TUBERCULOSIS IX OTHER MAMMALS 203 



tention to this peculiarity of the disease. Stockman shows 

 that while the disease is ordinarily generalized, muscular 

 lesions may exist in swine in the absence of generalization. 

 Zschokke has called special attention to the localization of 

 tuberculous lesions in the head of swine, especially in the nares 

 and brain. 



TUBERCULOSIS IX OTHER MAMMALS 



^ 147. Genera affected. It is stated that all species 

 are sometimes attacked. Tuberculosis in the horse is rare, 

 although a total of many cases hav^e been reported. Bang has 

 collected twenty-nine cases. In Saxony .oS per cent of the 

 horses (3,500) that were slaughtered were tuberculous. In 

 this and most countries there are no reliable statistics respect- 

 ing the extent of the disease in this species. M'Fadyean has 

 pointed out the fact that in a considerable number of cases of 

 equine tuberculosis, where the horses have been fed milk from 

 tuberculous cows, the morbid anatomy differs but slightly from 

 that in tuberculous cattle. Recently several authors have 

 reported isolated cases in Europe. In this country horses are 

 practically free from it. 



Sheep and other domestic animals are reported to suffer 

 more or less extensively from this disease. All of the so-called 

 tuberculosis in sheep that I have examined proved not to be 

 tuberculosis but the " nodular disease " caused by an animal 

 parasite, {Oesopagostoma Cohimbiamiui). A few cases, how- 

 ever, have been reported. 



Tuberculosis in dogs and cats is quite rare but several 

 cases in each genus are on record. 



AVIAN TUBERCULOSIS 



§148. History. In America, tuberculosis in fowls was de- 

 scribed by Pernot in Oregon in 1900. In 1903 Moore and Ward 

 found the disease in California, where in certain flocks it was 



