ANIMALS ATTACKED BY TUBERCULOSIS. 



Man, — Tuberculosis is very prevalent in the liuoian family, and was 

 estimated by Dr. Robert Koch of Berlin to be the cause of one- 

 seventh of all tlie deaths of the human race, while fully one-third of 

 those who die in middle age are carried off by the same disease. 



Dr. Edward Hitchcock of Amherst College informs me that there 

 were 38,049 deaths reported in the State of Massachusetts for the 

 year 1885. and 5,955 of these were reported as caused by consump- 

 tion. This is a larger proportion than that given by Dr. Koch, but it 

 is probably onl}' an average percentage for people living under the 

 weakei.ing influences of our modern civilization. 



Travelers tell us that consumption is entirely unknown among many 

 of the savage tribes. This may be due to their life in the open air, 

 and freedom from the conventionalities of dress, or to the fact that 

 the disease has never been carried to them so as to gain a foot-hold. 



Ox. — The bovine race shows a strong tendency to tuberculosis, 

 especially in confinement, but far less when at large. 



Sa,vink. — These animals are without doubt very susceptible to the 

 disease, notwithstanding the opinion so frequently expressed to the 

 contrary. The number of cases on record and the circumstances 

 surrounding them, place the Jiiatter beyond all doubt. 



Horse. — This animal appears to possess an almost al)Solute immuni- 

 ty from tuberculosis, and many believe that it never has the disease, 

 but there are several cases on record. Gerlach states that he had 

 known of four cases. Tuberculosis in the horse was reported by 

 Gotti in the Journal of Anatomy of Pisa for 1872, and also by 

 BruckmuUer and others. Some doubt, however, has been expressed 

 about these cases, and many tliink they were only cases of chronic 

 glanders. 



Dr. J. Mc Fadyean reported two cases in the Journal of Compar- 

 ative Pathology and Therapeutics for March, 1888, in which the lungs, 

 spleen and other organs contained a large number of tubercles char- 

 acteristic of this disease, and stained sections of the diseased organs 

 revealed enormous numbers of the bacilli of tuberculosis. Tliis, of 

 course, settles the question, and we can no longer doubt that the horse 

 may have this disease. 



Sheep. — The existence of tuberculosis in sheep is not yet well 

 established. The descriptions thus far published by observers are of 

 such a nature as to leave doubt whether thev reallv had cases of tu- 



