. The pathology and differential diagnosis of infectious diseases of animals : prepared for students and practitioners of veterinary medicine . Veterinary medicine; Communicable diseases in animals. TUBERCtXLOSIS 149. Fig. 25. Tubebcle bactbbia. (a) BOVINE VABIETT FBOM A YOUNG CTJLTUBE ON GLTCEKIN AGAK. (b) BOVINE VAKIETT PBOM THE MOUTH OF A COW HAVING ADVANCED PULMONABT TUBERCULOSIS. (c) AVIAN TUBERCLE BACTERIA FROM A- GLYCERIN AGAR CULTUBE. (x ABOUT 1000.) shaped organism with rounded ends, from 2 to 5 (J. in length and from to (J. broad. The rods are straight or slightly curved, and
. The pathology and differential diagnosis of infectious diseases of animals : prepared for students and practitioners of veterinary medicine . Veterinary medicine; Communicable diseases in animals. TUBERCtXLOSIS 149. Fig. 25. Tubebcle bactbbia. (a) BOVINE VABIETT FBOM A YOUNG CTJLTUBE ON GLTCEKIN AGAK. (b) BOVINE VAKIETT PBOM THE MOUTH OF A COW HAVING ADVANCED PULMONABT TUBERCULOSIS. (c) AVIAN TUBERCLE BACTERIA FROM A- GLYCERIN AGAR CULTUBE. (x ABOUT 1000.) shaped organism with rounded ends, from 2 to 5 (J. in length and from to (J. broad. The rods are straight or slightly curved, and occur singly, in pairs or in small bundles. They do not produce spores, but vacuoles are often observed and branching forms have been described. The bacterium of tuberculosis is readily cultivated on artificial media such as blood serum, glycerinated agar and bouillon after it has been adapted to such artificial conditions.* It is, however, not easy to cultivate it directly from ordinary tuberculous lesions. Although at the time of their discovery, tubercle bacteria from man and from animals were believed to be identical, they have been found to possess slightly different characters and properties. Smith pointed out in 1898, that morphologically tubercle bacteria from cattle were shorter and thicker than those from man, that they grow slightly different on blood serum, and that they were much more virulent for cattle and rabbits than those from the human species. Since that time his conclusions have been confirmed by a number of investigators. Koch *To accomplish this necessitates a very special and careful procedure. Dr. Theobald Smith, of Harvard University (Jour, of Exp. Med., Vol. Ill, 1898, p. 451), has the credit of first for- mulating a method by combining details in such a maimer that the procuring of cultures is, in most cases, possible. He used dog serum drawn aseptically and congealed at the mini- mum temperature. Other media have been used more recently but the fact
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectveterin, bookyear1916
