. Fiyr. 64.—Growth of liora from region of head affected with tuberculosis. birds. It appears, therefore, out of the question to produce a rapidly spreading outbreak of disease among fowls or pigeons by the use of human virus. The bird or avian tuberculosis spreads rapidly from bird to bird and is easily transmitted experimentally to birds, but it has liitle effect upon most mammals which are very susceptible to human tuberculosis. There is, consequently, a marked difference between avian and mammalian tuberculosis. The disease in the two cases does not appear to be absolutely distinct, but sh
. Fiyr. 64.—Growth of liora from region of head affected with tuberculosis. birds. It appears, therefore, out of the question to produce a rapidly spreading outbreak of disease among fowls or pigeons by the use of human virus. The bird or avian tuberculosis spreads rapidly from bird to bird and is easily transmitted experimentally to birds, but it has liitle effect upon most mammals which are very susceptible to human tuberculosis. There is, consequently, a marked difference between avian and mammalian tuberculosis. The disease in the two cases does not appear to be absolutely distinct, but should rather be regarded as two varieties of the same malady. These varieties have been de- veloped because the bacilli have grown for a long series of years under different conditions. They may still possibly be changed from mammalian to avian
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectpoultry, bookyear1899
