. A text-book of bacteriology, including the etiology and prevention of infective diseases and a short account of yeasts, and moulds, haematazoa, and psorosperms. Bacteriology. 240 INFECTIVE DISEASES. tissue of the lungs, and into the trachea, without any result except a small abscess at the seat of puncture. Administration of the virus by the mouth gave equally negative results. The lungs from a recently killed animal infected with pleuro-pneumonia were placed in a shed occupied by healthy heifers, and left there for several days. Fodder, litter, and manure were taken from places in which the
. A text-book of bacteriology, including the etiology and prevention of infective diseases and a short account of yeasts, and moulds, haematazoa, and psorosperms. Bacteriology. 240 INFECTIVE DISEASES. tissue of the lungs, and into the trachea, without any result except a small abscess at the seat of puncture. Administration of the virus by the mouth gave equally negative results. The lungs from a recently killed animal infected with pleuro-pneumonia were placed in a shed occupied by healthy heifers, and left there for several days. Fodder, litter, and manure were taken from places in which there were diseased cattle, and placed in contact with healthy cattle, and sub- sequently all the animals used in these experiments were slaughtered and carefully examined, and the results were absolutely negative. Similarly negative results followed experiments made by )Sander-. L'^s'V'r.^'.'. ™ Fig. 119.—Infectious Plbuko-Pneumonia of Cattle, x 480. a,a^a, Exudation in air-vesicles, composed of a network of fibrinous lymph with entangled leucocytes; 6,&, the same caseating; c, the air-vesicle filled with leucocytes only. In the centre is a blood-vessel filled with a fibrinous plug. (Hamilton.) son and Duguid, and thus coniirmed the conclusion arrived at bj' Brown, that the disease could only be communicated by actual contact of a living, diseased animal with a healthy one. The symptoms of the disease in cattle are a rise of temperature to 105° or 107°, and a peculiar dry cough, and later the usual indications of pneumonia, difficulty in breathing, and dulness on percussion. As a rule, death follows from exhaustion ; but the disease may also assume a chronic form, if the animal escapes slavighter, and the lung may become gangrenous or tubercular. The period of incubation is about thirty days, but it is uncertain. The lesions are. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloratio
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherphila, bookyear1897
