoms.—This parasite attacks chickens, tur- keys and cage birds, but the writer has not ob- served it infesting _ . ~ « ducks or geese. It al- ways attacks the un- feathered portion of the legs above the foot, and often the upper portion of the toes. The minute parasite crawls under the scales of the legs and there irritates the tissue by attack- ing it with its strong mouth parts. As a result of this irrita- tion a vesicle or small blister appears. The blister is practically microscopic in size and later ruptures. This small quantity of serum dries and forms a minute scale. These scales accumulate until later large scaly masses appear. Fig. 11 is a good illustration of this condition. The parasites can be found as minute whitg specks in the serum between the scab and leg. Both legs are usually affected at the same Fig. II. Scaly Legs (Scabies) A, Mass of scabs due to dried serum that exudes from injured part. B, scale of leg forced up and out of place by accumulation of dried 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 Kaupp, Benjamin Franklyn, 1874-; Campbell, Delwin Morton, 1880- ed. Chicago, American Journal of Veterinary Medicine
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Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
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Keywords: ., bookauthorka, bookcentury1900, bookdecade1910, booksubjectpoultry
