. Special pathology and therapeutics of the diseases of domestic animals. Veterinary medicine. 806 up with certainty. Some enzootics have a great similarity to nagana, while others are more closely related to surra (see also p. 837 and p. 812). Etiology. The Trypanosoma brucei, recognized as the cause of nagana, is on an average 25-33 i^ long, /* broad, and possesses a central oval nucleus, a blunt, Indian-club-shaped posterior end, slightly developed undulating membrane, and long flagellum (Fig. 141). Under the microscope it exerts a lively snake-like movement, but without pr
. Special pathology and therapeutics of the diseases of domestic animals. Veterinary medicine. 806 up with certainty. Some enzootics have a great similarity to nagana, while others are more closely related to surra (see also p. 837 and p. 812). Etiology. The Trypanosoma brucei, recognized as the cause of nagana, is on an average 25-33 i^ long, /* broad, and possesses a central oval nucleus, a blunt, Indian-club-shaped posterior end, slightly developed undulating membrane, and long flagellum (Fig. 141). Under the microscope it exerts a lively snake-like movement, but without pronounced locomotion. Pathogenicity. Inoculation of blood containing trypano- somes, under the skin or into the blood circulation of horses, causes after from 2 to 6 days a marked elevation of temperature and in the first case also a painful swelling at the point of injection. About the end of the first week the fever diminishes but reappears later at certain inter- vals,_ and during the duration of the febrile attack trypanosomes may be demonstrated in great numbers in the blood. In the meantime edematous swellings appear on the lower abdo- men, and in the vicinity of the ex- ternal genital organs; the animals emaciate in spite of continuous, and often ravenous appetite; marked mus- cular atrophy and also pronounced anemia develop. Sometimes turbidity and ulceration of the cornea results with subsequent iritis. Finally a condition re- sembling lumbar paralysis sets in, whereupon the animals die from 15 days to 4 months after the appearance of the first symptoms. In donkeys and mules the clinical picture is similar, although sometimes with a still more protracted course after artificial infection; the zebra is also susceptible to artificial inoculations (Martini). In cattle, also in sheep and goats the inoculation usually results in a chronic disease. Dogs and eats are very susceptible to infection, and likewise become affected under symptoms of recurrent fever, edamatous swelli
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectveterin, bookyear1912
