Specifio Contagious Diseases. 87 



The duration of the mild forms is twelve to fifteen days. 

 Treatment is similar to that of Sheep-pox and the same 

 precautions should be taken to prevent its dissemination, 



DOG-POX. 



These animals sometimes contract Small-pox or Sheep- 

 pox, and have been supposed to have their own specific 

 form besides. The young suffer most frequently and se- 

 verely. There is the usual preliminary fever, with an 

 eruption on the sides and belly passing from pimples to 

 vesicles and pustules, and finally drying up into crusts which 

 drop off. The eruption may be discrete or confluent, the 

 latter being very fatal. Similar preventive measures are 

 demanded, as in the other forms of pox. 



BIED-POX, 



Birds seem susceptible to different forms of variola, hav- 

 ing contracted the disease from man in some cases, and in 

 others conveyed it to the sheep. Chickens failed to con- 

 tract Cow-pox in the experiments of Eoll and myself. It 

 has proved very fatal in chickens, but very sliglitlj' so in 

 pigeons, turkeys, and geese. The eruption appears mainly 

 on the head, under the wing, on the tongue, or in the 

 pharynx. In fatal cases death ensued in four or five days. 

 Treatment would rarely be' desirable, the great point being 

 to stamp out the malady by destroying the diseased and 

 disinfecting the place. 



APHTHOUS FEVEK, FOOT-AKD-MOTJTH DISEASE. 



A contagious eruptive fever, attacking cloven-footed 

 animals and communicable to other warm-blooded animals, 

 including even man. Its special feature is the eruption of 

 blisters in the mouth, on the udder and teats, and on the 



