. The pathology and differential diagnosis of infectious diseases of animals : prepared for students and practitioners of veterinary medicine . Veterinary medicine; Communicable diseases in animals. 496 CONTAGIOUS EPITHELIOMA epithelial nodular form occurs more frequently in the south. The statement is quoted by Jowett that chicken pox is one of the most destructive diseases of chickens in Southern Africa. Etiology. Chicken pox seems to be due to a filterable virus. Rivolte considered the cause to be a protozoan parasite belonging to the Gregarinidia. Symptoms and morbid anatomy. The disease m
. The pathology and differential diagnosis of infectious diseases of animals : prepared for students and practitioners of veterinary medicine . Veterinary medicine; Communicable diseases in animals. 496 CONTAGIOUS EPITHELIOMA epithelial nodular form occurs more frequently in the south. The statement is quoted by Jowett that chicken pox is one of the most destructive diseases of chickens in Southern Africa. Etiology. Chicken pox seems to be due to a filterable virus. Rivolte considered the cause to be a protozoan parasite belonging to the Gregarinidia. Symptoms and morbid anatomy. The disease manifests itself by the formation of nodules composed of tissue of an epitheloid nature on the areas of the skin free or nearly so of feathers about the head. The nodules are formed often with a caseous center and usually remain discrete. At other times the contents may be of a flaky or coagulated ma- terial. When the lesions are in the mouth they resemble those of diph- theria. When the no- dules appear on the eyelids, the eyes may become closed and the fowl die of starvation. Prevention. Manteu- fel was the first to im- munize fowls against contagious epithelioma by vaccination. He succeeded by injecting into the circula- tion or subcutaneous tissue a substance prepared from scrap- ings of epithelial or mucous membranes mixed with salt solution. He also claimed that therapeutic results followed such injections. Later Hadley and Beach, Giltner and Mack reported success in vaccinating fowls with an emulsion prepared from the nodules. Mack grinds this carefully in a mortar with sand in a small quantity of salt solution. It is then filtered through cotton, diluted with nor- mal salt solution until it is moderately turbid and attenuated by heating in a water bath at 55 C. for one hour. Each fowl is then given 1 of the attenuated virus subcutaneously in an unfeathered area beneath the wing. He reports satisfactory Fig. 119. head of fowi, showing lesions ABOUT THE MOUT
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectveterin, bookyear1916
